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2005 California Desert Exotic Mustard Roadside Survey

Intellectual Property Notice: You are welcome to reprint this data, for your own personal use. However, if you want to distribute, reproduce, modify or incorporate this data into another product including maps, you need to obtain a license for use. Craig Dremann owns the title, copyright, and other intellectual propertiy rights on this data, and the data is licensed, not sold. Reprinting the data or utilizing it for economic purposes including projects funded by grants, without obtaining a license, the user agrees to pay liquidated damages of $100 per mile. Use of this web site constitutes your acceptance of this agreement, and Craig Dremann reserves the right to change the terms and conditions under which it offers this site. - Licenses are available for use of the data by researchers, universities, or agencies at $8 per mile.

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Cal. Hwy 14 - March-April 2005 - Raw data.

Results of a 70 mph windshield survey (or whatever the local speed limits were), of three exotic Mustards: Either not present; is present along roadsides or in medians; or is outside of the roadside to the fence line or has moved from the roadsides to infest adjacent land.

NS = None Seen. None of the three exotic Mustards of concern were seen along roadside ditches; or if divided highway, also not seen in the roadside median, or in lands adjacent to the road.

RS = Road Sides were infested. MED = In divided highways, in medians.

DES = One or more Exotic Mustards have moved from the roadsides into the desert, agricultural areas, or other lands adjacent to the roadsides.

SPECIES PRESENT:

BT = Brassica tournefortii = Sahara Mustard
SL = Sisymbrium irio = London Rocket
SO = Sisymbrium orientale = Indian Hedge Mustard

PM = Post miles along highways, and numbers indicate the averages found not just at each post mile, but for 1/2 mile on either side of the post mile marker.

(Landmarks and other notes on other exotics or native plants will be in parentheses)

Raw data March 20, 2005, updated April 4.

Start Kern County/Los Angeles County line, survey moving northward

0 = Kern County/Los Angeles County line
0-1 - NS - (Four lanes)
2 - NS
3 - NS - Rosemont exit
4 - NS
5 - NS (Native grasses)
6 - NS (Joshua tree forest and native grasses - Dawn Road)
7 - NS (Joshua tree forest)
8 - Median - SL rare
9 - Cloverleaf - SL present (Backus Road)
10 - RS - SL scattered (Native grasses present)
11 - RS - SL & SO scattered
12 - NS (Inidan ricegrass in median)
13 - RS - SL rare (cross traffic starts)
14 - NS (4 lanes, highway runs along railroad tracks)
15 - NS (Railroad bridge overpass and town starts)
16 - DES - SL (Town of Mojave). Goes to 2 lanes at PM 16.2
17 - RS - SO scattered
18 - RS - SO scattered. 4 Lanes start, Silymbium mustard as a contaminant in wheat straw used for erosion control for new Cal. 58 construction.
19 - RS - SO
20 - NS (Indian Ricegrass common)
21 - RS - BT - scattered (Junction California City exit)
22 - NS (Amsinckia)
23 - NS
24 - RS - BT
25 - NS
26 - NS
27 - NS
28 - MED - BT
29 - NS
30 - MED - BT scattered
31 - MED - BT
32 - MED - BT
33 - MED - BT
34 - MED - BT
35 - DES - BT (Jawbone Canyon. wash, the BLM ORV area infestation)
36 - RS - BT
37 - RS - BT
38 - NS
39 - RS - BT - rare
40 - RS - BT - rare
41 - RS - BT - scattered
42 - RS - BT - rare (Divided road)
43 - NS
44 - NS (Amsinckia)
45 - NS (Amsinckia)
46 - NS (Amsinckia and solid Goldfields in desert)
47 - NS
48 - NS
49 - NS
50 - NS (Indian ricegrass = roadside colonizer)
51 - NS (solid Amsinckia)
52 - NS (solid Amsinckia)
53 - NS (solid Amsinckia, Desert stipa)
Robber's Roost
54 - NS (Indian ricegrass, Amsinckia, Desert stipa)
55 - NS (Desert dandelion)
56 - NS
57 - RS - BT - rare, scattered
58 - NS
59 - NS (Amsinckia)
60 - NS
61 - NS (Elev. 3,000 feet at PM 60.50)
62 - NS (Junction 178 east - Native Poa and 4 lanes starts Encelia)
63 - NS (Solid Encelia)
64 - NS (Solid Encelia)
65 - NS - Junction with US 395

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