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Plants of Coahuila,Mexico. 
Coah; 
These plants were collected in the vicinity of Sta.Elena*which is 
located £©© 100 kilometers due north by road from Sierra Mojada, 
of 
Coah;and in the main foot-hills the eastern flank of the Sierra 
del Cruces.These foot-hills are mainly compased of Cretaceous lime, 
and shale,also numerous beds of gypsum.The Sierra del Cruces is an 
intrusive into these sediments.The intrusive is mainly composed of 
diorite and granite with later flows of basalt.Around the base of 
the mountain there is considerable metamorphosed limestone.The 
highest parts of the Sierra del Cruces reach an elevation of 1900 
meters.The foot-hills on the east around 1600 meters. 
•'226.White 40 cm.Banks of dry sandy arroyas.Abundant 3 km.N.Sta.El^na 
•"227.30 cm. In sandy dry arroyas .Rather abundant. " " 11 " 
*-228.Deep purple .Creeping " 
•"229.35 cm.Sandy dry arroyas 
*-''830.40 cm. " " " 
-"331.Yellow 25 cm.” » 
it 
Not abundant 
Rather abundant 
Not abundant 
It It 
!1 II 
Rather abundant 
285)Blue 35 cm.Banks dry arroya.Not " 
Rather abundant 
it ii 
Not abundant 
Rather abundant 
n it 
Not 
it 
abundant 
it 
Not 
ti 
bundant 
it 
0- 
'7 vuxT, ‘^32 Vining Open dry hillsides 
-233. " Banks dry arroyas 
I L'l 50 Cm * Hillsides 
a »-236.Pink 20 cm.Gypsumbed 
.Yellow 50 cm.Gypsum bed 
•"238. 15 cm. Dry hillside 
N *-239.White 30 cm.Sandy arroyas 
^^^40.Purple 30 cm. Hillsides 
-241.Pink.20 cm. " 
'-4:42.Lavender 25 cm. ,” 
<543. 25 cm. Banks dry arroya 
T244. Vining " " " 
^ 245 .Blue ” " " 
46 . 60 cm. " " « 
»-'247.LavenderSE5HillsidesI.5 M. 
*Note.^umbers 226 through 247 were collected October 9,1940. 
•''24137White Dry hillside Rare 
^249. 15 cm. ” n Not abundant. 
-250. White " " Rare® 
U ^ • 1-251.Yellow 25 cm." Not abundant. 
-252. 25 cm. Sides arroyas Rather abundant 
<253.Yellow 35 cm. Dry hillsides Not abundant 
-254.Yellow 45 cm. " Abundant 
*'255. 40 cm. n ff ' ” 
I -*-* -oD bellow. 30 cm. " ” Not abundant 
l^/t£*RU>-- 257 . Vining Dry sandy arroyas " _ . " , . 
' - 258 .Purple Creeping.Arroyas and hillsides Abundant 
Sandy arroyas Not abundant 
k- 260. White Creeping " ” n 
1/ 
Rather abundant 
it it 
I! tt 
km.N.W.Sta.Elena / 
tt , 
it ( 
tt tt 
it n 
'X " 
II I! II 
’ll 
