66 



COMPOSITiE. 



Coleosanthiis microphyllus Kuiitze. — A small plant from a woody haso, from 

 Avhitli arise iniiiieroiis strict, slendor branches, "> to 1(» inches hijjh; tlie small 

 leaves very numerous. Only a few S2)ecimens noted. The (^ip, July 25 (3594). 



Chrysothamiuis coUinus Greene (Hillside Rahiut-hkush). — A .snail, mueh 

 branched shrub, les.s than a foot hi.nh, stems and leaves yellowish-green. Eaten 

 by sheej) as a last resort. I'oiut of liock.s, August 30 (4435). 



Clnysotaamuu.s linifolius Greene (Crkkk-hank R.\iujit-1!RUSii). — A slender, wil- 

 lowy shrub, 2 to 3 feet, with bright-green linear-lanceolate leaves. It was 

 ob8er\ed only on the immediate banks of the strongly saline creeks, where it 

 was very abundant. Granger, .July 3(t (4137): Rock Sjiriugs, July 30 (4143); 

 Point of Kocks, August 30 (4440). 



Chrysothamniis puni\lii.s Nutt. ( ?). — A small shrub with shreddy bark, the new 

 branclus being light-colored or almost white, stems and leaves glabrous, 

 branched and si)reading, but rarely more than 12 to 18 inches high. Wamsutter, 

 July 11 (3524). 



Chrysothamniis specio.sus Nult. ( ?). — A rather stout, branched shrub. 3 feet or 



more in luMght, the new twigs slender, green or yellowish, bearing nunieious 



long linear leaves. Differing from the other Rabbit-brushes of the region in 



that it does not form close clumjjs. but grows as single, conspicuous shrubs, 



branched above, thus simulating in habit a miniature tree. C'reston, August 2S 

 (4419). 



Chrysothamniis stenophyllus fireene. — A small shrnb, the older branches s])read- 

 ing, the younger sonunvhat fascicled and erect, white. It piefers sandy slopes 

 and ridges. Point of Rocks, August 30 (4434). The forage value of the Rablut- 

 brushes is Aery small. Sheep men say that in emergencies sbeei> ^^''^' crop the 

 young branches and lea\'es, but that they leave this forage as soon as other fe.-d 

 is at hand. 



Stenotus acaulis Nutt. — A ]i]ant with iiuiiH^rous naked stems each bearing a lai'ge 

 head of yellow liowtsrs. Lca\es from the woody base slender and very numer- 

 ous. Common on the clay and shaly slopes ; Green River, May 30 (3022). 



Petradoria puniila Greene. — Some seemingly nearly typical plants were secured at 

 South Butte, July 13 (.3551). 



Townseiidia strigosa Nutt. — Abundant on the white bliilfs about Green River, 

 May 30(3031). 



Aster adscendens Lindl. — The nearly simple, wand-like stems al)out a foot high, 

 usually growing in chimj>s. Rare in the; desert, only observed on the slopes 

 below the winter snowdrifts. South ibitte, .Inly 13 (3.553). 



Machaeranthera sessiliflora (ireeno. — Infrequent. Cre.stou, August 28 (4271). 



Xylorrhiza pairyi (ireene. — Very abundant on clay slopes throughout the desert. 

 K'.'d Desert. ,hine 3 (3123). 



Erigeron condensatus (ireene. — A small, sjireading form, abundant in the hills near 

 Point of Rocks, .luiie 1 (3088). 



Erigeron subtrineivis liydh. — Occasionally in the thickets below the winter snow- 

 drifts on the stee])er slopes. South iJutte, .luly 13 (3539). 



Gnaphaliiim palustre Nutt. — A small sjjreading herb, scarcely 2 inches high; usu- 

 ally f<Mind in old biillalo wallows or in the loose soil of ditch banks. Creston, 

 August 2!) (1271). 



Iva axillaris Pnrsh. — A w(!e<l-like plant, br.-mching freely and becoming (i to 9 

 inclies high. Il is \-4-ry alinndant on the lov, liauks of iiitter Creek. .Inly 12 

 (3.525 J. 



Balsamorhiza hirsuta Nutt. — ^'ery rare, oiil.\ a lew plants secured. South J5iitte, 

 .luly 13(3.5.52). 



Hynienopappus luteus Nutt. — A very tomentoseform, much branched, 3 to 6 inches 

 high, was secured on the bluffs at Green River, May 31 (3051). 



