106 BOTANY. 



lines long; a gland between the leaflets: stipules and bracts setaceous: 

 peduncles axillary, 1-2 -flowered, a little exceeding the petioles: sepals 

 oblong-ovate: petals veined, 4 to 6 lines long: stamens 7: pods hispid, an 

 inch long or more, nearly straight, compressed, 2-valved, many-seeded. — 

 Western Texas to Arizona; at Camp Bowie and Cottonwood, Ariz., Roth- 

 rock (1007, 360). 



Cassia Covesii, Gray (Proc Am. Acad, vii, 399). — Resembling the 

 last, but more canescent, with 2 or 3 pairs of leaflets, and the 3-7-flowered 

 peduncles exceeding the leaves: pods appressed-pubescent. — From Arizona 

 to Lower California; collected in Northern Arizona in 1871, locality not 

 given. 



Cassia armata, Watson (Proc. Am. Acad, xi, 136).— Perennial, herba- 

 ceous, 3 feet high, minutely puberulent, light green : leaflets 2 or 3 pairs, 

 distant, upon an elongated rigid flattened spinulose rhachis, thick, round- 

 ovate, a line or two in diameter, acutish, the margin re volute; stipules and 

 glands wanting: flowers yellow, 2 or 3 lines long, in a short terminal 

 raceme: stamens 7 : ovary slightly pubescent ; pod glabrate, shortly stipi- 

 tate, linear, compressed, somewhat curved, many-seeded. — Known only 

 from imperfect specimens collected in Western Arizona in 1871, and also 

 previously by Dr. Cooper in the California Desert. 



Cassia Wbightii, Gray (PL Wright, ii, nO). — Perennial, woody at 

 base, with numerous slender ascending stems, glabrous, a foot high: leaflets 

 4 to 6 pairs, narrowly oblong, obtuse, 2 or 3 lines long, thin, the midvein 

 nearer the upper edge ; stipules subulate, nerved; a stipitate gland below 

 the lowest leaflets : pedicels solitary, axillary, exceeding the leaves, spread- 

 ing : sepals membranaceous, unequal, 4 or 5 lines long: petals clear yellow, 

 a half longer: pods linear, flat, shortly stipitate, an inch long or more, 

 6-8-seeded. — New Mexico and Arizona : at Camp Crittenden, Rothrock 

 (683). 



Cassia nictitans, Linn. — From Arizona to the Atlantic and southward; 

 in Sanoita Valley, Rothrock (629). 



Prosopis juliflora, DC. (Benth. Rev. Mim. 377). (P. glandulosa, 

 Ton- ) — Shrub or tree, becoming 30 or 10 feel high, glabrous or puberulent, 

 often with stout axillary spines : leaflets 6 to 30 pairs, oblong to linear, 



