No. 3 - Autumn, 1996, updated November 2011
Native Grass Ecotypes.
with an Ecotype bibliography in chronological order, 1880-1996

Edited and published by Craig Dremann of The Reveg Edge (sm).
P.O. Box 361, Redwood City, Cal. 94064. Phone (650) 325-7333 or e-mail
The URL of this issue is:

If you would like to read the previous and more recent issues about native grasses : Index at



--Implications for genetic studies

--Implications for biodiversity, conservation and taxonomy

--Implications for ecology and ecological restoration practitioners

--Implications for evolutionary sciences

--Ecotypes and who needs them

--Establishing ecotype refugia: The Native Heritage Program.

--A history of ecotype and related research: 1880-1996, in chronological order.

--Photos of six native grass (Bromus carinatus) ecotypes from the San Francisco Bay Area


Copyright ©1996, 1999 by Craig C. Dremann, The Reveg Edge, Box 609, Redwood City, CA. 94064

Ecotypes are no secret! Ecotypes are biological realities known for 116 years in Europe and 90 years in America. One hundred years ago, researchers perplexed by the variations of species found in extreme environments, collected specimens from the Alps and the sea coasts, grew them in common gardens, and confirmed that extreme environments created genetically fixed ecotypes.

AN ECOTYPE is an organism whose physical structure has over time recorded the local environment, and those records are genetically fixed. Plant ecotypes record: the local elevation, frost free days, latitude, precipitation, soil fertility, soil moisture, soil type, sun and shade, temperatures, and wind speed. Simply put, ecotypes allow us to see life's environmental connections.

What can ecotypes teach us about the environment? This ecotype question isn't just a troublesome thing to work out, but rather ecotype knowledge will be valuable to a lot of scientific disciplines. Ecotype knowledge will be useful for geneticists, taxonomists, the evolutionary sciences and ecological restoration practitioners; and will be critical for discussing biodiversity and conservation.


When the environment bends a biome's genetics, the grasses are among the first to bend, at least in an immediately obvious fashion. The ability to read ecotype variations in grasses is like having a key to translating the ecotype language for all the plants in an area. Native grasses, as sensitive ecotypic indicators, can become as important for studying native plant genetics as the fruit fly is indispensable for the study of animal genetics.


The Linnean classification system of genus and species limits our view of life to think of plants and animals as scientific bionomial names. The Linnean system can give us a false confidence that as long as you know the species, you don't need to look further, and it restricts our ability to conserve and protect biodiversity in plant communities. We need the ability to express ecological adaptations of a species to a particular habitat. Grinnell & Miller (1944) were able to accomplish this with birds when they related bird subspecies to life zones and ecological formations. Their Screech owl and Song sparrow subspecies are the equivalent of bird ecotypes. The conservation of biodiversity needs attention below the species level, to the ecological level, to the ecotype level.

Study of native grass ecotypes will renew Clements, Turesson, Gregor and Lawrence's idea of creating a new taxonomic language relating the species and its ecotypes to the habitat that created them. Frederic Clements, America's first major ecotype researcher, wrote in 1908 that species have a connection to their environment. Clements' contribution changed the concept of species. No longer would a species just be an assemblage of morphological structures. Through ecotypes, he reconnected species to their habitats.

Focusing on the relationship between species and habitat, Gote Turesson wrote in 1925, "With the increase in our knowledge of ecotypes, now in its beginning, a natural system of life forms will doubtlessly be built up. There can be no doubt as to the great importance of such a system for the understanding of the interrelations of plants and their habitats..."

Ecotype taxonomy would be useful for the ecologist and ecological restorationist to discuss the variations they have encountered and are working with. Four years ago, Theunissen (1992), a researcher in South Africa, began investigations of grasses with the goal of creating such an ecotype classification system. We will all eagerly await the results of Theunissen's work.

IMPLICATIONS For Ecology and Ecological Restoration Practitioners.

Ecotype knowledge is valuable for the ecologist and ecological restoration practitioner. Knowing what constitutes a local ecotype, what makes it important and how far away it can be moved will give certain practitioners a distinct economic advantage. The person with ecotype knowledge and understanding about the complex union between species and site will have an edge over other restorationists who only know what species to plant.

Turesson (1925,1931) outlined nine environmental extremes that created unique populations of ecotypes:

Table 1--Turesson's environmental extremes that create ecotypes.

1.) Typical local lowland or inland populations that all other ecotypes were compared with = typical.
2.) Limestone or other rock formations (calcareous) = afar.
3.) Shifting dune populations (prostrate, fast-growing stolons to avoid being buried by sand) = arenarius.
4.) Coastal bluffs or stationary dunes, with fast drying soils = campestris
5.) Elevational ecotypic varieties, a.) Subalpine = subalpinus. b.) Alpine = alpinus.
6.) Latitudinal ecotypic variation.
7.) Edges of the species range (i.e. the extreme northern and southern points of the area of distribution).
8.) Saline soils (fleshy leaves) = salinus.

