252 Part III. Chapter 3. 
*Ptelea angustifolia Benth. through Colorado, Mexico and Texas. 
Prunus capsuli Cav. (=P. capollin Zucc.). Through Arizona, New Mexico, 
western Texas. | 
Quercus Emoryi Torr. Southern New Mexico, Arizona, western Texas. 
*Quercus hypoleuca Engelm. High mountain ranges southwestern New 
Mexico, Santa Rita Mountains, southeastern Arizona, Sonora. | 
*Quercus oblongifolia Torr. Soitkeiti Arizona, New Mexico, Mexico. 
Sophora secundiflora Lagasca. New Mexico to Gulf coast of Texas. 
*Ungnadia speciosa Endl. New Mexico (western Texas and northern Mexic 
*Yucca elata Engelm. Western Texas, to Utah, Mexico. 
B. Artemisia tridentata Nutt. Colorado to southwest, Bitterroofs. 
Baccharis salicina Torr. & Gray. Colorado to Texas. 
Berberis Fendleri Gray. Southern Colorado southward, westward 
Southern California. 
Eupatorium ageratifolium DC. Southern Colorado to Texas. 
Juniperus monosperma Engelm. Colorado and California. 
Larrea mexicana Moric. Southern Colorado to California also in Texas 
Pinus aristata Engelm. Colorado and Death Valley Region. 
Pinus edulis Engelm. Southern Colorado, New Mexico, western Texas. 
Populus Fremontii Wats. var. Wislizeni Wats. Southern Colorado, N 
Mexico, western Texas, Arizona, Southern California. 
Purshia tridentata DC. Rocky Mountains, Arizona, to Southern Californ! 
*CJuercus grisea Liebm. Southern Colorsdsi Southern New Mexico, W 
ward through Southern Arizona, California, N. Mexico. 
*Robinia neo-mexicana Gray. Southern Colorado, southwestern and west 
New Mexico, Arizona, Southern Utah. 
Rhus trilobata Nutt. Colorado and southwest to southern California. 
*Yucca baccata Torr. New Mexico to southern Colorado, westward 
Southern California, southward into northern Mexico. 
C. Abies concolor Lindl. and Gord. New Mexico, southern California 
regon, Colorado. S- 
Cercocarpus ledifolius Nutt. .Arizona, New Mexico, western Montana, Idaho 
and on Pacific coast Southern California to Washington. Es 
Cercocarpus parvifolius Nutt. Arizona, New Mexico, Wyoming; also en 
California. z 
. Holodiscus discolor Maxim. New Mexico, Colorado, Bitterroot Mountains | 
Pacific coast. 
Juglans rupestris Engelm. Southern New Mexico, western Texas, Arion, 
Pacific coast to central California. 
Peraphyllum ramosissimum Nutt. Southwestern Colorado, Utah, California 
and Oregon. 
Rhamnus ER Esch. Southwestern Colorado, New Mexico, California 
and north to the valley of the upper Sacramento. 
Ribes lepanthum Gray. Colorado, New Mexico, sierras of California. 
