196 



June. 



Astragalus gracilentus var. Hallii (Gray) Jones Cont. 8 13 (1898). 

 This differs from the type in having the pods wider above and more 

 inflated, smoother, rather clavatc-oblanceolate, 5-7 nam. wide, about 2 

 cm. long, wiih ventral suture straight or concave near the narrowed 

 base, and variably convex at tip, little laterally flattened or rarely 

 lound in cross-section, distinctly stipitate, coriaceous to chartaceous. 

 Flowers and pods inclined to be short-spicate to almost capitate, the 

 flowers about 1.5 cm. long, stubby, v^'ith caly.x tube about 5 mm. long 

 and 4 mm. high, and witli minute deltoid teeth. l\vin Lakes and the 

 Sangre de Christo mountains Colorado and San Francisco mountains 

 Arizona. .Middle Temperate life zone. 



Astragalus gracilentus var Greenei (Gray) Jones Cont. 8 14 (1898). 

 Pods strictl}' sessile, with minute and spreading hairs, splitting the 

 calyx, 1.5-2 cm. long and nearly 1 cm. wide and high, broadly sulcate 

 A entrally, oval to oblong-ovate, conspicuou^ly inflated, faintly cross- 

 1 ibbed, with a triangular, flat and stout beak. Flowers shortly-race- 

 mose, 1-1.-5 cm. long, as in the type but the calyx teeth subulate and 

 lialf as long as tube. Leaflets broadly oblong, rounded, about 5 mm. 

 long. Peduncles longer than the leaves. Whole plant ashy, and the 

 f lems and i^^eduicles almost white. Mogollons New Mexico, bloom- 

 ing in April. The type of this form is in the Gray Herbarium and 

 ( uplicate material is in my herbarium and a few others but variously 

 jiiixed since Greene did not know one form from the other confusing 

 f.illax forms with it. All of the mature plants and most of the pods 

 lie distributed are fallax. 



ivstragalus gracilentus var. exsertus N. Var, This is a very remark- 

 able form with few flowers about 2 cm. long, brilliant-purple, strongly 

 striped and with exserted claws. The oblong banner is nearly 1.5 cm. 

 long with sides much reflexed below, slightly and abruptly arched be- 

 yond the calyx tips to 30 degrees, about 2 mm. longer than wings. 

 Wings 2 mm. wide, a little arched and obtuse, purple-striped, 3-4 mm. 

 longer than keel. Keel straight, forming nearly a half circle, 4 mm. 

 long, and 3 mm. high, the tip erect and triangular, light-colored. Ca- 

 lyx tube about 5 mm. long and 3 mm. high, about as long as the subu- 

 late teeth. Bracts much longer than the short and stout pedicels, 4 

 mm. long. Pods about 2 cm. long, 1 cm. wide and high, sulcate ven- 

 trally, strongly cross-ribbed and almost cartilaginous, oblong, sessile, 

 splitting the calyx, the stout and flat beak upcurved and about 4 mm. 

 long. Ventral suture straight, dorsal suture much arched, cross-sec- 

 tion rather obcordate. Leaflets 6-12 pairs, cuneate-oblong, notched, 

 fully 1 cm. long. WMiole plant minutely woolly. Stipules green, 

 nearly linear, almost 1 cm. long. Trinidad Colorado, No. 7 Geo. E 

 Osterhout, 1898. 



Astragalus gracilentus var. fallax (Watson) Jones Cont. 8 14 

 (1898). Pod- obliquely oblong-oval, to ovate, about as in the preced- 

 ing variety but ventral suture rather convex above and not sulcate, 

 pods short hairy, abruptly stipitate the stipe being nearly as long as 

 calyx. Flowers much as in the type but about 1.5 cm. long, and stub- 

 by. P>anner oval, about equaling the wings and not much longer than 

 keel. Calyx teeth rudimentary, deltoid, the tube inserted at right an- 

 gles to the pedicel, very oblique on the lower side and convex above, 

 about 5-7 mm. long. Peduncles stout, much longer than the leaves. 

 Leaflets 3-15 mm. long, cuneate-oblong to nearly linear. Stipules 

 and bracts very broad and very short. In the pine forests of the San 

 Francisco plateau of northern Arizona, on gravelly mesas. Middle 

 Temperate life zone. It blooms in summer. 



Astragalus coriaceus Ilemsley Bot. Cent. Am. 1 263 (1880). Pods 

 arcuate, cylindrical, about 2 cm. long and 7 mm. wide, with acuminate 

 beak, sessile, smooth. Flowers racemose on short pedicels, few, about 

 I.S cm. long. Calyx tube short-cylindric, teeth subulate and about 