My common garden of Bromus carinatus ecotypes fell into some of the same environmental categories as Turesson's:

Table 2--Dremann's environmental extremes that create ecotypes, based on Bromus carinatus

1.) Typical woodland form, that all other ecotypes were compared with.

2.) Serpentine soil, (or soil with high mineral content like carbonate) dries out quickly, nutrient poor and toxic minerals, plants are dwarfed and set seed quickly.

3.) Sand dune populations, plants prostrate to keep sand stable around the roots; sand dried out quickly so plants set seed quickly.

4.) Windswept coastal bluffs or windswept hilltops, the most variation within a pop.

5.) Elevational ecotypic variations, usually changing on 1500 foot bands.

6.) Latitudinal ecotypic variation from south to north, usually changing every 50 miles.

7.) Boundaries between two biomes, like the point of contact between a grassland and a forest, or woodland and desert, etc.

8.) Areas of known endemism for other species, 99.9% chance of a unique population.

9.) At the low of high annual precipitation area for the species.

10.) Cold air pockets, extreme dwarf, cold tolerant population.

11.) Isolated valleys, or geographically isolated populations.

COMMON GARDEN LOOK AT ECOTYPE GENETICS. Conducted by planting different populations of the same species in the same environmental conditions. If the populations are genetically uniform, the plants will grow out in a uniform manner, with the same height, flowering dates, leaf widths, and plants looking identical. Variations between populations are called "ecotypes" and are created by the plant's interactions with its environment, and those differences can be seen below for one California native species, Bromus carinatus from the San Francisco Bay area:

La Honda Brome Marin chert brome
(Left) La Honda woods.. (Center) Marin county chert.. (Right) Marin serpentine soil.

Pescadero brome San Francisco sand dune brome Skyline brome
(Left)Pescadero coastal dwarf, (Center)San Francisco sand dunes, (Right) Skyline mountains.


Native grass ecotypes show what I call spatial evolution, or evolution flowing over geographic space, with the genetic material flowing over the land and molding itself to particular soils, rainfall, elevations, or other environmental conditions. Folds and creases in the land make folds and creases in populations---creating spatial evolution and unique ecotypes. Ecotypes on the fringe of the species' range will undoubtedly transform themselves into new species over time.

Another fascinating possibility Turesson (1925) considered was that with ecotypes, we may be able to discover the center of origin of native plant species. Utilizing Turesson's ideas and those of Vavilov (1951) for finding the centers of cultivated plants---the centers of origin for native species might be found.


To rebuild the natural environment around us, ecotypes will be the bricks we will need for the foundations:

Farmers, ranchers and orchard managers who covet their topsoil; to keep topsoil in their fields, out of streams, to control water pollution: they'll need native ecotypes.

Miners with a desire to revegetate mined areas according to the California Surface Mining and Reclamation Act of 1975, they'll need help from the ecotypes.

Caltrans (California Department of Transportation) and other highway departments, wishing to stop the herbiciding along roadsides, and to plant vegetation that is low-growing and low maintenance and keeps out weeds; they'll need to study the local ecotypes.

The Forest Service and BLM, wanting to keep serpentine roadcuts, granitic ski slopes and abandoned mines from eroding and washing into streams and lakes; they'll depend on local ecotypes to hold those slopes together.

Ecotypes can furnish endless applications for bioremediation and their knowledge can create whole new areas of biological research. Ecotype knowledge will be as startling and useful to us, as the knowledge of antibiotics was useful for the practice of modern medicine. To guarantee the possibilities of this future, we need to begin the preservation of native grass refugia.


California is a land of extremes and diversity. We have 300 species of native grasses and great extremes and diversity in our soils; elevations ranging from -282 feet below sea level to 14,000 foot peaks; precipitation from near zero to over 100 inches; and dozens of native plant communities. These extremes and diversity demand preservation of our native grass genetics on a grand scale. To accomplish this, I estimate we need a minimum of one in-situ native grass seed preserve for every USGS 15 minute quad., or one every 225 square miles, which equals about 680 preserves for the state of California.

The concept of setting aside Native Heritage Preserves throughout the United States could be developed state-by-state, with a baseline of one for every 225 square miles. For example, you would divide the area of Maryland (12,407 square miles) by 225, then a minimum of 55 refugia would be needed for that state. This formula would even work well in small states like Hawaii where there is known to be a large amount of biodiversity: a minimum of 48 refugia for the island chain. We need to start thinking now: "what is the minimum we are going to preserve for the future?"

Within these preserves, or refugia, we would be banking future genetic material, models of the community structure, and wonders for future generations to discover. These preserved refugia, like the relict areas in India researched by Gadgil & Vartak (1976), may end up being the only intact examples of native ecosystems in the future. We when we preserve 680 relict refugia for California's future, this only represents one acre in exchange for every 10,000 we've taken for our own use.

