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The mountain of Sierra Mojada andthe Sierra Planchada are located in 
western Coahuila about 10 kilometers from the Chihuahua line and more 
or less midway from the northern to the southern extremity of the state. 
Sierra Mojada forms the southern limb of an anticline with the Sierra 
Planc&ada forming the northern limb.?ft#*£:ftt£*tH4f£h Along the axis which runs 
from east to west erosion has ifiade the valley fib of Sierra Mojada.The 
valley is ten kilometers long fron east to west with a width of 2-4 kilometers, 
The altitude of the valley at Esmeralda is approximately 1400 meters.The crest 
of the Sierra Mojada is about 2000 meters with the crest of the Sierra plan¬ 
chada around 1700 meters.The Sierra $|ojada has almost vertical wralls ef with 
a height of over 300 meters.The Sierra Planchada has more gradual slopes 
rising to the crest.Both mountains are composed of cretaceous limestone,though 
a small hill of granite outcrops in the valley floor. 
8/2/4I-I006 Light red erect open hillsides not common North endSierra Planchada 
” 1507 Espuelita blue erect toboso flat Fairly common ” ” 
” 1008 Yellow prostrate Not commmon Toboso flat ” ” 
" 1009 Lavender erect Toboso flat not common " ” 
" 1010 Romerillo Yellow shrub Im.Dry open hillsides Common” 
1011 White erect dry open hillside fairly common ” 
1012 Inmortal red prostrate Toboso flat fairly common ” 
1013 Escobilla erect ")oboso flat fairly coramom ” ” 
1014 White erect 30-45 cms. Toboso flat not common ” ” 
1015 Costilla de Vaca shrub 1.5 M. Toboso flat common” ” 
1016 White Toboso flat not common ” ” 
Sierra Planchad? 
8/4/41 1017 Yellow 50-60 cms. open hillside fairly commonMouth Canyon del Gringo 
” 1018 Ortigilla rocky arroya not common ” 
" 1019 ” 
Yellow rocky arroya Not common 
” 1020 White erect rocky arroya fairly common ” 
” 1021 Pegaropa orange erect dry hillside fairly common 
” . 1022 Menta erect dry rocky arroya fairly common ” 
” 1023 Yellow dry rocky arroya not common 
/” 1024 Greenish vining dry rocky arroya not common 1 ” 
1025 Encino shrub 2-4 M.bank dry arroya common £ ” 
1026 Vining on shrubs ” ” ” fairly common 2 ” 
1027 Huahillo 1-3 M .bank dry arroya common- 2 ” 
1028 ^ellow erect 30-50 cms. dry rocky arroya common 3 ” 
1029 Yellow 60-cm.-T M. dry rocky arroya common 3 ” 
1030 Encino 4-6 M.shrub bank dry arroya common 3 " 
