Inflati 107 



longer than wings and 2 mm. longer than keel. Wings obliquely 

 obovate a trifle arched 1 mm. wide, as wide as keel, very 

 obtuse, concave to keel, si)reading, nearly horizontal and the right 

 hand one the more, at tip. Keel about 1 mm. long abruptly arched to 

 a half circle, very obtuse. Calyx tube about hemispherical, deeper 

 cleft above, 1-1.5 mm. long, nigrescent, a trifle laterally flattened, ob- 

 lique at tip, with the deltoid teeth shorter than the tube. Pedicels slen- 

 der, reflexed, about 2 mm. long. Bracts very thin and hyaline, shorter 

 than the mature pedicels, triangular. Peduncles about 1 dm. long, 

 often shorter than the floral rachis, in all the upper axils, sulcarte. 

 Leaves widely spreading, 3-10 cm. long, very delicate and quickly 

 wilting, nearly sessile, with filiform rachis. Leaflets 6-12 pairs, 

 linear-oblong to oval-ovate distant or not contiguous, 4-12 mm. long, 

 conspicuously petiolulate, obtuse to retuse, 2-5 mm. wide, nearly 

 smoooth . Stipules minute, subulate, not connate. Stems biennial or 

 short-lived perennials, 2-3 ft. high and racenosely branched from a 

 woody and erect root. This has the habit of A. Rusbyi and the deli- 

 cate and erect Daleas. The pods are nearly the shape of A. sesquiflo- 

 rus (but reversed) and leptaleus and Guatamalensis, but is not related 

 to any of them unless it be the latter. It grows among the oaks 

 along streams in the lower edge of the Middle Temperate life zone, 

 in the Sierra Madres of Chihuahua Mexico, at 6000 to 9500 ft. alt. 

 Blooming in fall. 



Astragalus scalaris van. quercetinus n. var. Pods conspicuously 

 stipitate, the stipe about as long as calyx. Pedicels twice as long. 

 Leaflets elliptical-ovate to oval-ovate. Plants about 3 feet high and 

 with innumerable branches. Sierra Madre Mts. Chihuahua. San 

 Diego Canon Sept. 16, 1903, Middle Temperate life zone. All sorts 

 of intergrades occur. 



51. Astragalus Ward! Gray Proc. Am. Acad. 12 55 (1876). Phaca 

 Rydberg. Pods almost oval, inclined to be triangular-acute at both 

 ends, straight, scarcely at all oblique, smooth, mottled, with round cross 

 section except for a slight groove ventrally, the minute tip flattened 

 and cuspid;! te, seed-bearing only in the middle and ventral suture in- 

 truded about one half mm., inclined to have a round false-stipe 1-2 

 mm. thick by the narrowing of the pod at the calyx but without any- 

 thing but a mere rudiment of a true stipe. Flowers white or nearly so 

 about 5 vm. long, ascending b it soon pendent, aiched as in A. pictus. 

 Banner about 3 mm. long, arched abruptly to fully erect at calyx tips, 

 greenish-white with tinge of yellow, purple-streaked below with fine 

 lines; gro've about 2 mm. wide and forming one third circle, about 1 

 mm. deep, a little shallower nbove and a little narrowed and deeper 

 below; sides reflexed onposite the calyx tips a very little; blade oblong, 

 to oval, rounded at tip and with sharp notch. Wings oblong-ovate, 

 arched 45 degrees, mrrowei at the almost acute and incurved tip 

 about 2 T>-m. wide and 1 mm. longer than kpel, and nearly 2 mm. 

 shorter thin banner, close-pressed to near the keel- tip, then con- 

 cave to it and the left hand one spreading with the lower edge 

 turned out. the other bent over keel at tip and close-pressed to tip, 

 not streaked. Keel a little deflexed at calyx tips, at the end sharply 

 incurved to IIR deg'-ees nbti.se. y'llow-tipped, barely 1 mm. longer 

 than calyx, about 2 mm. high. Calyx obliquely carapanulate, the tube 

 about 2 mm. long, with base straight, and the upper side arched to 

 near a quarter circle, attached on the lower acute corner which is 

 fleshy, cleft a little deejier above, with a broad sinus, obcompressed at 

 tip, with scattered black hairs, teeth subulate to triangular and about 

 as long. Pedicels in fruit filiform, often 4 mm. long and longer than 

 the delicate triangular bmcts. Peduncles axillary throughout, filiform, 

 shorter than the leaves, the floral rachis at least as long. 5-15 flowered. 

 Leaves rarely 2 dm. long, lax and thin, the upper almost sessile. 