Every seed company that sells native grass seed and every person who plants native grass seed or plants depends on the existence of the relict grass stands for their original genetic material. Now is the time for the relict stands to depend on us, for their continued survival. In exchange for the gifts they have given us in the past, we must guarantee that their gifts will be available for the future.

1880-1996, in chronological order.

1880. Goebel, Karl. "Beitrage zur Morphologie und Physiologie der Blätter." BOT. ZEIT. 38: 763.

1887. Bonnier, Gaston. "Note sur les cultures comparées des mêmes espèces à diverses altitudes." BULL. SOC. BOT. FRANCE. 34: 467-469.

1888. Bonnier, G. "Étude expérimentale de l'influence du climat alpin sur la végétation et les fonctions des plantes." BULL. SOC. BOT. FRANCE. 35: 436-439.

1890. Bonnier, G. "Cultures expérimnetales dans les Alpes et les Pyrénées." REV. GÉN. BOT. 2: 513-546.

1890. Lesage, M. P. "Recherches expérimentales sur les modifications des feuilles chez les plantes maritimes." REVUE GÉNÉRALE BOT. V.2.

1894. Kerner, Anton J. The Natural History of Plants, their Forms, Growth, Reproduction and Distribution. London. Blackie & Son Ltd.

1895. Bonnier, G. "Recherches expérimentales sur l'adaptation des plantes au climat alpin." ANN. SCI. NATURELLES-BOTANIQUE. 7(20): 217-360.

1895. Genslow, G. The Origin of Plant Structures by Self-adaptation to the Environment. London.

1896. Kolderup-Rosenvinge, L. "Det sydligsle Grönlands vegetatioin." MEDD. OM GRÖNL. Bd. 15.

1903. Klebs, G. Willkürliche Entwicklungsänderungen bei Pflanzen. Jena, G. Fischer.

1905. Gluck, J. T. Evolution, Racial and Habitudinal. PUB. CARNEGIE INST. WASH. No. 25.

1905. Greene, Edward L. Revision of Eschscholtzia. PITTONIA 5: 205-293. This is the first detailed botanical description and key to ecotypes and their geographic ranges of any genus of plants. Greene lacked the concept and term "ecotype", which was not invented or commonly used until two decades later; so Greene organized his eoctypes into 112 "species". His work has been generally ignored and even scoffed at, because taxonomist even to this day do not want to believe that there are possibly 112 species of California poppy. But if we now recognize his "species" as ecotypes, then it makes his paper an important historic and pioneering document: valuable for conducting ecological restoration of California wildlands, today and far into the future.

1905. Jordan, David Starr. "The origin of species through isolation." SCIENCE. 22.

1906. Klebs, G. Über künstliche Metamorphosen. Abh. d. Naturf. Gesellsch. Halle. Bd. 25

1907. Clements, F. E. "Causes of alpine dwarfing." SCIENCE. 25: 287.

1907. Clements, F. E. "Origin of new life forms in nature." SCIENCE. 25: 287.

1908. Clements, F. E. "An ecological view of the species concept." AMER. NAT. 42: 253.

1913. Bateson, W. Problems of Genetics. New York and London.

1913. Goebel, Karl. Organographie der Pflanzen. Teill. 2 Aufl. Jena. 

1918. Heribert-Nilsson, N. "Experimentelle Studien über Variatbilität Spaltung. Artbildung und Evolution in der Gattung Salix." LUNDS UNIVERSITETS ÄRSSKRIFT. N.F. Avd. 2 Bd. 14, No. 28.

1919-26. Clements, F. E. and H. M. Hall. "Reciprocal transplants: experimental taxonomy." CARNEGIE INST. WASH. YEARBOOKS No. 18-26.

1919. Turesson, Göte. "The cause of plagiotropy in maritime shore plants." LUNDS UNIVERSITETS ARSSKRIFT. N.F. Avd. 2 Bd. 16, No. 2.

1920. Bonnier, G. "Nouvrelles observations sur les cultures expérimentales à diverses altitudes." REV. GÉN. BOT. 32: 305.

1921. Hagedoorn, A.L. and A.C. The Relative Value of the Processes Causing Evolution. The Hague.

1922a. Turesson, Göte. "The species and variety as ecological units." HEREDITAS. 3: 100-113.

1922b. Turesson, Göte. "The genotypical response of the plant species to the habitat. HEREDITAS. 3: 211-350. [Good black and white photos of ecotypes!].

1923. Hall, Harvey M and Fredric E. Clements. "The Phylogenetic Method in Taxonomy. The North American Species of Artemisia, Chrysothamnus, and Atriplex. CARNEGIE INST. WASHINGTON, Publ. 326. 355 pp.

