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 % mm. longer than 
keel. Keel very 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. Bracts 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 
truncate, the upper deltoid, about 3-5 mm. long. Stems very many 
and woody below, prostrate and cz#spitose, branched, flexuous, 
rather stout for the plant, hardly a foot long. Plants with the 
habit of A. tegetarioides, and montanus. Sierra de Parras, Coahuila, 
ere at 9,000 ft. alt. Middle Temperate life zone. No. 4582 
rpus. 
