20 MOLLI881MI. 



Densely tufted perennials of dry plains, mostly with scapose 

 peduncles, with pods nearly "^-celled except at tip, with walls ra- 

 ther fleshy to coriaceous, pods inclined to be somewhat inflated, 

 witli cross-section cylindrical to a little obcompressed, rather sul- 

 cate ventrally,m(.8tly straight, oval to oblong or rarely broadly 

 linear, never very small, never reflexed, sessile, mostly felted- or 

 shaggy-pubescent. Flowers spicate, mostly cream-colored, rarely 

 red, large. Peilicels almost none. Pubescence attached by the base, 

 mostly shaggy oi' felted and inclined to turn yellowish in age. 

 Leaven narrow and with many flat and rather thick leaflets. A. 

 anisus has broad leaflets and hairs fixed by the middle. 



KEY 



A. Pods ovate to cylindrical or linear, mostly narrow. 



AB. Pods shaggy or velvety, rather thin-coriaceous, seldom in- 

 flated, conspicuously oblique or arcuate, sulcate at both sutures, 

 with truncate to cordate base. Leaves with rather large 

 leaflets which are almost never acute, narrow nor obovate. 

 Pubescence of kinky and jointed hairs which are appressed 

 except on the calyx of A. Bigelovii. 

 ABC. Calyx loosely shaggy. 



IS8 Bigelovii- 

 AB2C. Calyx closely appressed-hairy. Pods straight, dense- 

 ly hairy, with sides even and straight. 



189 Phcenicis. 

 AB3C. Pods, calyx and leaves with close and felted pubescence 

 of tangled hairs, pods with uneven sides. Leaflets in- 

 clined to b" acute. Flowers narrow. Bracts short. 

 This group blooms early and continues till fall accor- 

 ding to the rains. 



190 Humliokhii. 

 A2B. Pods smooth, ascending, slightly corrugated, cartilag- 

 inous, obcompressed, inclined to be sulcate at both sutures, 

 arcuate or oblique, 1-2 cm. long. Flowers 2-3 cm. long, 

 mostly greenish-yellow, spicate, about horizontal or even 

 reflexed, but nearly erect in fruit, many, not conspicucusly 

 stubby. Calyx teeth subulate and about half as long as 

 tube. Leaflets of rather many pairs, large. Stems ascen- 

 ding to erect, often tall. Pubescence fine, tangled and 

 rather dense. 



Pods nearly linear, not inflated. Flowers purple. 191 mollissimus. 



Pods broad and inflated. Flowers ochroleucous. 192 giganteus. 



2A. Pods conspicuously inflated, nearly globose. 



2AB. Pods straight or a little arcuate, ovate to globose, large, 

 scantily pubescent, with rugose sides. Pubescence of 

 calyx short and felted. 



193 Orizabae 

 2A2B. Pods about globose, 1.5-4 cm. long, rounded and apicu- 

 late at tip, with a minute boss at base, minutely pubescent. 

 Pod.; 1.5 cm. long. Small plants, with 3-6 pairs of small Icatkts, 



Pubescence attached by the middle. 194 anisus 



Pods 3.5 cm. long. Large plants, with 12-15 P^i'S of large 



leaflets. Hairs attached by the base. 195 orthanthus 



