Leptocarpi 270 
low, triangular-apiculate. Flcwers pale or purple-tipped, arched. 
Banner rather obcordate, a little longer than keel and equaled by the 
wings or oval and 2 mm. longer than wings. Wings obovate, about 
as long as keel or a litile more, entire. Keel with straight base, 
then rounded to erect or a little more, the tip either triangular- 
acuminate or deltoid or rarely obtuse, erect, 2-4 mm. high. Calyx 
tube acute at base, not gibbous, 1-2 mm. long, the teeth subulate 
unequal, and as long. Bracis ovate, minute; pedicels -very short. 
Peduncles very short to 3 times as long as leaves, filiform. Leaves 
sparse, all petioled, 2-5 cm. long. Leaflets in the type about 5 pairs 
and oval to elliptical, rounded, rarely acutish, mostly notched, con- 
tiguous, rather smooth above, usually about 7 mm. long, rarely 1 
..em. or 2 mm. long. Stipules lanceolate. „Delicate and filiform 
stemmed plants from a few inches to 2 ft. long, freely branched 
below, prostrate. Common from the Pacific coast to the Plains 
of Colorado throughout the Great Basin and southward to central 
Mexico, on sandy plains. Lower Temperate and Tropical life zone. 
Blooming. throughout the season, sometimes a winter annual. A. 
subuniflorus, Greene, is probably the same. 
Astragalus Nuttallianus var. trichocarpus T. & G. Fl. 1 334 
(1838). A. trichocarpus (T. & G.) Young. This differs from the 
type in having the whole plant even to the pods villous with spread- 
ing hairs. Low annual mostly. Peduncles short. Leaflets 5-7 pairs, 
at least obtuse. Flowers about 4 mm. long. Keel much shorter 
than the banner, tip incurved and acute to obtuse, the annual forms 
- have decidedly pointed keel. This is more common in Texas and 
New Mexico. ; i 
. Astragalus Nuttallianus var. enneajugus Jones Cont. 8 22 
(1898). Pods arched most below, 2: em. long, 2.5 mm. high, much 
flattened laterally, smooth, ascending. Flowers several, about 7 mm. 
long, in a head in both flower and fruit. Calyx tube 1.5 mm. long, 
teeth filiform-subulate, nearly double the tube. Peduncles shorter 
than the leaves in fruit or longer in flower. Leaflets at least on the 
upper leaves 9-10 pairs, oblong, emarginate, not over 1.5 cm. long. 
Roousi plants, leafy, 1-1% ft. high. Stipules conspicuous, 4 mm. 
long, adnate. Texan prairies. I x 
F Astragalus Nuttallianus var. quadrilateralis Jones Cont. 8 22 
. (1898). Pods congested at tips of peduncles, smooth, gently arcu- 
ate, 2 mm. high, 2.5 cm. long, quadrilateral, shallow-sulcate at both 
sutures, sides rather concave, tip ascending and sharply acute. Flow- 
"A starved form 
2-4 mm. long an 
