LI 
Micranthi. 280 
Pringle's No. 6445, distributed as A. Seatoni. Lower Temperate life 
zone. This is hardly more than a good variety of A. Hartwegi. 
260. Astragalus hypoleucus Schauer Linnza 20 747 (1847). 
Pods linear-oblong, 1-1.6 cm. long, 2-3 mm. wide, 1.5-2 mm. high, 
obcompressed, closely reflexed, a little arcuate, sulcate dorsally 
with V-shaped sulcus, apiculate, with cross section obcordate, with 
ventral suture a little raised externally, arranged in dense spikes. 
Flowers spicate to racemose-spicate,. white, spreading, or slightly 
reflexed, 4-5 mm. long. Banner arched to 90° at tip of calyx 
tube; sides reflexed at base to-90^; tip notched 1.5 mm. deep; groove 
barely evident; blade 4 mm. long, 2 mm. wide, oblong. Wings 
oblong-ovate, hooded, distant from keel and.arched over it so that 
the keel and wings form the figure 3 laid on its side, about 1 mm. 
wide, 1 mm. high, ascending 10°. Keel very short and blunt, tip 
incurved at least 100^. Calyx tube villous-woolly, 2 mm. long, cam- 
panulate, not oblique at base; teeth triangular, the lower much the 
longer but not longer than tube. Bracts white-pubescent, 2 mm. 
long in fruit and closely recurved. Flowering pedicels barely evi- 
dent. Peduncles persistent, with rachis 1-1.5 dm. long, floriferous 
on the upper one-half to one-third, shallow-sulcate. Leaves all but 
the lowest sessile, about 5-7 cm. long, often fascicled when they 
arise from the woody tips of the stems. Leaflets about 10 pairs, 
broadly to narrowly elliptical, not over 1.2 cm. long, thickish, 
rounded above, abruptly narrowed at base, rather long-petiolulate, 
not contiguous, rarely truncate, rather less pubescent above than 
below. Stipules connate almost to tip, scarious, barely adnate. 
Stems simple, floriferous above, lower parts often woody, decum- 
bent, flexuous, 1-3 ft. long, internodes 3-7 cm. long, shallow-sulcate, 
Root woody; pubescence of whole plant silvery-white. Zacatecas, 
Puebla, Nuovo Leon, Hidalgo, and central Mexico. Lower Temper- 
ate life zone. This has the habit of A. humistratus. 
261. Astragalus oxyrhynchus Hemsley Bot. Cent. Am. 1 265 . 
(1880). Pods about 7 mm. long, oblong-ovate, with falcate and 
very acutely triangular tip, smooth, sulcate dorsally, with reniform ' 
cross section, somewhat obcompressed. Flowers 5-7 mm. ‚long, 
broad, nearly sessile, purple. Banner round, purple-striped, abruptly 
arched at calyx tips to erect, about 3 mm. long, a trifle longer than 
wings.- Wings oblong, arched, barely longer than the large keel. 
Keel nearly a half circle, obtuse. Calyx nigrescent, about 2 mm. 
long, teeth subulate and as long as tube. Bracts small, subulate- 
triangular. Peduncles 2-6 em. long. Leaves 3-5 em. long, nearly - 
sessile. Leaflets 6-9 pairs, oblong-linear, 7-10 mm: long, obtuse, 
ashy with minute short and closely appressed hairs. Stems slender, 
flexuous, widely spreading to prostrate, with slender internodes. 
Valley of Mexico, San Luis Potosi, and state of Hidalgo. Tropical. 
262. Astragalus Seatoni Jones Cont. 7 676 (1895). Pods half- 
oblong-oval, apiculate, not acuminate nor long-pointed, about 4 mm. 
long and 2 mm. wide, minutely stipitate, with nearly round cross 
section, a little sulcate dorsally and the suture a trifle intruded but 
not completely 2-celled, nigrescent. Flowers white or whitish, ses- 
sile, 3-4 mm. long, broad. Banner round, abruptly arched to erect 
at end of tube, about 2 mm. long. Wings narrow and about as 
long. Keel very arcuate, oblong and rounded, about as long as 
banner. Calyx almost hemispherical, about 1.5 mm. long, ni- 
grescent, the triangular teeth a little shorter. Bracts and pedicels 
almost none. Peduncles about as long as leaves, 3-4 cm. long, = 
axillary, spreading. Leaves wide, 3-4 cm. long, widely spreading, 
= 
the upper sessile. Leaflets 10-12 pairs, 8-15 mm. long, linear, nearly | er 
smooth. Stipules small. Stems very slender and branched through- — 
out, the branches widely spreading, decumbent from slender 
| ME ELM E ME UE. Internodes about as long as i i 
. . leaves, slender and with sparse leaves. Mt. Orizaba Mexico at 
= ee ft. alt. Middle Temperate life zo gin 
to A. o: 
zone. Seaton. Blooming in 
