. 
rounded and narrow at 
- 257 Hamosi. 
than the triangular bracts. Peduncles 5-7 em. long, slender, rather: 
shorter than the leaves and rather longer than the rachis. Leaves ` 
6-8 cm. long, narrow, somewhat tapering, longer than the internodes, 
nearly sessile. Leaflets about 10 pairs, elliptical, obtuse, about 1 
cm. long, rather ashy with wavy and rather loose short and fine hairs, 
young parts hoary. Stipules green, triangular, reflexed, hardly 5 
mm. long. Stems about 2 ft. high, much branched, apparently from 
a woody root, a little flexuous. Parras Coahuila, Nos. 1078 and 4672 
Purpus. Tropical, blooming in spring and fall. Dr. Matthews’s 
specimens from Fort Wingate, New Mexico, in the Gray herbarium 
in flower only are much the same but with linear leaflets and longer 
calyx tube and very long lanceolate bracts. Probably another species. 
218. Astragalus Arizonicus Gray Proc. Am. Acad. 7 398 
(1868). Pods 2-4 em. long, linear, a little arcuate, rather closely 
appressed-erect, with spreading tips, occasionally slightly sulcate 
dorsally but very narrowly so, both sutures rather prominent, much 
laterally flattened, not densely pubescent, occasionally rather toru- 
lose, with ventral suture forming a strong rib, raised, concave along 
the middle, convex at both ends, and beak straight and arising from 
a little above the middle of the end, and about 4 mm. long, the 
pod abruptly contracted into it, cross-section narrowly triangular- 
cordate. Flowers about 1 cm. long, many, in short racemes, dirty- 
white and with purplish edges. Banner oval, arched to erect either 
remotely from or at calyx tips, about 7 mm. long, with sides re- 
flexed 2 mm. wide below, barely longer than keel. Wings not longer 
than keel, narrowly oblong, 2 mm. wide, entire, rounded and very 
oblique, purple below, whitish above, the tips incurved and hori- 
zontal, eel arched a little below, then abruptly erect and pro- 
duced into a sharp tip 3-4 mm. high, large, dark-tipped, 5 mm. long. 
Calyx tube campanulate, about 3 mm. long, acutish at base and 
equally inserted, a little oblique at tip, cleft deeper above, with 
rounded sinuses, closely appressed-nigrescent, a little obcompressed 
above with fleshy base, on a short and stout pedicel about as long 
as the ovate bract, teeth flaring, triangular, pa unequal, shorter 
than the tube, or nearly as long. Peduncles stout, spreading, 1-2 
dm. long. Leaves 7-10 em. long, the upper nearly sessile, wide. 
Leaflets 4-7 pairs, linear and acute to elliptical and rounded, the 
narrower ones 2-3.cm. long, the wider ones about 7 mm. long, dis- 
tant, rather long-petiolulate. Stipules small, triangular, brown, 
about 3 mm. long. Stems more pubescent than the leaves, woody 
at base, procumbent to prostrate, flexuous and often much so. 
Pubescence hoary and a little loose. On the western and southern 
flanks of the Mogollon plateau from the Chimihuevis Mts. to cen- 
tral Mexico, Lower Temperate and upper part of the Tropical life 
zones. Blooming in April and May. 
219. Astragalus calycosus Torrey Bot. King 66 t. 10 (1871). 
A. brevicaulis Nelson. A. cyanoseminus Greene. Hamosa Rydberg. 
Pods 7-25 mm. long, oblong to linear, abruptly acute and with a 
short apiculation to tapering and the beak 3 mm. long with beak in 
line with the ventral suture, rather deeply and narrowly sulcate 
dorsally, with cross section oblong-obovate-cordate, nearly straight 
to decıdediy arched, the ventral suture concave throughout, but 
little raised and narrow. Flowers few, capitate, mostly 1 cm. long. 
Banner abruptly arched at calyx tips to erect, white or purple, oval, | 
about 5 mm. long or less, deeply notched, with sides reflexed about 
1 mm. wide, much longer than the keel and a little longer than 
wings. White spot broad, cuneate, broadly notched, groove rectan-  - 
gular and wider than high. Wings very closely appressed to keel | 
throughout, red-purple to keel tip and white beyond, deeply cleft 
into 2 lobes, the lower ones oblong, 2-4 mm. long, straight and like 
normal wings, the upper | ne-third wider and erect, both lobes 
unded and narrow at tip (usually there is a fine thread almost as ~ 
ing out at their junction), 2-3 