1923. Turesson, Göte. "The scope and import of genecology." HEREDITAS. 4: 171-176

1925-7. Clements, F.E. Ecogenesis. CARNEGIE INST. WASH. YEARBOOKS 24: 310; 25: 335; 26: 305.

1925. Turesson, Göte. "The plant species in relation to habitat and climate." Contributions to the knowledge of genecological units." HEREDITAS. 6: 147-236

1926. Hall, H. W. et al. Experimental taxonomy. CARNEGIE INST. WASH. YEARBOOK. 25: 345-346.

1926. Gregor, J. W. , and F. W. Sansome. "Experiments on the genetics of wild populations. Part 1. Grasses." J. GENETICS 17:349-364.

1927. Turesson, G. "Contributions to the genecology of glacial relics." HEREDITAS. 9:81-101

1928. Stapledon, R. G. "Cocksfoot grass (Dactylis glomerata) ecotypes in relation to the biotic factor." JOURNAL ECOLOGY. 16 (1): 71-104, pl. XII-XVII. [Excellent black and white photos!].

1929. Clements, Frederic E. "Experimental methods in adaptation and morphology." JOURNAL ECOLOGY. 17: 356-379.

1930. Gregor, J. W. "Experiments on the genetics of wild populations. I. Plantago maritima, L. JOUR. GEN. 22 (1): 15-25, pl. 1-2.

1930. Turesson, G. "The selective effect of climate upon the plant species." HEREDITAS 14: 99-152.

1931. Gregor, J. W. "Experimental delimitation of species." NEW PHYTOLOGIST. 30: 204-217.

1931. Turesson, G. "The geographic distribution of the alpine ecotype of some Eur-asiatic plants." HEREDITAS. 15: 329-346

1931. Sinskaia, E. N. "The study of species in their dynamics and interrelation with different types of vegetation." BULL. APPL. BOT., GENET and PLANT BREED. 25(2): 50-97.

1932. Brown-Blanquet, J. Plant Sociology: The Study of Plant Communities. McGraw-Hill, New York.

1936. Gregor, J. W. , V. McM. Davey, and J. M. S. Lang. "Experimental taxonomy. I. Experimental garden technique in relation to the recognition of the small taxonomic units." NEW PHYTOL. 35:323-350.

1937. Faegri, Knut. "Some fundamental problems of taxonomy and phylogenetics." BOT. REV. (Lancaster) 3: 400-423, 451-456.

1937. Clements, F. E. et al. Adaptation and Origin. CARNEGIE INST. WASH. YEARBOOK. 36: 222-224

1939. Clausen, J., D. D. Keck and W. M. Hiesey. "The concept of species based on experiment." AMER. BOT. 26:103-108.

1939. Clements, F. E. et al. Adaptation and Origin. CARNEGIE INST. WASH. YEARBOOK. 38: 134-137.

1939. Gregor, J. W. "Experimental taxonomy. IV. Population differentiation in North American and European seaplantains allied to Plantago maritima L." NEW PHYTOL. 38:293-322.

1940. Clausen, J., D. D. Keck and W. M. Hiesey. Experimental Studies on The Nature of Species. I. Effect of Varied Environments on Western North American Plants. CARNEGIE INST. OF WASH., Publ. 520, 452 pp. Illus.

1940. Hiesey, William M. "Environmental influence and transplant experiments. BOT. REV. (Lancaster) 6:181-203.

1941. Allard H. A. and M. W. Evans. "Growth and flowering of some tame and wild grasses in response to different photo-periods." JOUR. AGR. RES. 62: 193-228.

1941. Clausen, J., D. D. Keck and W. M. Hiesey. "Regional differentiation in plant species." AMER. NATUR. 75:231-250.

1941. Clausen, Robert T. "On the use of the terms 'subspecies' and 'variety'." RHODORA 43: 157-167.

1941. Hopkins, H. "Variations in the growth of sideoats grama grass at Hays, Kansas, from seed produced in various parts of the Great Plains Region." TRANS. KANS. ACAD. SCI. 44:86-95.

1942. Clausen, J., D. D. Keck, W. M. Hiesey and E. V. Martin. Experimental Taxonomy. CARNEGIE INST. WASH. YEARBOOK. 41: 126-134.

1942. Fosberg, F. Raymond. "Subspecies and variety." RHODORA 44: 153-167.

1942. Gregor, J. W. "The units of experimental taxonomy." CHRONICA BOTANICA. 7 (5): 193-196.

1943. Camp, Wendell H. and Charles L. Gilly."The structure and origin of species." BRITTONIA 4: 323-385.

1944. Gregor, J. W. "The ecotype." CAMBRIDGE BIOL. REV. 19: 20-30.

1944 Grinnell, Joseph and Alden H. Miller. Distribution of the Birds of California. Reprint, Artemisia Press, Lee Vining, California.

