312 BOTAOT. 
spicuously pedicellate flowers; calyx pul^escent, the segments narrowly 
oblong, acute, nearly equal; aclienium turgidly ovate-lenticular, pointed. — 
First collected by Fremont in Nevada ; rather frequent in the Triickee, 
Humboldt and Unionville Valleys, at the base of the foot-hills ; 4,500 feet 
altitude. May-July. Plate XXXIV. Fig. 1. A plant; natural size. 
Fig. 2. A node, bracts, involucre and flowers ; enlarged three diameters. 
Fig. 3. A flower, expanded ; enlarged eight diameters. (1,043.) 
Chorizanthe^ brevicoenu, Torr. T. S^- G., I. c, p. 19G. Annual, 
grayish-puberulent, about 4' high ; leaves mostly radical, hnear or spatulate- 
obovate, entire ; bracts rather small, uncinate-mucronate ; involucres for the 
most part scattered along the somewhat scattered branches of the panicle, 
narrow-prismatic, 6-costate, the stout ribs excurrent into subulate recurved 
awns terminating the herbaceous nearly equal teeth, which are 3-5 times 
shorter than the tube (2-3" long, and scarcely broad ;) lobes of the calyx 
entire; stamens 3, inserted near the base.— Southeastern California and 
Western Arizona. Base of foot-hills near the Big Bend of the Truckee ; May, 
not yet in flower. (1,044.) 
Chorizanthe rigida, Torr. T. G., I c, p. 198. Annual, at first 
woolly; stem ^-1' high, slightly branched, finally more dense and woody; 
leaves ovate or obovate, 4-8" long, entire, obtuse or acutish, pointless, long- 
petioled, white-tomentose beneath; involucres coriaceous, triangular, 6-costate, 
3-cleft, sessile in the axils, solitary or crowded; lobes not margined, unequal, 
ovate or triangular-lanceolate, terminated by a straight spiny cusp, longer 
than the transversly veined short-campanulate tube; subtending bracts elon- 
gated and awn-shaped or lanceolate, spinescent-cuspidate, at length indurated ; 
flowers pedicelled, with slender bractlets; tube of the 6-lobed calyx cyhndric^ 
obtuse at base ; stamens 9, inserted on the throat, with short filaments and 
anthers.— Bracteal spines becoming h' or more long, and the older involucres 
scarious between the reticulations; calyx yellowish; cotyledons rounded, 
accumbent on the base of the slender curved radicle. Southeastern Cali- 
rarely 3 or A. heniu.n tria n-n.Iar Enibryo^^^^^^^^ ^ 1 ' ^'^'^'^^ l^''^^*'^^^- stamens 9, 
cotyle.lon.. sonu.thu.s in.urv.,l,.c.eatric or wiT ^^^^ ^^"^ rather narrow 
alteniate. T. & G., /. c. ' "'"'"^ ' verticiUate, or the lower usually 
