OF ARTS AND SCIENCES. 93 



cotyledons thick : albumen scanty or none. — Perennials, woody at base, 

 with scattered linear terete leaves. 



1. K. Americana. Stems erect and virgate, mostly simple, 6-18 

 inches high, tomentose and somewhat villous or nearly glabrous ; leaves 

 3-12 lines long, cuspidate or acutish, ascending; flowers mostly with 

 rudimentary stamens, 1-3 in each axil, densely white-tomentose, nearly 

 a line broad in fruit and the membranous wing often as broad or broader, 

 the cuneate-rounded segments nerved and subcrenulate ; ovary ovate, 

 densely tomentose at the apex, much shorter than the calyx and the 

 elongated exserted styles ; fruit nearly smooth, scarcely apiculate ; seed 

 I of a line broad, without albumen, the acuminate radicle-sheath pai'- 

 tially including the cotyledons. — Foothills and valleys from Northern 

 Nevada to Southern Wyoming and southward to Arizona and Southern 

 Colorado. It much resembles K. prostrata of the Old World, to which 

 it has hitherto been referred, but which ditFers especially in its glabrous 

 utricle being prominently beaked below the style, in its larger seed with 

 a scanty albumen, and in the radicle-sheath less prolonged. The genus 

 shows an approach to Suceda and the Spirolobece in the want of albu- 

 men and the somewhat more than annular embryo. The Kochia dioica 

 of Nuttall proves to be Glienopodium Endolepis, the Endolepis Siic/c- 

 leyana of Torrey. 



Kochia prostrata. Hook. PI. Geyer in Lond. Jour. Bot. 5. 262 ; not 

 Schrad. "Watson, King's Rep. 5. 293, in part. Coulter, Hayden's Rep., 

 1872, 779. 



Collectors : — 465 Torrey ; 992 Watson ; Greene ; Wheeler. 



Var. VESTiTA. Densely villous throughout and subtomentose ; ovary 

 oblong, nearly equalling the calyx, very pubescent. — vShores of Great 

 Salt Lake (991 Watson), and on the line of the Pacific Railroad in 

 Nevada or Utah (Burgess). 



8. CHENOPODIUM, Linn. 



Flowers perfect, or sometimes pistillate, bractless. Calyx 5- (rarely 

 3_4_) parted, the lobes usually somewhat carinate or crested. Stamens 

 5. Ovary depressed : styles 2, rarely 3 or 4, slender. Pericarp mem- 

 branous, closely investing the seed and more or less completely en- 

 veloped by the dry calyx. Seed lenticular, with crustaceous testa, 

 sometimes vertical in § Botryois. — Herbaceous and mostly annual, 

 usually white-mealy or glandular, with alternate petioled leaves and 

 sessile clustered flowers in axillary and terminal or panicled spikes. 



