78 
above, purple-striped by a single line a little above the midrib. Keel 
half-cuncate, about 6-8 mm. long and half as wide, purple, rounded 
at tip, and base straight. Calyx tube campanulate, about 3 mm. lonz, 
rounded at base and attached in the middle of the end, fleshy-thickened 
below, slightly flattened laterally, with lax and subulate téeth as 
long as tube. Whole plant finely ashy-silky with loose pubescence 
except the closely appressed-pubescent pods. Pedicels 2-4 mm. long 
and except in fruit shorter than the bracts which are rigid, green, 
and 3-5 mm. long. Peduncles stout, very sulcate, 1-2 dm. long, strict, 
longer than the floral rachis and shorter than the fruiting one, and 
with loosely racemose pods. Stems coarse and deeply sulcate, often 
l em. thick, erect, 1-2 feet high, branched below, in very dense tufts 
2-5 feet wide and 2-3 feet high, from a thick, fleshy and erect root. 
Leaves rarely 7 cm. long, small and inconspicuous, with 1-3 pairs of 
filiform, channeled, leathery leaflets, 1-2 cm. long, not jointed to rachis, 
distant, like the rachis. Stipules large, leathery, rigid, acute, green 
"^ coarse, twice as wide and often twice as long as the adjacent leaflets 
`- the upper linear and erect, the lower triangular and often 1 cm. wide 
and as long as the included leaf or nearly. Lower leaves very small. 
This grows in drifting sand dunes and the like, in the Lower Tem- 
'* perate life zone, It has a strong snake-like odor and dries very slowly 
^. the whole plant being leathery. This is the most beautiful species of 
the genus when the whole mass is ablaze with the pink-purple bloom. 
On the sandy foot of the San Rafael Swell. Named for the late Rob- 
ert Woodruff C. E., my companion in trips on the deserts of the 
Navajo Basin. 
13A. Astragalus Pasqualensis Jones Cont. 10 87 (1902). Pods about 
2 em. long 2 mm. high and 1 mm. wide, with beak in the middle of 
the end, sessile, ashy. Flowers purple, rather coriaceous, inclined to 
be sulcate at both sutures. 7-8 mm. long, wide, ascending, several in a 
close raceme. Banner round, abruptly reflexed to the calyx at its 
tip, about 5 mm, long, as long as wings and keel. Wings oblanceo- 
late, about 1 mm. wide, much narrower than keel. Keel about 5 mm. 
long, 2 mm. high about the middle. half-rhomboidal-obovate, acute, 
conspicuous. Calyx tube about 1 mm. long, hemispherical, with the 
subulate teeth twice to three times as long and spreading. Bracts 
subulate, about 1 mm. long. Pedicels stout, hardly 1 mm. long. re- 
flexed. Peduncles 2-3 cm. long, about half as long as rachis Leaves 
3-4 cm. long, very broad almost sessile. Leaflets apiculate, distant »nd 
obtuse, about 2 cm. long, rigid, hoary with very minute and fine 
hairs fixed by the middle. Stems a foot or two high, decumbent, 
leafy, with the internodes about half as long as leaves, from a woody 
bose. Santiago de Pasqualo, Durango Mexico, Palmer No. 398, Anril 
to May 1896. This is probably not an Astragalus. The vrey rigid 
and immature p^ds seem to have an inner lining and are wholly 
1-celled (described as 2-celled), they seem to be sulcate or inclined to 
be sulcate at both sutvres, and probably are contracted between tho 
seeds and partly separate when mature. Bnt so far as the material 
goes cannot be referred to any other genus, What-is evidently the 
same species is No. 5831 Purpus from Puebla Mexico, May 1912. : 
14. Astragalus simplicifolius (Nutt.) Grey Proc. Am. Acad. 6 231 
(1864) Phaca simplicifolia Nutt. in T. & G. Fl. 1 350 (1838). Homalo- 
bus uniflorus Rydberg, Pods linear and short-acuminate to triangıı- 
lar-ovate, straight or with ventral suture concave, not over 1 em. long, 
. about 2 mm. high, completely flat when young, elliptical in cross 
. section when ripe, with acerose tip, sometimes barely exceeding the 
. calyx, mostly 1-seeded. Flowers 6-8 mm. lone, with light claws, solitary 
_ in the type, on peduncles not longer than the very short leaves. Ban- _ 
_ mer about 5 mm. long, oval, arched abruptly at calyx tips to about 60 
