The Trees of Texas 39 
A western mountain form extending from Montana and 
British Columbia to California and Mexico, eastward to Ne- 
braska and Western Texas. In Texas, it reaches the Guada- 
lupe and Limpia Mountains, and extends northward. 
ear 
. : bata 

Pio AS Pinus echinata. 
Pinus ponderosa grows in a wide variety of habitats. It 
is at home on the moist fertile mountain slopes and plateaus, 
dry ov rocky ridges, fertile gravelly valleys, and arid desert 
slopes. It reaches its maximum size and abundance in the 
yellow pine belt of the Sierra Nevada. 
The trees of our area are small and of comparatively little 
value. The wocd is classed with the yellow pines. It is soft 
