234 
of calyx tube and abruptly so. straight beyond, hardly 1 cm. long. 
Wings linear, about straight, about 2-3 mm. longer than keel and near- 
"ly as much shorter than banner. The keel straight to near the tip and 
then abruptly erect, about 3 mm. high, rounded. Calyx tube 7-8 mm. 
long and 3 mm. high, truncate below, inserted on the lower and fleshy 
corner, yellowish with loosely appre-sed but rather long hairs with 
shorter ones felted below. Pedicels rather slender, about 4 mm. long 
in fruit and as long as the triangular-subulate bracts. Peduncles 2 3 
dm. long, shorter than the leaves. Leaves short-petioled. Leaflets 
rather conspicuously smaller above, of many pairs, elliptical, inclined 
to be diamond-shaped and acute, 2-4 cm. long, finely and rather 
sparsely silky-felted with appressed and tangled hairs and with some 
longer ones intermixed and mostly yellowish. Stems 1-3 ft. high, f'ex- 
uous, rarely erect, stout, with rather few internodes much shorter 
.than the leaves. Blooming in summer and fall, growing on moist 
banks and gravelly bars along streams from Fort Davis in western 
Texas to the White Mts. New Mexico and souttward to Guerrerro 
Mex. Pringle’s No, 1218 distributed as part of the type of A. Yapuianus 
is this species. 
Astragalus giganteus var. Yaquianus (Watson Proc. Am. 
Acad. 23 270 1888 as species). This differs from the species oniy 
in the calyx tube being 1.5 cm. long, the petals with exserted claws, 
the lanceolate and little arcuate banner about 1.5 cm. long, the na - 
rowly-oblong wings a little longer than the keel, and keel hardly at ail 
arcuate, obliquely oblanceolate, half cuneate, and acutish. Stems are 
much shorter and straggling upward, the leaves longer and less pubes 
cent and with larger leaflets. Sierra Madre Mts. Mexico from Colo- 
nia Juarez to the Yaqui river along stream beds just on the edge ofthe 
Tropical life zone. : : 
193 Astragalus Orizabae Seaton Proc. Am. "Acad. 28 117 (1893): 
Pod rugose, about 1.5 cm. long, when nearly globose 1 cm. wide and 
high, when ovate (as in the variety) it is 2 cm. long and a little arched 
the ventral suture is straight and deeply sulcate but not so dorsally, 
beak conical and declined and 1-2 mm. long, base cordate, surface 
somewhat short-hairy and sparsely felted, pods distinctly inflated, in 
dense and sohrt spikes, on peduncles shorter than the leaves. Flowers 
2 cm. long, narrow, ochroleucous or purple-tinged, in short and dense 
spikes, spreading. Banner linear-oblanceolate, 1.5 cm. long, slightly 
ascending, with sides reflexed in the middle 2 mm. wide, narrowed at 
tip, fully 1 cm. longer than keel and 5 mm. longer than wings. Wings 
o> linear, straight, about 2 mm. wide, rounded. Keel with exserted claw, 
5 mm. long, 2-3 mm. high, half-rhomboidal, with the rounded, purple 
_ tip nearly erect, with base straight to the middle and then sharply ar- 
cuate to nearly 90 degrees. Calyx broadly cylindrical, a little narrow- 
er at tip and cleft deeper above and a little oblique at tip, inclined to 
be trnncate and nearly equally inserted at base, with teeth subulate 
and rather lax and about two thirds as long as tube. Bracts triangular 
and about 3 mm. long. Leaves linear, 2-3 dm. long in the type, with 
15-18 pairs of leaflets which are elliptical, rounded, closely felted, in- 
clined to be a little narrower below, 1-15 cm long in the type. Stems 
tufted, zigzag, 1-2 dm. long, rather thick and woody at base, in rocky 
places. Mt. Orizaba below Nexico City, Seaton. Hacienda Palmar 
near Pachuca, July 21 1905, Rose. Nat. Herb No. 452293. Near Irola 
une 14 1899, Rose. Nat. Herb. No. 346530, the lower plant on the sheet. 
arren hills near Esperanza, Puebla Aug. 17 1903, Rose, Nat. Herb. 
No. 450191. Near Calchicomula, Puebla, Rose, July 24 1901, Nat. 
Herb. No. 395437.. ; ' Pw 
