Micranthi. 276 



internodes nearly as long as the leaves, flexuous, prostrate or widely 

 spreading:. Stipules not connate, triangular, 2-3 mm. long. Root 

 apparently perennial. Plants with the habit of A. Nuttallianus. 

 Esperanza Puebla Mexico, Purpus, No. 5645. Probably Tropical. 



249. Astragalus Pringlei Watson Proc. Am. Acad. 21 449 

 (1886). Pods oblong, 7-10 mm. long, about 3 mm. wide and 2 

 mm. high, abruptly and strongly apiculate, with ventral suture 

 straight and in line with it, broadly sulcate dorsally, with cross 

 section broadly and narrowly (vertically) reniform. FloAvers white 

 or purple-tipped, 8-12 mm. long, loose. Banner arched a little 

 beyond the calyx tips, 2-3 mm. longer than wings, with sides re- 

 flexed below. Wings broadly linear, a little arched, 2 mm. longer 

 than keel. Keel narrow, about 3 mm. long, gently arched from base 

 to 45-90°, and with rounded and dark tip about 2 mm. high. 

 Calyx tube 3-4 mm. long, about 2 mm. high, v.'ith straight base 

 and convex upper side, oblique at base and acute and attached by 

 the lower corner, not oblique at tip nor deeper cleft, teeth trian- 

 gular and nearly half as long as tube. Pedicels slender, about 1 

 mm. long and about as long as the ovate bracts. Peduncles 2-3 

 cm. long, filiform, axillary. Leaves about 2 cm. long, nearly half 

 is petiole. Leaflets 5-7 pairs, linear to obovate, obtuse, 2-3 mm. 

 long, not contiguous, thick, ashy with minute and fine short hairs 

 or greener above. Stems prostrate, only a few inches long, with 

 short internodes. Stipules small, not connate. The flowers and pods 

 are quite variable in size. Tropical, blooming in April. On the 

 plains near Chihuahua City, Zvlexico. 



250. Astragalus parvus Hemslay Bot. Cent. Am. 1 266 (1880). 

 Pods linear, about 1 cin. long and hardly 2 mm. high, apiculate, 

 spreading, sulcate narrowly along the dorsal suture which is straight, 

 and the tip in line with it, the ventral suture convex. Flowers 

 purple, about 7 mm. long. Banner about 5 mm. long, arched abruptly 

 at calyx tips to 45-90°, with sides reflexed below, about 3 mm. 

 longer than wings. Wrings oblong, arched, about 1 mm. longer 

 than keel. Keel with entire blade erect, 2 mm. long and high, the 

 front rounded to over a half circle, very obtuse. Calyx tube about 

 2 mm. long, narrowed below, little oblique attached below the mid- 

 dle to a slender but minute pedicel, the triangular teeth about half 

 as long as tube. Bracts minute. Peduncles 2-3 cm. long, . longer 

 than the leaves, subterminal. Leaves 3-5 cm. long, spreading, only 

 the uppermost sessile. Leaflets 6-9 pairs, oblong, distant, obtuse, 

 2-4 mm. long, short-petiolulate. Stipules very small, broad, green, 

 not connate. Stems rather many from a thick root, decumbent, a 

 few inches long, with short internodes. San Luis Potosi Mexico, 

 Lower Temperate life zone, in open places. 



251. Astragalus Schaffneri n. sp. Pods about 1 cm. long, 3 

 mm. high and 4 mm. wide, linear-oblong, a little arcuate, with the 

 ventral suture concave and the somewhat declined tip in line with 

 it, triangular-acute, broadly sulcate dorsally, with reniform cross 

 section, indifferently spreading or reflexed. Flowers, pedicels and 

 bracts as in A. parvus. Peduncles filiform, 3-6 cm. long. Stems 

 nearly filiform, flexuous, widely spreading, freely branched below 

 and open, from slender woody rootstocks, about a foot high, with 

 internodes 2-3 cm. long, floriferous nearly throughout. Stipules sub- 

 ulate, conspicuous, spreading 3-4 mm. long. Leaves 3-4 cm. long, 

 ascending, all but the lowest sessile. Leaflets 5-8 pairs, nearly 1 cm. 

 long, distant, folded and seemingly linear but narrowly elliptical, 

 long-petiolulate, obtuse. No. 815 Schaffner from San Luis Potosi 

 Mexico. This has been referred to A. parvus by Watson, but it 

 appears to be quite a different plant. Lower Temperate life zone. 



252. Astragalus Lemmoni Gray Proc. Am. Acad. 8 626 

 (1873). Pods half-oblong-ovate, about 7 mm. long, 2 mm. wide and 

 1.5 mm. high, with cordate cross section, almost straight (rarely 

 a little arcuate) along the ventral suture and ending in a sharp 

 mucro and triquetrous, shallow-sulcate dorsally, green or reddish, 