1944. Olmated, C. E. "Growth and development in range grasses. IV. Photoperiodic responses in twelve geographic strains of sideoats grama." BOT. GAZ. 106:46-74.

1944a. Wright, J. W. "Genotypic variation in white ash." J. FOREST. 44: 489-495.

1944b. Wright, J. W. "Ecotypic differentiation in red ash." J. FOREST. 42: 591-597.

1945. Clausen, J., D. D. Keck and W. M. Hiesey. Experimental Studies on the Nature of Species. II. Plant Evolution Through Amphiploidy and Autoploidy, with Examples from the Madiinae. CARNEGIE INST. WASH. PUB. No. 564.

1945. Lawrence, W. E. "Some ecotypic relations of Deschampsia caespitosa." AMER. J. BOT. 32:298-314.

1945. Olmated, C. E. "Growth and development in range grasses. V. Photoperiodic responses of clonal divisions of three latitudinal strains of sideoats grama." BOT. GAZ. 106: 382401.

1946. Gregor, J. W. "Ecotypic differentiation." NEW PHYTOL. 45:254-270.

1946a. Mason, H. L. "The edaphic factor in narrow endemism. I. The nature of environmental influences." MADRONO 8: 209-226.

1946b. Mason, H. L. "The edaphic factor in narrow endemism. II. The geographic occurrence of plants of highly restricted patterns of distribution." MADRONO 8:241-257.

1946. Smith, D. C., E. L. Nielsen, and H. L. Ahlgren. "Variation in ecotypes of Poa pratensis." BOT. GAZ. 108:143-166.

1946. Turrill, W. B. "The Ecotype concept: A consideration with appreciation and criticism, especially of recent trends" NEW PHYTOL. 45: 34-43.

1947. Clausen, J., D. D. Keck and W. M. Hiesey. "Heredity of geographically and ecologically isolated races." AMER. NATUR. 81:114-133.

1947. Cornelius, D. R. "The effect of source of little bluestem grass seed on growth, adaptation, and use in revegetation seedings." J. AGR. RES. 74: 133-143.

1947. Larson, E. C. "Photoperiodic responses of geographical strains of Andropogon scoparius." BOT. GAZ. 109: 132-149.

1948. Clausen, J., D. D. Keck and W. M. Hiesey. Experimental Studies on the Nature of Species. III. Environmental Responses of Climatic Races of Achillea. CARNEGIE INST. WASH. PUB. 581.

1950. Kruckeberg, A. R. An experimental inquiry into the nature of endemism on serpentine soils. Ph.D. Thesis, Univ. California Berkeley.

1950. Mason, Herbert L. "Taxonomy, systematic botany and biosystematics." MADRONO 10: 161-192.

1951. Clausen, Jens. Stages in the Evolution of Plant Species. Cornell Univ. Press, Ithaca, NY. 206 pp.

1951. Kruckeburg, A. R. "Intraspecific variability in the response of certain native plant species to serpentine soil." AMER. J. BOT. 38:408-419.

1951. Vavilov, Nikolai Ivanovich. "The origin, variation, immunity and breeding of cultivated plants. I. Phytogeographic basis of plant breeding." CHRONICA BOTANICA. 13 (1): 1-54.

1952. Bradshaw, A. D. "Populations of Agrostis tenuis resistant to lead and zinc poisoning." NATURE 169:1098.

1953. Constance, Lincoln. "The role of plant ecology in biosystematics." Ecology 34: 642-649.

1953a. Hiesey, W. M. "Comparative growth between and within , climatic races of Achillea under controlled conditions." EVOLUTION 7:297-316.

1953b. Hiesey, W. M. "Growth and development of species and hybrids of Poa under controlled temperatures." AMER. J. BOT. 40:205-221.

1954. Gregor, J. W. and P.J. Watson. "Some observations and reflections concerning the patterns of intraspecific differentiation." NEW PHYTOL. 53:291-300.

1954. Kruckeburg, A. R. "The ecology of serpentine soils." ECOLOGY 35:267-274.

1956a. McMillan, C. "Nature of the plant community. Uniform garden and light period studies of five grass taxa in Nebraska." ECOLOGY 37:330-340.

1956b. McMillan, C. "Nature of the plant community. II. Variation in flowering behavior within populations of Andropogon scoparius." AMER. J. BOT. 43:429-436.

1957. Harberd, D. J. "The within population variance in genecological trials." NEW PHYTOL. 56:269-280.

1957. Irgens-Moller, H. "Ecotypic response to temperature and photo-period in Douglasfir." FOREST SCI. 3:7983.

1957. McMillan, C. "Nature of the plant community. III. Flowering behavior within two grassland communities under reciprocal transplanting." AMER. J. BOT. 44: 144-153.

