159 
trifle arched, about 1 mm. wide and 1 mm. longer than keel. The keel 
straight, about 4 mm. long, then abruptly erect, triangular and acutish 
and about 3mm. high. Calyx tube about hemispherical, 3 mm. long 
and wide, appearing inflated, rounded at the fleshy base and about e- 
qually inserted, cleft deeper above but barely oblique above, the sinus- 
es very broad, and the subulate teeth about 2-3 mm, long and very 
slender. nigrescent. Pedicels in flower stout and very short, longer 
than ihe very papery, white and subulate bracts, but becoming 2-3 
am. long and even slender in fruit. Peduncles nearly filiform, spread- 
ing, often a foot long. Leaves about 1 dm. long, weak, with lax and ta- 
p-ring petioles and rachis, widely spreading. - Leaflets 12-15 pairs, el- 
iptical, truncate to notched at tip and apiculate, 7-10 mm. long and 
about half as wide, minutely pubescent along the margins and midrib. 
Stipules very thin and papery, subulate, about 1 cm. long or less, uni- 
ted below. Stems 2-3 ft. long, straggling upward and rather freely 
branched. This grows in barrancas (canons) in the mountains in ra- 
ther moist places from Oaxaca and Hidalgo Mexico to Guatamala in 
the Middie Temperate life zone. It is probably A. bidentatus H.B.K. 
a very uncertain species because only the figure remains to represent 
the species, and we know that these were not always accurate in some 
cases of well known species. : i 
Astragalus Guatamalensis var. Oaxacanus (Rose) Jones. A. Oaxa- 
canus Rose in herb. This is a form with smooth, oblong-oval pods on 
astipe longer than the calyx. Bracts triangular, 5-8 mm. long. Leaf- 
lets elliptical to narrowly oblong-ovate, often ashy. This is Pringle's 
No. 6264 from Oaxaca. It has the same elongated and slender stems 
which are decumbent, broad leaflets, and blunt pods of thetype. It is 
the common form in Mexico from the states of Hidalgo, Mexico, and 
Oaxaca. 
Astragalus Guatamalensis var. Lozani (Rose) Jones. A. Lozani 
Rose in herb. Stems a foot high, ascending, slender, freely branched, 
from underground branches of the root. Leaves 5-7 cm. long, with 
about 10 pairs of small leaflets which are oval to elliptical and rarely 
2cm. long. Internodes 2-5cm. long. Pods the same as in the other 
variety but ashy as well as the whole plant. Bracts hardly as long as 
the calyx tube. Sierra de Pachuca Hidalgo Mexico, Pringle’s No. 6935 
tu 28 1898, 9000 ft. alt. Middle Temperate life zone. The type is the 
National Herb. No. 462652. Also collected by Nelson in Oaxaca, No. 
1940, Nov. 12 1894. Zacatecas México, Rose, Aug. 26 1897, Nat. Herb. 
No. 301562. ; 
Astragalus Guatamalensis can be separated from extreme forms 
of A. strigulosus only by the flowers being in heads, and by the broad- 
er and blunt pods. It is described as having sessile pods without par- 
tition and with creeping stems, but this not true of the specimens cited 
. by the author in his description. Both species have the narrow sep- 
tum going part way across from the dorsal suture. 
148 Astragalus Painteri Rose in herb. This is like the preceding 
species but the calyx teeth are minute and de'toid and about a quarter 
as long as tube, stipules subulate and not at all connate. Pods open- 
ing only along the dorsal suture, about 1.5 cm.long, oblong-oval, trun- 
cate at base, abruptly apiculate-acuteat tip, much obcompressed and 
broadly sulcate dorsally but not at all ventral'y, smooth, strongly 
cross-nerved, inflated, chartaceous, with septum intruded about a half 
mm. high. © Ventral suture much thickened, raised and white. Stipe a 
little, shorter than calyx. Flowers white but purple-tinged, about 1 _ 
cm. long, in heads and soon reflexed. Banner oval, about 5 mm. long, 
arched to 45 degrees beyond calyx tips, with sides reflexed 1 mm. | 
wide in the middle, about 1 mm. longer than wings. Wings arched a 
little, lanceolate, about 2 mm. wide in ths middle. 2 mm. longer than | 
keel. Keel half-rhomboidal, very obtuse, about 3 mm. high, purple- 
tipped. Calyx about hemispherical, 3 mm. long, rounded at base and — — 
.— inserted near the corner, minutely nigrescent, about twice as long as —— — 
_ the triangular and white bracts. Teeth variable but mostly very short. — — 
