92 BOTANY. 



eel, or rarely shortly pedunculate : leaflets mostly linear, palmate upon a 

 very short petiole or sessile. — New Mexico and Arizona ; Willow Springs, 

 Loew (1114), and White Mountains, Arizona, Loew (1113), and Fort Win- 

 gate, N. Mex., Rothrock (152). 



Hosackia Purshiana, Benth. — Annual, usually a foot high or more, 

 and more or less silky- villous: leaflets 1 to 5, ovate to narrowly lanceolate, 

 2 to 9 lines long ; stipules gland-like : flowers small, yellow, on pedun- 

 cles exceeding the leaves, bracteate with a single leaflet: calyx-teeth linear, 

 much exceeding the tube, about equalling the corolla: pod linear, straight, 

 smooth, an inch long, 5-7-seeded. — Frequent from the Mississippi to the 

 Pacific; Nevada, 1871, and Camp Grant, Ariz. (368). 



Tephrosia leiocarpa, Gray (PI. Wright, ii, 36). — Perennial, erect, 

 rather stout, a foot high or more, with a fine, appressed, silky pubescence : 

 leaflets 6 to 10 pairs, linear-oblong, obtuse, mucronate, smooth above, 

 shortly petiolulate, about an inch long : peduncles terminal and axillary, 

 scarcely exceeding the leaves, rather few-flowered: calyx-lobes subulate, as 

 long as the tube ; petals large, purple, 9 lines long : pods linear, straight, 

 glabrous, two inches long by three lines wide, sessile, about 10-seeded. — 

 Arizona, Sanoita Valley, Rothrock (685), near the original locality, where 

 only it had been collected by Mr. Wright. — Very near T. onobrychoides, 

 Nutt. Differing in its short peduncles and smooth pods. 



Tephrosia leucantha, H. B. K. (Nov. Gen. vi, 460, t. 577). — Peren- 

 nial, erect or ascending, rather stout, about a foot high, appressed-pubescent 

 and somewhat rusty silky-villous throughout, the hairs upon the petioles 

 spreading: leaflets 5 to 12 pairs, oblong, rounded at each end, mucronate, an 

 inch long : raceme terminal, short and shortly peduncled : flowers yellow, 6 

 or 7 lines long, exceeding the erect slender pedicels : calyx very villous, the 

 slender lower teeth longer than the tube : style pubescent: pods narrowly 

 linear, straight, spreading, densely rusty pubescent with short spreading 

 hairs. — Southern Arizona, apparently identical with the typical form of 

 Central Mexico; in Sanoita Valley, Rothrock (625). 



Tephrosia tenella, Gray (PI. Wright, ii, 36) — Annual, erect, very 

 slender, a span high or less, nearly glabrous: leaflets 1 to 3 pairs, thin, 

 linear, obtuse, mucronate, an inch long : flowers few, in an interrupted 



