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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. FL = Only found along the highway cyclone-fence line, but is far enough off the roadside to pose an immediate problem for the lands adjacent to the fences. At the time of the survey, did not appear to be moving off the fence line yet.

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 18, 2005, updated April 1, and may be periodically updated.

Start east end of town of Tehachapi (PM 94.30)

95.00 - NS (but lots of tumbleweeds)
96.00 - NS (tumbleweeds solid)
97.00 - NS
98.00 - NS
99.00 - NS
100.00 - NS
101.00 - NS (Cameron Road)
102.00 - NS
103.00 - NS
104.00 - NS
105.00 - NS
106.00 - NS
107.00 - NS
108.00 - NS

New Divided Freeway starts, with different PM numbers:

165 - NS (Junction of exit to town Mojave)
166 - NS
167 - NS (Junction of Cal. Hwy. 14)
168 - NS
169 - NS
170 - NS
171 - NS
172 - NS
173 - NS (Lots of Amsinckia)
174 - NS (Lots of Amsinckia)

New highway rejoins old highway, and old PM numbers restarting:

118.50 - NS (Lots of Amsinckia)
119 - NS (Lots of Amsinckia)
120 - NS (Lots of Amsinckia)
121 - NS (Lots of Amsinckia, Phacelia--excellent example of
what Mojave roadsides should look like)

122 - RS - SL scattered
123 - RS - SL scattered
124 - MED - SL
125 - NS
126 - NS (Amsinsckia and Phacelia in median)
127 - NS

California City turnoff
128 - NS (Amsinsckia)

Edward AFB exit
129 - MED - SL
130 - MED - SL
131 - MED - SL
132 - NS - (North Edwards exit)
133 - RS - BT & SL
134 - RS - BT & SL
135 - RS - BT & SL
136 - RS - BT & SL
137 - RS - BT & SL
138 - RS & MED - SL - (Gephart exit)
139 - RS & MED - SL - (Rest stop, SL mixed 50/50 with Des. Dandelion)
140 - RS & MED - SL
141 - RS & MED - SL
142 - RS & MED - SL

San Bernardino County line, Cal. Hwy 58

0.00 - NS
1 - RS - SL rare, scattered
2 - NS - (Kramer Station - solid Amsinckia)
2.50- - NS - (crossing railroad tracks)
3 - RS - SL
4 - RS - SL
5 - NS - Jct. US 395, Kramer Junction
6 - RS - BT & SL
7 - RS - BT & SL
8 - RS - BT thick & SL
9 - RS - BT very thick
10 - RS - BT, north side
11 - RS - BT
12 - DES - BT and ONLY SITE of SO
13 - RS - BT - thick around creosotes
14 - DES - BT
15 - DES - BT
16 - FL - BT
17 - FL - BT
18 - FL - BT

Harper Lake

19 - FL - BT
20 - FL - BT
21 - FL - BT
22 - FL - BT
23 - RS - BT (Road goes from 4 lanes to 2 lanes with no median)
24 - RS - BT & SL scattered
25 - RS - BT & SL
26 - RS - BT & SL thick in places
27 - RS & DES - BT & SL thick in places, going into ag. lands
28 - RS & DES - SL going 1/2 mile off roadside into ag. lands
29 - RS & DES - SL going into ag. lands - (Dixie Road)
30 - RS & DES - SL going into desert - (Lenwood Avenue)
31 - RS & DES - SL going into desert - (Road goes from 2 lanes to 4 lanes, with a median)
32 - DES - SL in Mojave River-side ag. lands, solid. - (Mojave River = PM 32.50)
33 - DES - BT
34 - DES - BT
34.50 - DES - BT - Junction of Cal. Hwy. 247 in Barstow