285 Didymocarpi. 
keel, white. Keel about 3 mm. long, 2 mm. high, the very broadly 
deltoid and obtuse tip only a little higher than the rest, very dark- 
purple, shining through the banner and wings, abruptly rounded. 
Calyx tube black-hairy, about 2 mm. long, narrowly campanulate, 
acute at base, with teeth from half to as long as tube. Pedicels 
and bracts minute. Peduncles rather stout for the plant, 3-5 em. 
long. Leaves 3-5 cm. long, rather few, with short but evident - 
petiole, delicate, spreading. Leaflets 4-5 pairs, cuneate-oblong-obo- 
vate, not contiguous, sparsely pubescent below, 5-7 mm. long. 
Stipules deltoid, green, about 2-3 mm. long. Stems short, flexuous, 
much branched. Pubescence sparse, short, the upper sides of leaflets 
smooth. In fields from Mendocino Co. to San Francisco. 
269. Astragalus didymocarpus H. & A. Bot. Beech. 334 t 81 
(1841). A. Catalinensis Nutt., Hesperastragalus Heller. Pods 
about 3 mm. long and 2 mm. high and wide, half-oblate-oval, or 
obliquely ovate, deeply sulcate dorsally to beyond the middle and 
with eross section a crescent with rounded ends, smooth, ventral 
suture raised and very thick and with strong ribs running out from 
it and meshing on the angles much as in Euphorbia seeds. Flowers 
purple or white, 4-8 mm. long in ovate to oblong heads. Banner 
.oval-ovate to oblong, 3-7 mm. long, arched at calyx tips to 45°, 
when colored with large, veined white spot low down, 1-2 mm. 
longer than wings. Wings oblanceolate to obovate, 1 mm. wide, 
white at tip and purple below, about 1 mm. longer than keel. Keel 
straight, 3-4 mm. long, 2 mm. high, with triangular ascending tip 
rounded and about 2.5 mm. high. Calyx tube campanulate, acute 
at base, about 2 mm. long, with sharp sinuses. Bracts ovate, hya- 
line, about 1 mm. long. Pedicels none. Peduncles 3-5 cm. long, 
longer than leaves. Leaves 3-4 em. long, lax. Leaflets 3-5 pairs, 
narrowly cuneate-oblong and with contracted tip deeply notched, 
about 1 cm. long, distant. Stipules triangular, reflexed, 2-3 mm. 
long. Stems flexuous, erect or spreading, branched below, very 
slender, with internodes few and 1-7 cm. long. Common in all 
the valleys from central California to San Quentin Lower California, 
running a little over into the Great Basin at Mojave. 
270. Astragalus dispermus Gray Proc. Am. Acad. 13 365 
(1878). Pods oblately oval to deltoid-ovate, 3-4 mm. long, 2-2.5 
mm. wide and 1.5-2 mm. high, with cross section flatly triquetrous- 
cordate with sharp angles (or rounded), pubescent, slightly to 
deeply corrugated, sulcate as in didymocarpus and with ventral 
suture convex as in that species but a mere line. Flowers in a 
dense ovate head, purple, 3-5 mm. long. Banner oval, 2-3 mm. long, 
arched to 45°, often not exceeding the calyx tips, rarely 1 mm. 
longer than wings. Wings white, obliquely oblong-lanceolate, %-1 
mm. longer than keel. Keel straight, about 3 mm. long, abruptly 
erect at tip and 2 mm. high, base 1.5 mm. high. Bracts green, 
subulate, about 1 mm. long, scarcely visible. Calyx conspicuously 
white-shaggy, the hairs concealing the shape, the teeth setaceously 
subulate, green, longer than the tube. Peduncles 1-5 cm. long, axil- 
spreading hairs. Stems prostrat 
ft. long, with lon 
Nevada, to Wicken erg 
Mts. and throughout the 
ts. and southward into 
carp Peg te aod ds of 