1958. Clausen, J. and W. M. Hiesey. Experimental Studies on the Nature of Species. IV. Genetic Structure of Ecological Races. CARNEGIE INST. WASH. PUB. 615

1958. Bjorkman, O., C. Florell, P. Holmgren. and P. Holmgren. "Preliminary observations on to anthocyanins and other flavonoid compounds and respiration rates in different ecotypes of Solidago virgaurea." PHYSIOL. PLANT. 11: 154-157.

1958. Clausen, J. and W. M. Hiesey. Experimental studies on the nature of species. IV. Genetic structure of ecological races." CARNEGIE INST. WASH. Publ. 615. Washington, D. C.

1958. Morley, F. H. W. "The inheritance and ecological significance of seed dormancy in subterranean clover (Trifolium subterraneum L.)." AUST. J. BIO. SCI. 11:261-274.

1958. Valentine, D. H. and Askell Love "Taxonomic and biosystematic categories." BRITTONIA 10: 153-166.

1959. Decker, J. P. "Some effects of temperature and carbon dioxide concentration on photosynthesis of Mimulus." PL. PHYSIOL. 34: 103-106.

1959. Eberhart, S. A and L. C. Newell. "Variation in domestic collections of switchgrass, Panicum virgatum L." AGRON. J. 51:613-616.

1959. Heslop-Harrision, J. "Variability and environment." EVOLUTION 13:145-147.

1959. Heywood, V. H. "The Taxonomic treatment of ecotypic variations" in Function and Taxonomic Importance, pages 87-112. The Systematics Association, Publ. No. 3. Academic Press, London, UK.

1959. Milner, H. W., W. M. Hiesey, and M. A. Nobs. Physiology of Climatic Races. CARNEGIE INST. WASH. YEAR BOOK 58: 346-350

1959. Vaartaja, O. "Evidence of photoperiodic ecotypes in trees." ECOL. MONOGR. 29: 91-111

1959a. McMillan, C. "The role of ecotypic variation in the distribution of the central grassland of North America." ECOL. MONOGR. 29:285-308.

1959b. McMillan, C. "Nature of the plant community. V. Variation within the true prairie community type. AMER. J. BOT. 46:418-424.

1960. Bjorkman, O., C. Florell, and P. Holmgren. "Studies of climatic ecotypes in higher plants. The temperature dependence of apparent photosynthesis in different populations of Solidago virgaurea." ANN. ROY. AGR. COLL. SW. 26: 1-10.

1960. Boivin, Bernard. "A classical taxonomist looks at experimental taxonomy. REV. CANADIAN BIOL. 19: 435-444.

1960. Bradshaw, A. D. "Population differentiation in Agrostis tenuis Sibth., III. Populations in varied environments." NEW PHYTOL. 59:92-103.

1960. Heslop-Harrision, J. New Concepts in Flowering Plant Taxonomy. Harvard Univ. Press, Cambridge, Mass. 134 pages.

1960. McMillan, C. "Ecotypes and community function." AMER. NAT. 96: 245-255.

1960. Milner, H. W., W. M. Hiesey, and M. A. Nobs. Physiology of Climatic Races. CARNEGIE INST. WASH. YEAR BOOK. 59: 313-318

1960. Perry, F. O. and C. W. Wang. "Genetic variation in the winter chilling requirement for date of dormancy break for Acer rubrum." ECOLOGY 41: 790-794.

1960. Wilkins, D. A. "Recognizing adaptive variants." PROC. LINN. SOC., LOND. SESSION 171:122126.

1961. Bjorkman and P. Holmgren. "Studies of climatic ecotypes of higher plants. Leaf respiration in different populations of Solidago virgaurea." ANN. ROY. AGR. COLL. SW. 27:297-304.

1961. Gregor, J. W. and P.J. Watson. "Ecotypic differentiation: observations and reflections." EVOLUTION 15:166-173.

1961. McMillan, C. "Nature of the plant community. IV. Texas grassland communities under transplanted conditions." AMER. J. BOT. 48:778-785.

1961. Milner, H. W., W. M. Hiesey, and M. A. Nobs. Physiology of Climatic Races. CARNEGIE INST. WASH. YEAR BOOK. 60: 379-380

1961. Mooney, H. A. and W. D. Billings. "Comparative physiological ecology of arctic and alpine populations of Oxyria digyna." ECOL. MONOGR. 31: 1-29.

1961. Tieszen, L. L. "Demonstration of photoperiodic ecotypes in Liriodendron and Quercus" CAN. J. BOT. 39:649-654.

1962. Bjorkman, O., P. Holmgren, and M. A. Nobs. Ecotypic Differences in Response to Light Intensity in Solidago virgaurea. CARNEGIE INST. WASH. YEAR BOOK 61:320-325.

1962. Cook, Stanton A. "Genetic system, variation, and adaptation in Eschscholzia californica." EVOLUTION 16: 278-299.

1962. Grant, S. A. and R. F. Hunter. "Ecotypic differentiation of Calluna vulgaris in relation to altitude." NEW PHYTOL. 61:44-55.

