H«ino*i. 254 



i dm. long, longer than the Ie?,ves. Leaflets obovate to oblong- 



ovate, rarely linear. Stems branched from the base or acau- 

 lescent. Pubescence hoary, of flat and appressed hairs at- 

 tached by the middle. Stipules triangular and small, not con- 

 nate. Species closely allied to Oxytropis. Oxytropidoides. 



r<)(ls acuminate. Stems lonj; and prostratL. 218 Ari/oniciis. 



Toils not acuminate. Stems almost none. 219 calycosus_ 



2A. Pods stipitate or reflexed. Pubescence attached by the base. 



2AB. Pods erect on a stipe shorter than the ca!vx and jointed to 



it, triquetrous, with concavo sides, linear, 2-5 cm. long, 2-3 



i mm. high, acute at both ends, slighily larger toward the tip, 



smooth, with cross-section Y-shaped. Flo^wers ascending, 



few and racemose. Banner oval, 5-6 mm. long, abruptly 



arched at calyx tips to erect or more. Wings about linear. 



I Keel blunt. Bracts minute. Peduncles shorter than the leaves. 



I Leaflets thick, flat, distant. Calyx spreading to horizontal in 



fruit. Pubescence ashy and closely appressed when present. 



Stems rather rush-like and round, colored like the leaves. 



Hairs short, fiat, white but inclined to be dark on the calyx. 



i Plants of the Californian deserts. Orcuttiani. 



Leaflets about 4 pairs. 220 Bernardinus- 



Leaflets about 15 pairs. 221 tricarinatus- 



2A2B. Pods deeply sulcate dorsally, generally obcompressed be- 

 low, and much arcuate, chartaceous barely wider above, 

 about 2-3 cm. long and 2 mm. high, smooth, on stout stipe 

 shorter than calyx and not jointed to it, cross section rather 

 deltoid or oblately so, with the same peculiar, stubby, de- 

 clined tip as in A. Drummondii. Leafiets about 12 pairs, 

 gradually smaller above, distant, nearly round, on very short 

 I petioles and with long and tapering leaf-rachis. Tropical. 



Pods with concave sides, and flowers about 7 mm. long. 222 OrcutlianMS. 



2A3B. Pods reflexed (apparently ascending in the A. Nevinii 



group or at least indifferently spreading), triquetrous in 



cross-section, never straight. 



2A3BC. Pods not stipitate, jointed to calyx, linear, much ar- 



i^ cuate. Flowers small. 



Pods arched to a half circle. 223 drepanolobus- 



F 2A3B2C. Pods stipitate (minutely so in A. Congdoni and An- 

 ^ dersoni). 



If- 2A3B2CD. Pods jointed to a stipe which is shorter than 



tthe calyx, linear to narrowly oblong. 

 2A3B2CDE. Whole r«lfint softly silky, even the pods pu- 

 fi^ bescent. Pods with cordate cross-section, slightly sul- 



|i- cate dorsally. Flowers white or whitish, with clon- 



al gated banner 1-1.5 cm. long. Calyx tube about 4 mm. 



a* long, rather truncate below and inserted on the cor- 



^; ner, cleft deeper above and oblique. Leaflets ellipti- 



P cal and apiculate. Pubescence of very fine, long, 



^ twisted or wavy, nearly smooth hairs. 



Pod closely reflexed. 224 Concidoni. 



Pods not closely rellexed. 225 Andersoni. 



■3^; 2A3B2CD2E. Whole plant smooth or nearly so including 



j^ the shiny pods. Flowers small. 



Pods arched to a half circle. 226 sylvaticus- 



W': 2A3B2CD3E. Pods shortly appressed-pubescent, tapering 



gr into a short stipe, with broad cross-section. Leaves 



I silvery-hoary with short and appressed hairs. Flowers 



^ small. 



I'ods arched nearly to a circle. 227 albens* 



