312 BOTANY. 



spicuously pedicellate flowers; calyx pubescent, the segments narrowly 

 oblong, acute, nearly equal; acheniura turgidly ovate-lenticular, pointed.— 

 First collected by Fremont in Nevada; rather frequent in the Truckee, 

 Humboldt and UnionviUe 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^ beevicoenu, Torr. T. 8^ G., I. c, p. 196. Annual, 

 grayish-puberulent, about 4' high ; leaves mostly radical, linear 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 eigida, Torr. T. 8^ G., I. c, p. 198. Annual, at first 

 woolly ; stem l-l' 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 cylindric, 

 obtuse at base ; stamens 9, inserted on the throat, with short filaments and 

 anthers. — Bracteal spines becoming V 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- 



1 CHOEIZANTHE, E. Brown. (Including Mueroma, Bentli. and Acanthogonum, Torr.) Involucre 

 1-flowered, gamophyllous, not appendaged at base, the tube usually angled or costate, the 2-6 teeth or 

 lobes usually unequal and almost always terminated by a cusp or awn. Flower included or slightly ex- 

 serted, subsessile or shortly pedicelled. Perigonium thin or petaloid, 6-lobed or ported. Stamens 9, 

 rarely 3 or 6. Acheninm triangular. Embryo as in EHogonum, sometimes straight with rather narrow 

 cotyledons, sometimes inourved-eccentric, or with broad cotyledons more or less accumbent to the radi- 

 cle.— Low ; involucres sessile, in cymes or scattered ; leaves opposite and -Verticillate, or the lower usually 

 alternate. T. & G., l> c, 



