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 Covusu, 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 revolute; 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 Wricutu, Gray (Pl. Wright. ii, 50)—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 JutirLorA, DC. (Benth. Rev. Mim. 377). (P. glandulosa, 
Torr.)—Shrub or tree, becoming 30 or 40 feet high, glabrous or puberulent, 
often with stout axillary spines: leaflets 6 to 30 pairs, oblong to linear, 