1962. Lodge, R. W. "Autecology of Cynosurus cristatus L. II. Ecotypic variation." J. ECOL. 50: 75-86.

1962. McKell, C. M., R. W. Robertson, and J. Major. "Ecotypic variation in medusahead, an introduced annual grass." ECOLOGY 43: 686-689.

1962. Milner, H. W., W. M. Hiesey, and M. A. Nobs. Physiology of Climatic Races. CARNEGIE INST. WASH. YEAR BOOK. 61: 313-317

1963. Bjorkman O. and P. Holmgren. "Adaptability of the photosynthetic apparatus to light intensity in ecotypes from exposed and shaded habitats." PHYSIOL. PLANT. 16: 889-914.

1963. Bourdeau, P. F. "Photosynthesis and respiration of Pinus strobus, L. Seedlings in relation to provenance and treatment." ECOLOGY 44: 710-716.

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1963. Merxmueller, Hermann. "The incompatibility between formal taxonomic recognition of units and their biosystematic definition." REGNUM VEGETABILE 27: 57-62

1963. Milner, H. W., W. M. Hiesey, and M. A. Nobs. Physiology of Climatic Races. CARNEGIE INST. WASH. YEAR BOOK 62: 393.

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1964. Mooney, H. A., R. D. Wright, and B. R. Styrain. "The gas exchange capacity of plants in relation to vegetation zonation in the White Mountains of California." AMER. MIDL. NATUR. 72:281-297.

1964. Nixon, E. S., and C. McMillan. "The role of soil in the distribution of four grass species in Texas." AMER. MID. NATUR. 71: 114-140.

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1964a Milner, H. W., and W. M. Hiesey. "Photosynthesis in climatic races of Mimulus lewissi. CARNEGIE INST. WASH. YEAR BOOK 64: 425-429.

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1965. Bjorkman O. Comparative Physiological Studies of Ecological Races of Solidago. CARNEGIE INST. WASH. YEAR BOOK 64: 415-420.

1965. Bjorkman, O., W. M. Hiesey and M. A. Nobs. Light utilization in ecological races of Mimulus cardinalis. CARNEGIE INST. WASH. YEAR BOOK 64: 420-424.

1965. Bradshaw, A. D. "Evolutionary significance of phenotypic plasticity in plants." ADV. GENET. 13: 115-155.

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1965. Krueger, K. W. and W. K. Ferrell. "Comparative photosynthetic and respiration responses to temperature and light by Pseudotsuga menziesii var. menziesii and var. glauca." ECOLOGY 46:750-751.

1965. Mark, A. F. "Ecotypic differentiation in Otago populations of narrowleaved snow tussock, Chionochloa rigda." NEW ZEALAND J. BOT. 3:277-299.

1965. McNaughton, S. J. and A. W. Johnson. "Comparative physiological ecology of an arctic and alpine population of Thalictrum alpinum L." ECOLOGY 46: 721-727.

1965. McNaughton, S. J. "Differential enzymatic activity in ecological races of Typha latifolia L." SCIENCE 150: 1829-1830.

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1965b. McMillan, C. "Grassland community fractions from central North America under simulated climates." AMER. J. BOT. 52: 109-116

1966. Bjorkman O. and P. Holmgren. "Photosynthetic adaptation to light intensity in plants native to exposed and shaded habitats." PHYSIOL. PLANT. 19:854-859.

1966. Hiesey, W. M., O. Bjorkman and M. A. Nobs. Light saturated rates of photosynthesis in Mimulus cardinalis." CARNEGIE INST. WASH. YEAR BOOK 65:481-464.

1966. Klikoff, L. G. "Temperature dependence of the oxidative rates of mitochondria in Danthonia intermedia, Penstemon davidsonii and Sitanion hystrix." NATURE 212:529-530.

1966. Kwano, S. "Biosystematic studies of the Deschampsia caespitosa complex with special reference to the karvology of Icelandic populations." THE BOT. MAG., TOKYO 79:293-307.

1966. Marchand, L. S., A. McLean, and E. W. Tisdale. "Uniform garden studies on the Artemisia tridentata Nutt. complex in interior British Columbia." CAN. J. BOT. 44: 1623-1632.

1966. Strain, B. R. and V. C. Chase. "Effect of past and prevailing temperatures on the carbon dioxide exchange capacities of some woody desert perennials." ECOLOGY 47:1043-1045.

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1966b. Bjorkman O. Carboxydismutase Activity in Relation to Light Saturated Rate of Photosynthesis in Plants from Exposed and Shaded Habitats. CARNEGIE INST. WASH. YEAR BOOK 65:454-459.

