Micranthi. 282 



flexed, obliquely ovate to half-oval, thin, shortly acute at both ends, 

 conspicuously flattened laterally, with triquetrous-cordate cross sec- 

 tion, 4-5 mm. long, 2 mm. high, minutely appressed-pubescent, 

 rather strongly nerved, triangular-apiculate, ventral suture slightly 

 arched and raised, dorsal suture sulcate to the middle, then pro- 

 duced to the ventral as a partition below. Flowers purple, about 

 4 mm. long, in dense heads which become short spikes in fruit, 

 many (10-15), spreading and soon reflexed. Banner obovate, about 

 2 mm. long, abruptly arched at calyx tips to erect, purple and dark- 

 striped, slightly longer than the wings. Wings broadly linear, 

 nearly straight, blunt, white or purple, about V2 mm. longer than 

 keel. Keel vei'y broad, straight, about 2 mm. long and high, 

 rounded to about a half circle, the tip erect. Calyx obconic, equally 

 inserted, about 1 mm. long, appressed-black-hairy, teeth triangular, 

 nearly equal, half as long as tube. Bi-acts ovate, hyaline, 1 " mm. 

 long, about as long as the fruiting pedicels. Peduncles filiform, 

 in the upper axils, 2-3 cm. long. Leaves 2-3 cm. long, spreading, 

 all nearly sessile, a little longer than the internodes, with filiform 

 rachis. Leaflets about 10 pairs, notched, oval-obovate to oblanceo- 

 late, thickish, mostly folded, nearly contiguous, smooth above, 

 sparsely and minutely pubescent below, the broader ones 2 mm. 

 long, the others 4 mm. long and 1.5-2 mm. wide. Stipules con- 

 spicuous, hyaline below, connate, the lower ones quadrangular and 

 ti'uncate, the upper deltoid, about 3-5 mm. long. Stems very many 

 and woody below, prostrate and csespitose, branched, flexuous, 

 rather stout for the plant, hardly a foot long. Plants with the 

 habit of A. tegetarioides, and montanus. Sierra de Parras, Coahuila, 

 Mexico, at 9,000 ft. alt. Middle Temperate life zone. No. 4582 

 Purpus. 



