Apr. i2,1924 Vegetation in the Semiarid Portion of the United States 121 
Poor to Worthless Types Carrying 
capacity 
(36) Hilaria rigida _ 5-10 
(25) Matchweed_ 5-10 
(84) Desert-sage- 10— 
(51) Scab sagebrush_ 5—10 
(69) Creosotebush_ 0-10 
(86) Black brush_ 0-10 
(75) Creosotebush and cacti_ 0-10 
(70) Creosotebush and bur-sage_ 0-10 
Little or No Grazing Value 
Cr eosotebush-ocotillo. 
Giant cactus and bur-sage. 
Parosela arborescens and Lepido - 
spartum squamatum. 
Pluchea. 
Atriplex lentiformis. 
TYPES OF VEGETATION GROUPED BY REGION 
The following is a list of the types of vegetation, giving their distribution in 
the regions outlined on the key map of the vegetation regions. The regions 
listed are believed to include practically the entire range for a large percentage of 
the types. A few, however, may extend to a limited extent into adjoining regions. 
Type Regions 
(1) Grama grass ( Bouteloua gracilis) __ 1, 2, 3, 7, 8 
(2) Grama grass and wheatgrass ( Agropyron smithii) _ 1, 2, 7 
(3) Grama grass and niggerwool (Carex filifolia) _ 1, 2, 5, 7 
(4) Grama grass, niggerwool, and Junegrass ( Koeleria cristata) _ 1, 2, 7 
(5) Grama grass and mountain sage {Artemisia frigida) _ 1, 2* 
(6) Grama grass, niggerwool, and sagebrush {Artemisia tridentata) _* 1, 5 
(7) Grama grass and sagebrush-3, 5, 7 
(8) Grama grass and chamiso {Atriplex canescens) _ 1, 2, 3, 5, 7 
(9) Grama grass and wild alfalfa {Psoralea tenuiflora) - 1, 2 
(10) Grama grass and matchweed {Gutierrezia sarothrae) _1, 2, 3, 5, 7 
(11) Grama grass and valley sage {Artemisia nana) _ 1 
(12) Grama grass and western needlegrass {Stipa comata) - 1 
(13) Grama-buffalo grass ( Bulbilis dactyloides) _ 1, 2 
(14) Grama-buffalo grass and western needlegrass-- 1, 2 
(15) Grama-buffalo grass and wire needlegrass {Aristida longiseta) - 2 
(16) Grama-buffalo and wheatgrass_ 1,2 
(17) Grama-buffalo and wild alfalfa___ 1,2 
(18) Grama-buffalo grass and soapweed yucca {Yucca glauca) - 2 
(19) Grama-buffalo and mesquite {Prosopis glandulosa) - 2 
(20) Grama-buffalo grass and matchweed_ 1, 2 
(21) Wheatgrass_ 1 
(22) Wire needlegrass_2, 7, 8 
(23) Niggerwool_ 1,5 
(24) Western needlegrass_ 1, 2 
(25) Matchweed-- 1, 2, 3, 7, 8 
(26) Matchweed and mountain sage {Artemisia }rigida) - 1 
(27) Black grama {Bouteloua eriopoda) _ 8 
(28) Hairy grama {Bouteloua hirsuta) y grama, and sand sage {Artemisia 
filifolia) _ 2 
(29) Bunchgrass {Andropogon scoparius) _ 1, 2 
(30) Sand hills mixed_ 1,2 
(59) White sage. 
(60) Coleogyne. 
(66) Pickleweed. 
(67) Seep weed. 
(68) Samphire. 
(71) Encelia and California sagebrush. 
(72) Shrub buckwheat. 
(76) 
(77) 
(81) 
(82) 
(83) 
