Didymocarpi. 286 
ends, about 2 mm. high, obcompressed somewhat or not at all, 
didymous, sessile, few in loose and oblong heads, not reflexed,: ap- 
parently smooth, about 6 mm. wide, apiculate with a declined tip, 
finely and closely cross-ribbed, sulcate ventrally, both sutures raised 
as narrow ribs, the dorsal convex and little if at all sulcate. Flow- 
ers about 8 mm. long, purple, few in loose heads, narrow. Ban- 
ner ovate, arched a little at calyx tips, with sides reflexed Y mm. 
wide, about 5 mm. long, 1 mm. longer than wings. Wings obliquely 
oblong-lanceolate, 2 mm. longer than keel, arched a little, purple- 
tipped. Keel about 3 mm. long and high, arched from base to a 
half circle, very obtuse, about 2 mm. wide in the middle. Calyx 
narrowly campanulate, 3 mm. long, acute at base, nigrescent, with 
straight lower side and arched upper side, with subulate teeth lax 
and nearly as long as tube.. Bracts subulate, 2-3 mm. long, pedicels 
1-2 mm. long. Peduncles 5-15 cm. long, longer than the leaves. 
Leaves 5-10 cm. long, short-petioled. Leaflets nearly linear, rather 
obtuse, apiculate, 7-15 mm. long, 6-12 pairs, rather long-petiolulate, 
minutely pubescent with short and appressed white hairs, smooth 
above, distant. Stipules lanceolate. Stems from perennial roots 
and in the type erect, about a foot high and freely branched 
with short internodes and many leaves. On hillsides at Zacatecas 
Mexico. Tropical. 
Astragalus diphacus var. peonis Jones Cont. 10 65 (1902). 
Stems prostrate with ascending tips, silvery hoary throughout. 
Flowers white, sides of banner folded back to the midrib nearly all 
the length except at the very apex where with the notch is formed 
a heart-shaped enlargement, tip of banner is at nearly 30° to the 
claw, it begins to curve at a point about 2 mm. beyond the calyx 
teeth, the outline of the banner as folded is oblong with a triangular 
base, no white spot but banner waterlined. Wings ascending 30°, 
obliquely-oblong-oblanceolate, rounded, 1 mm. wide, 1 mm. longer 
than keel and exposing the base of keel. Tip of keel blunt and 
incurved 90°, rounded at apex. The wings are incurved at tip and 
fiat. Flowers declined generally. Pod didymous, chartaceous, cross 
section is that of the figure 8 laid on its side. Leaflets about 8 
pairs, folded, 5-10 mm. long, elliptical. Calyx teeth triangular and 
about half the tube which is rather hoary with white and black hairs > 
intermixed. Stipules deltoid, erect, green, 3 mm. long. Leaves 2-3 
cm. long. Zacatecas Mexico, Jones. May 16, 1892. 
272. Astragalus Angelinus n. sp. Pods very obliquely oval- 
ovate, 5-7 mm. long, 3-4 mm. wide, 3 mm. high, truncate to slightly 
cordate at the sessile base, reflexed in dense and short spikes, open- ` 
ing first at base, faintly cross-ribbed, inclined to be flattened along 
both sutures or very slightly shallow-sulcate, the ventral suture 
straight above and ending in a minute mucro which is a little de- 
clined, below it is much arched, the suture is very thick but little 
raised, dorsal suture scarcely evident, very convex throughout, tip 
of pod obtuse to a little retuse, but pod never didymous, cross 
section oblately oval and with the ventral side rather flattened, 
completely 2-celled to tip, coriaceous and very rigid, a little inflated, 
minutely pubescent. Flowers gone. Calyx campanulate to subglo- 
bose, about 2 mm. long, with subulate teeth abcut as long. Pedicels 
stout, reflexed, about 2 mm. long, nearly equaled by the triangular 
' bracts. Peduncles rather slender, about 1 dm. long, axillary 
throughout, arched, fruiting spikes 3-5 cm. long, oblong. Leaves 
nearly 1 dm. long, about sessile, of 10-12 linear and retuse leaflets 
narrowed and long-petiolulate below, distant, 1-1.5 cm. long, many, 
with short internodes, spreading. Stipules triangular-subulate, 3- 
mm. long, not connate. Stems iode a weak, and depressed or 
decumbent from a rather woody but slender base, tufted and 
branching at base, rarely a foot long. From near San Angel valley 
Probably Lower Temperate life zone. Also near El Salto Hidalgo, 
$ 
