378 
Journal of Agricultural Research 
Vol. I, No. 5 
PERENNIAL species op the sagebrush association 1 
Common or frequent 
Agropyron spicatum (Pursh) Rydb. 
Eriocoma cuspidata Nutt. 
Poa sandbergii Vasey 
Sitanion jubatum J. G. Smith 
Zygadenus paniculatus Wats. 
Eriogonum ovalifolium Nutt. 
Opuntia sp. 
Malvastrum coccineum (Pursh) Gray 
Phlox longifolia Nutt. 
Castilleja linariaefolia Benth. 
Artemisia tridentata Nutt. 
Chrysothamnus marianus Rydb. 
Chrysothamnus nauseosusalbicaulis (Nutt.) 
Rydb. 
Chrysothamnus pumilus Nutt. 
Erigeron pumilus Nutt. 
Guiierrezia saroihrae (Pursh) B. and R. 
Senecio uiniahensis A. Nels. 
Less frequent or rare 
Stipa comata Trin. and Rupr. 
Atrip lex canescens (Pursh) James 
Delphinium burkei Greene 
Cowania stansburiana Torr. 
Astragalus arietinus Jones 
Astragalus beckwitkii T. and G. 
Astragalus utahensis T. and G. 
Anogra pallida (Lindl.) Brit. 
Gaura parviflora Dougl. 
Pachylophus marginatus (Nutt.) Rydb. 
Lappula caerulescens Rydb. 
Lappula occidentalis (Wats.) Greene 
Thalesiafasciculata (Nutt.) Brit. 
Antennaria dimorpha (Nutt.) T, and G. 
Balsamorrhiza hirsuta Nutt. 
Balsamorrhiza sagittata (Pursh) Nutt. 
Chaenactis douglasii H. and A. 
Chrysopsis villosa (Pursh) Nutt. 
Crepis occidentals Nutt. 
Layia glandulosa H. and A. 
Leucelene ericoides (Torr.) Greene 
Ptilocalais nutans (Geyer) Greene 
Tetradymia inermis Nutt. 
Numerous annual and biennial plants occur in this association. By 
far the most abundant of these are two introduced species, Bromus iectorum 
and alfilaria (.Erodium cicutarium ), which in many places cover the 
ground among the “sage” bushes with a dense mat of vegetation. The 
more abundant or otherwise conspicuous annual and biennial plants of 
the sagebrush association are given in the following list: 
ANNUAL AND BIENNIAL SPECIES OF THE SAGEBRUSH ASSOCIATION 
Bromus iectorum L. 
Festuca octoflora hiriella Piper 
Arabis longirostris Wats. 
Draba sp. 
Sophia filipes (Gray) Heller 
Sophia pinnata (Walt.) Brit. 
Erodium cicutarium L’Her. 
Mentzelia dispersa (Wats.) A. Nels. 
Mentzelia laevicaulis (Dougl.) T. and G. 
Anogra albicaulis (Pursh) Brit. 
Phacelia linearis (Pursh) Holz. 
Cryptanihe sp. 
Lappula cupulata (Gray) Rydb. 
Lappula subdecumbens (Parry) Nels. 
Amsinckia tessellata Gray 
Appearance 
The characteristic appearance of the sagebrush association is illus¬ 
trated in Plate XLIV, figure i. During the early summer, when their 
maximum growth is taking place, the sagebrush plants present a silvery 
1 la this and all following lists of species the families are arranged in the sequence of Engler and Prantl 
(Die Natiirlichen Pflanzenfamilien), while the genera are arranged alphabetically under each family. 
