238 PROCEEDINGS OF THE AMERICAN ACADEMY. 
detail with the ériginal and with Dr. Watson’s description; they show, 
moreover, that the slender upright stems originate from a distinctly 
perennial base. 
Cassia (§ Chamaechristae) leptadenia, n. sp. Annual: stem 
simple or branched, erect, 1 to 4 dm. high, pubescent with an upwardly 
subappressed puberulence commonly intermixed with long horizontally 
spreading hairs: leaves short-petiolate, 1 to 5 cm. long, 1 to nearly 2 
em. broad; leaflets sessile, usually 24 to 36 (sometimes fewer), linear- 
oblong, 5 to 10 mm. long, 1 to 2.5 mm. broad, mucronate, rather con- 
spicuously ciliate, glabrous on both surfaces or with a few scattered hairs 
beneath, somewhat oblique at the base; rhachis pubescent with long 
spreading hairs, slightly canaliculate above, bearing just below the first 
pair of leaflets a stipitate tack-shaped gland; petioles 2 to 5 mm. long; 
stipules oblique-lanceolate, 3 to 6 mm. long, ciliate: flowers 1 to 3, on 
short axillary or supra-axillary branches, small, about 0.5 cm. long, and 
less than 1 em. in diameter; pedicels 3 to 5 mm. long, 1-2-bracteate 
above the middle, somewhat elongated at maturity; sepals lanceolate, 
acute, slightly pubescent: petals unequal, pinkish or yellowish-pink ; 
stamens 5 to 8, of different lengths: ovary appressed-pubescent : legume 
2 to 4.5 em. long, 8 to 4 mm. broad, on upwardly arched pedicels, subap- 
pressed-pubescent : seeds flat, oblique, about 2.5 mm. long. — C. nictitans, 
Gray, Pl. Wright. 1: 59 (1852), not L.; Torr. Bot. Mex. Bound. 59, not Ls 
Rothrock in Wheeler’s Report, 106, not L. — Unitep States. Texas: 
gravelly plains near Comanche Springs, Dr. /. M. Bigelow (hb. Gr.) 3 
43 km. east of El Paso, May to October, 1849, Chas. Wright, no. 154 
(hb. Gr.). New Mexico: without locality and number, Chas. Wright, 
coll. of 1851 (hb. Gr.); Organ Mts., 1 September, 1897, Z. O. Wooton, 
no. 435 (hb. Gr.), distributed as “ Cassia calyco'des, DC.” ; Florida Mts., 
27 August 1895, A. I Mulford, no. 1038* (hb. Gr.). Arizona: without 
locality, coll. of 1884, ©. G. Pringle, no. 92 (hb. Gr.); Blue River, 
Clifton, 1 September, 1903, Dr. A. Davidson, no. 1340 (hb. Gr.); 
Sonoita Valley, 1874, Dr. J. T. Rothrock, no. 629 (hb. Gr.). Mexico. 
State of Sonora: Ojo de Gavilan, August, 1851, Geo. Thurber, no. 1060 
(hb. Gr.). State of Durango: vicinity of the city of Durango, April to 
November, 1896, Dr. Hd. Palmer, no. 654 (hb. Gr.). State of Oaxaca: 
Valley of Etla, September, 1895, C. Alvarez, no. 754 (hb. Gr.). 
Var. mensalis, n. var. Stem 3 to 5 dm. high: leaves 2.5 to 9 cm. 
long; leaflets 12 to 50 (6 to 25 pairs), 1 to 1.5 cm. long, 2 to 3 mm. 
oad; pedicels 2 to 8 mm. long: other characters of the specie’. — 
Mexico. State of Chihuahua: Hacienda San Miguel, near Batopilas, 
‘nae 
ree 
Sonat 