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1967. Williams, G. J. "Respiration and respiratory enzyme activity in latitudinal ecotypes of Liquidambar styraciflua L." ABSTR. BULL. ECOL. EOC. AMER. 48: 78.

1968. Klikoff, L. G. "Temperature dependence of mitochondrial oxidative rates of several plant species to serpentine soil." AMER. J. BOT. 38:408-419.

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1968 b. Bjorkman O. "Further studies on differentiation of photo synthetic properties of sun and shade ecotypes of Solidago virgaurea." PHYSIOL. PLANT. 21:84-99.

1968. Panetsos, C. A. and H. G. Baker. "The origin of variation in 'wild' Raphanus sativus (Cruciferae) in California." GENETICA 38:243-274.

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1976 Gadgil, Madhau and V. D. Vartak. "The Sacred Groves of Western Ghats in India." ECONOMIC BOTANY 30 (2): 152-160.

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1982. Antonovics, J. and R. B. Primack. "Experimental ecology and genetics in Plantago. VI. The demography of seedling transplants of P. lanceolata. JOUR. ECOL. 70:55-75.

1982. Hiesey, W. M. and M. A. Nobs. Experimental Studies on the Nature of Species. VI. Interspecies Hybrid Derivatives between Facultatively Apomictic Species of Bluegrass and their Responses to Contrasting Environments. CARNEGIE INST. WASH. PUB. 636.

1983. Hagen, Joel B. "The development of experimental methods in plant taxonomy, 1920-1950." TAXON 32:406-416.

1983. Lee, W. G., A. F. Mark, and J. B. Wilson. "Ecotypic differentiation in the ultramafic flora of the South Island, New Zealand." NEW ZEALAND JOUR. BOT. 21: 141-156.

1983. Wanntorp, H.-E. "Historical constraints in adaptation theory: Traits and non-traits." OIKOS 41: 157-160.

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1990. Molder, F. "Ecotype analysis of some wild flower species, in relation to sowing grasses and wild flowers for non-intensive management." ZEITSCHRIFT FUER VEGETATIONSTECHNIK. 13 (2): 68-74

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1992. Theunissen, J. D. "An ecosystematic investigation of Themeda triandra (Poaceae: Andropogoneae) in the semi-arid grasslands of Southern Africa. JOURNAL OF ARID ENVIRONMENTS. 23 (1): 35-44.

1992. Theunissen, J. D., G. F. Smith and O. J. H. Bosch. "An ecosystematic investigation of Eragrostis racemosa (Poaceae: Eragrostideae) in the semi-arid grasslands of Southern Africa. JOURNAL OF ARID ENVIRONMENTS. 22: 137-145

1992. Meyer, S. and S. B. Monsen. "Genetic considerations in propagating native shrubs, forbs, and grasses from seed." In: Proceedings Western Forest Nursery Assoc. Meeting, Fallen Leaf Lake, Calif., Sept. 14-18, 1992, USDA, Forest Service General Technical Report RM-221, Rocky Mtn. Forest Exp. Sta., Ft. Collins, Colorado.

1993. Dremann, Craig and Sue Dremann. "In search of native grass ecotypes in the San Francisco Bay Area. Part one: Let's find the edges and extent of the ecotype puzzle; setting up the study." GRASSLANDS 3 (3): 1-4.

1993. Stebbins, G. Ledyard. "Concept of species and genera," In: Flora of N. America Editorial Committee, Flora of North America, North of Mexico. Introduction Vol. 1: 229-246.

1994. Dremann, Craig and Sue Dremann. "In search of native grass ecotypes in the San Francisco Bay area. Part two: Environmental influences that create ecotypes and some morphological measurements." GRASSLANDS 4 (1): 3-6.

1995. Dremann, C (ed.). Craig's Juicy Native Grass Gossip and Research. No. 1. Via the INTERNET @

1995. Dremann, Craig C. "Bromus carinatus & Elymus glaucus storage, longevity, genetic changes and ecotypical variations." GRASSLANDS 5(3): 2-5.

1995. Kruckeberg, Arthur, Richard B. Walker and Alan E. Leviton, Eds. GENECOLOGY AND ECOGEOGRAPHIC RACES. Papers in the Biological Sciences Presented at the 73rd Annual Meeting of the Pacific Division AAAS on the Occasion of the 100th Anniversary of the Birth of Göte Turesson. Pacific Division, Amer. Assoc. for the Advancement of Science, Calif. Acad. of Sciences, San Francisco, CA. 285 pp. [A "MUST-HAVE" ITEM!] Only $28.95, hardcover on acid-free paper!

1996. Knapp, E and K. Rice. "Genetic structure and gene flow in Elymus glaucus (Blue Wild Rye): Implications for native grassland restoration." RESTORATION ECOLOGY. 4 (1): 1-10

1996. Dremann, C (ed.). Craig's Juicy Native Grass Gossip and Research. No. 2. Via the INTERNET @

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