CATALOGUE. 101 



decumbent, a span high, puberulent and somewhat villous or glabrous: 

 leaflets 2, ovate to linear, a half to an inch long, mostly acute and ciliate ; 

 stipules narrow, auricled downward at base and peltately attached, as also 

 the floral bracts, which are closely appressed, ovate to lanceolate, 4 to 6 

 lines long, and. nearly including the flower : pod small, included in the 

 bracts or a little exserted. — A variable species, ranging from Arizona and 

 New Mexico to Brazil, and also in the East and West Indies; Sanoita 

 Valley, Ariz., Rothrock (620). 



Desmodium cinerascens, Gray (PI. "Wright, ii, 48). — Perennial, 

 decumbent or procumbent, cinereous with soft appressed hairs, the rather 

 stout straight stems 2 to 4 feet long : leaflets elliptic-oblong, obtuse at each 

 end, an inch or two long, exceeding the petiole, conspicuously marked 

 beneath by the white-silky veins : racemes paniculate, many-flowered : 

 flowers purple, 3 or .4 lines long, on shorter pedicels: pods 5-7-jointed, 

 nearly equally constricted on both edges, puberulent ; joints 2 or 3 lines 

 long. — Arizona to Northern Mexico ; Sanoita Valley, Ariz., Rothrock (660). 



Desmodium Neo-Mexicanum, Gray (PI. Wright, i, 53). (D. exiyuum. 

 Gray, I. c. ii, 46.) — Annual, very slender, erect, a foot or two high or more, 

 sometimes procumbent, pubescent with very short spreading and some- 

 what glandular hairs, paniculately branched: leaflets 3, linear (or the 

 lowermost ovate and shorter), an inch or two long or more, thin and 

 reticulated, the narrow petioles an inch long or less : flowers minute (about 

 a* line long), on very slender, elongated pedicels, purple : pods 1-5-rjointed, 

 puberulent ; joints rounded, reticulated, a line and a half long, the margins 

 often undulate. — Var. Bigelovii (D. Bigelovii, Gray, I. c. ii, 47). Leaves 

 somewhat broader near the base. — From New Mexico to Arizona and North- 

 ern Mexico; in Central Arizona, Loew, 1873, also in Sanoita Valley, Rothrock 

 (632, 663), the latter number referable to the variety. 



Desmodium batocaulon, Gray (PI. Wright, ii, 47). — Stem elongated, 

 procumbent, pubescent and adhesive by hooked hairs : leaflets 3, oblong- 

 lanceolate, 1 to 2£ inches long, obtuse or acutish, rounded at base, some- 

 what pubescent with straight hairs, which are spreading upon the petiole : 

 flowers purple, in loose elongated racemes, 3 to 6 lines long, on slender 

 pedicels nearly as long ; bracts broadly ovate, acuminate, 2 lines long, 



