69 



3A3B2C. Leaflets digitate and mostly a single pair, oblanceolate 

 and apiculate, never minute. Stems caespitose often a mere 

 crown, always with overlapping stipules whch are very shaggy 

 with long hairs. Flowers purple. Plants blooming early. 

 21 sericoleucus. 



3A4B. Stems casspitose, very many, prostrate, very slend.^r with 

 internodes much longer than the large and not connate Stipules. 

 Flowers white, small in axillary heads. Pods oval-ovate, about 

 4 mm. long. Leaflets very small and nearly round. 

 22 tegetarioides. 

 3A5B. Slender plants, apparently winter annuals, with ascending 

 to prostrate stems a few inches long from the crown of a slender 

 root. Flowers racemose, few. Pods chartaceous, a little 

 inflated about 7 mm. long, with ventral suture conspicuously 

 arched and dorsal straight. Leaflets linear. Peduncles elon- 

 gated . It is possible that this belongs in the Inflati, but at 

 present I place it here. 



23 quinqueflorus. 



1. Astragalus Wingatensis Watson Proc. Am. Acad. 18 192(1888) 

 Homalobus Rydberg. Pods straight, but oblique, narrowly oblong, flat • 

 in the type, about 15 mm, long and 3 mm. high, smooth and inclined 

 to be mottled, the dorsal suture only a little convex and the declined 

 tip nearly in line with it, seeds 3 or more maturing. Flowers 10-20 

 in a long and very open raceme, erect or spreading, 5-7 mm. long. 

 F3anner abruptly arched at calyx tips to 45 to 100 degrees, 

 3-4 mm. long and 3 mm. wide, about 2-4 mm. longer than keel, 

 broadly ovate to oval deeply notched, purple-veined. Wings oblong. 

 3-4 mm. long, entire, about about 2 mm. longer than keel and ap- 

 pearing as if as long as banner by its being arched back, ascending 

 or much arched, flat to keel. Keel very blunt, the tip much incurved 

 and rounded, purple-tipped, surpassing the calyx teeth by about 2 

 mm. the tip oval, about 2 mm. wide, base straight. Calyx nigres- 

 cent, tube about 2 mm. long and the teeth about 1 mm. long and 

 broadly triangular to filiform and about equal. Pedicels 1-3 mm. 

 long, slender. Bracts small but evident, persistent, hyaline. Pedun- 

 cles grooved, subterminal, 7-14 cm. long or more including the rachia 

 which is about 2-3 times the whole, longer than the leaves, filiform and 

 tapering, erect. Leaves never sessile, 2.5-7 cm. long. Leaflets 3-6 

 pairs, distant, on small plants 4-10 mm. long, on larger ones 2-3 

 cm. long, elliptical to linear, distant, truncate to notched, mostly 

 folded and rather thick. Stipules with the free tips triangular in 

 the upper axils. Stems widely spreading and not densely branched, 

 often 2 ft. long, from a thick woody root, several, sparsely leafy. 

 Whole plant except the pods minutely pubescent, the hairs very wide, 

 warty, flat, sparse. From Mounds Utah to Glenwood Springs Colo- 

 rado and southward in the Navajo Basin to Fort Wingate New Mex- 

 ico. It blooms in May, and grows on open and dry rocky slopes 

 and ledges among the junipers. Lower Temperate life zone. 



Astragalus Wingatensis van. Dodgeanus (Jones Zoe 3 289 (1893) 

 as species). A. ncevbus Sheldon and A. nroximus Rydberg, Homalo- 

 bus dementis Rvdberg. This la a stiintate-podded, form, often 

 nearly round in cross section, and with flowers about 5 mm. lone 

 and white. The leaflets mostly lir^av to mdmentary .ind stems 

 very slender. From Thompson's STr'ngs Utah to Glenwood Springs. 

 and Salida Colorado. Same life zone. 



2. Astragalus tenellus Pursh Fl. 473 (1814). A. multiflorus 

 (Pursh) Cray. Ervum multiflorum Purs>i. Tragacantha Knntze, 

 Orobus dispar Nutt. Phaca nigrescens Hook., A. nlgrescens (Hook.) 



