223 
186 Astragalus Layneae Greene Bull. Cal. Acad. 3 156 (1885). 
Pods 3-3 cm. long, arched even to a circle at times, long-acuminate,. 
narrowed below and short-stipitate, when fresh, somewhat fleshy, with 
walls 1 mm. thick and with cross-section about reniform, when dry the 
pods are triquetrous and very broadly sulcate dorsally from the base 
toward the tip but conspicuously flattened laterally above, the dorsal 
suture intruded about half way but not asa thin partition, being simply 
unchanged sides of the sulcus united for a space 1-2 mm. wide, to the 
¿middle at least, where the pods are 1-celled to the tip, pods mottled, 
shortly and thinly appressed-hairy, to almost smooth, with ventral 
suture raised and thin externally, sometimes the pods are completely 
compressed and with linear cross-section, they are then very falcate, 
they are reflexed or ascending. Flowers conspicuously white and with 
oniy the tips purple, 1.5 cm. long, racemose, many, rather stubby 
Banner mostly white, about 7 mm. long, oval-ovate, with sides reflexed 
3 min. wide below, abruptly arcuate to 45 degrees just beyond calyx, 
with sides reflexed to the tip making the blade appear triangular, the 
very tip purple or purple-veined, white spot obcordate and striate, the 
groove V-shaped and 2 mm. deep and reaching the tip. Wings linear- 
cuneate, a little over 2 mm. wide, at tip, rounded, straight or a little 
arcuate, concave to keel, with tips meeting, about half as wide as keel, 
purple 3 mm. back from tip. Keel straight, about 5 mm. long, abrupt- 
ly erect and 3 mm. high, the tip dark and deltoid. Calyx almost cam- 
panulate, hardly 5 mm long and 4 mm. wide, the upper side arched and 
the lower straight, truncate below and inserted near the corner ona 
very short and stout pedicel, dark with short and appressed hairs, thin, 
with teeth black, triangular and about 1 mm. long. Bracts ovate to 
ovate-lanceolate, barely 4 mm. long, sparsely hairy above. Peduncles 
stout and strict, from shorter than the leaves to much longer, 1-3 dm. 
long and with the floral rachis nearly as much more. Leaves with 
short petioles which are about a third the whole and stout but taper- 
ing but little. Leaflets about 6-8 pairs, hardly contiguous, oval, about 
l cm. long, long-petiolulate, sometimes notched, rather closely ap- 
pressed-puberulent with tangled and long hairs and inclined to be sil- 
very. Stipules deltoid or very broad, rarely 1 cm. long. Proper stems 
from almost none to a foot long, very zigzag (that is bent abruptly at 
each node, in distinction from flexuous which can mean bent: between 
the nodes), with internodes rarely 2 cm. long, several from slender 
root-branches. Leaves mostly flat on the ground. This growsonthe 
gravelly desert benches in the lower part of the Lower Temperate life 
zone, blooming in April, and seeming to thrive best in rather sandy 
places. From Chloride Arizona to Amargosa desert and westward to 
the Sierras. 
; Astragalus amphioxys x Layneae This is a hybrid occurring on 
. the eastern border where it has the pods of A. amhioxys but either 
. wholly 1-celled or partly so and more fleshy than Layneae, and with 
the leaves and flowers of that species, 
Astragalus malacus x Layneae. Thisisarare hybrid on the wes- 
tern border with the flowers and pubescence of A. Layneae, and pods 
varying toward A. amphioxys. 
. 187 Astragalus succumbens Douglas in Hook. Fl. Bor. Am. 1 151 
(1834). Pods about 4 cm.long, 5 mm. high, and 2 mm. wide, with the 
cross-section linear-triquetrous, ascending (but the calyx nearly hori- 
zontal), arched to about one third circle, splitting. the calyx, many, 
spicate, delicately cross-nerved, with declined and short tip. Flowers 
ascending, nearly white and with pink-purple base. Banner oblong- 
ovate, about 8-10 mm. long and 7 mm. wide, very deeply notched and 
.  water-lined, with sides not reflexed, gently arcuate at calyx tips to 
erect, groove U-shaped below and widening to nothing above and fil- i; 
. ling about one tihrd of the banner. Wings almost straight, as long 
s As ne ner and very conspicuous, ; 
3-4 mm. wide, rounded, lacerate at tip, —— 
