May 24,1924 Significance of the Southwestern Desert Vegetation 
731 
In so far as possible the common names of plants are used throughout the 
text. However, in the discussion of each association under the paragraph head¬ 
ing, “ Botanical Composition,” a list of the plants noted is given with the botanical 
names in full. The following list gives the common names used in the text, 
together with the botanical names: 
Annual fescue.. 
Arrowweed_ 
Bur-sage_ 
Chamiso_ 
Creosote bush_ 
Desert plantain_ 
Desert-sage_ 
Desert-willow_ 
Giant cactus_ 
Greasewood_ 
Mesquite_ 
Narrowleaf saltbush.. 
Paloverde_ 
Pickleweed_ 
Sagebrush__ 
Saltbush_ 
Saltgrass... 
Seepweed-- 
Do_ 
Shadscale. __ 
Washington palm_ 
Yellow pine_ 
Festuca octofllora Walt. 
Pluchea sericea (Nutt.) Coville. 
Franseria dumosa A. Gray. 
Atriplex canescens (Pursh) Nutt. 
Covillea glutinosa (Engelm.) Rydb. 
Plantago erecta Morris. 
Atriplex polycarpa (Torr.) S. Wats. 
Chilopsis linearis (Cav.) Sweet. 
Carnegiea gigantea (Engelm.) Britton & Rose. 
Sarcobatus vermiculatus (Hook.) Torr. 
Prosopis glandulosa Torr. 
Atriplex linearis S. Wats. 
Cerddium torreyanum (S. Wats.) Sarg. 
Allenrolfea ocddentalis (S. Wats.) Kuntze. 
Artemisia tridentata Nutt. 
Atriplex lentiformis (Torr.) S. Wats. 
Distichlis spicata (L.) Greene. 
Dondia torreyana (S. Wats.) Standi. (Coach¬ 
ella Valley). 
Dondia intermedia (S. Wats.) Heller (Gila 
Valley). 
Atriplex confertifolia (Torr.) S. Wats. 
Washingtonia filifera Wendl. 
Pinus ponderosa Laws. 
YUCCA AND CACTUS ASSOCIATION 
The lower mountains surrounding the Coachella Valley are covered only with 
low shrubby desert growth. On the north side of the valley the hills are of clay 
or silt texture and weather down rapidly to form bad lands (PI. 1, A). The vege¬ 
tation on this loose cracked clay soil probably represents only successional phases, 
and is very sparse. It consists of the following species: 
Atriplex hymenelytra (Torr.) S. Wats. Erigonum thomasii Torr. 
Plantago erecta Morris. Monoptilon bellioides (A. Gray) Hall. 
Calyptridium monandrum Nutt. Lotus strigosus (Nutt.) Greene. 
Chamaesyce melanadenia (Torr.) Millsp. Cryptanthe sp. 
At a short distance the low mountains and hills appear entirely bare, but 
except where bad lands occur they are characterized by the Yucca and cactus 
association (PI. 1, B). The following are the more important species: 
Yucca mohavensis Sarg. 
Ferocactus acanthodes (Lemaire) Brit¬ 
ton & Rose. 
Opuntia bigelovii Engelm. 
Encelia farinosa A. Gray. 
Franseria dumosa A. Gray. 
Ephedra californica S. Wats. 
Eriogonum fasdculatum Benth. 
Krameria grayi Rose & Painter. 
Antirrhinum coulterianum Benth 
Eriodictyon tomentosum Benth. 
Fouquieria splendens Englem. 
