273 Micranthi. 



Pods linear-oljlong, i cm. long, 3 mm. high, 4 mm. wide. 251 Schaffneii. 

 2A3B. Flowers broad, rather many in dense heads, rarely 10 

 mnn. long. Calyx campanulate, 1-3 mm. long. Peduncles 

 axillary. Stems decumbent or prostrate. 

 2A3BC. Leaflets about 1 cm. long, appearing narrow. Flowers 

 white, 4-7 mm. long (8-10 mm. long in A. Esperanzae). 

 Peduncles shorter than the leaves, slender. Calyx equally 

 inserted, not oblique, nearly hemispherical. Leaves spread- 

 ing. Leaflets folded. Stems slender, with many leaves 

 and short internodes. 

 Peduncles shorter than the leaves. Podt. about 7 mm. long 



252 Lemmoni, 

 Peduncles not shorter than the leaves. Pods about i cm. long. 

 Stipules -connate, large. 253 Esperanzae. 



St.pules free and small. 254 Chapalanus. 



2A3B2C. Leaflets broad, about 5 mm. long. Flowers purple- 

 tipped, about 5 mm. long. Peduncles filiform, much longer 

 than the leaves. Stems prostrate and short. 

 Peduncles much longer than the leaves Pods linear-oblong, 



I cm. long, 255 hypoxylus. 



2A3B3C. Leaflets 3-5 mm. long. Flowers purple 4-5 mm. 



long. Peduncles filiform, about as long as leaves. Calyx 



turbinate-campanulate, 1 mm. long, the teeth shorter than 



the tube. Stems slender, 2-4 dm. long. 



A. Purpusi might be soug-ht here, but has a stipitate pod. 

 3A. Flowers very many, in spikes which are mostly dense but some- 

 times linear, elongated and loose. The plants of this group are 

 mostly Mexican and the specific limitations are merely tenta- 

 tive till the species are better known. 

 SAB. Pods sessile (minutely stipitate in A. Hartwegi, Saltonis 

 and Seatoni) rigid, reflexed, 1-1.5 cm. long, linear, triangular- 

 acute, a little arched. 

 3ABC. Pubescence fine and attached by the base. 



3ABCD. Flow^ers about 8 mm. long. Pods loosely pubescent 

 and rather nigrescent. 



Pods reniform in cross-section and loosely pubescent. 



256 Hartwegi 

 Pods triquetrous-cordate and smooth. 257 militaris 



Pods deltoid in cross-section and nigrescent. 258 Saltonis 



3ABC2D. Flowers about 4 mnre. long, very densely clustered. 

 Pods closely reflexed, linear-lanceolate, acuminate, 

 sharply arcuate belov.^ about 1 cm. long, 1-1.5 mm. 

 high and 1.5-2 mmi. wide. Leaflets nearly linear. 

 Pods pul.iescent. Flowers short and stubby. 259 vaccarum. 



3AB2C. Pubescence very fine and attached by the middle. 

 Plants silvery-silky. Stipules large, hyaline and connate. 

 Stems procumbent. 

 Pods linear and closely reflexed. 260 hypoleucus- 



3A2B. Pods not linear, ovate to oval, but little longer than 

 calyx, not over 7 mm. long, closely reflexed in narrow spikes. 

 Flowers small or minute. 

 3A2BC. Pods in short spikes. Peduncles filiform. Stipules 

 triangular, not connate. 

 Pods 7 mm long, smooth. 261 oxyrhynchus. 



Pods 4 mm. long, nigrescent. 262 Seatoni, 



3A2B2C. Pods in long and linear spikes. Flowers white, wide. 

 Calyx about 2 mm. long. Leaflets 8-10 pairs. Stipules not 

 connate. 

 Pods ashy. 263 Goldmani. 



Pod smooth. 264 Clevelandi. 



