CHENOPODIACE.E. (GOOSEFOOT FAMILY.) 307 



1. KOCHIA, Roth. 



Perianth subglobose. Stamens 5, usually exserted. Ovary depressed: 

 styles 2, filiform. Pericarp membranous. Woody at the base, with scattered 

 linear terete leaves, and the flowers solitary or few in the axils of the virgate 

 leafy stems. 



1. K. Americana, Watson. Branching at base: stems villous-tomen- 

 tose or nearly glabrous : flowers 1 to 3 in the axils, mostly with abortive 

 stamens : perianth densely white-tomentose ; lobes of the membranous wing 

 cuneate-rounded, nerved and somewhat crenulate : ovary tomentose above. 

 Proc. Am. Acad. ix. 93. K. prostrata of American authors. W. Wyoming 

 to N. W. Nevada and southward to Arizona. 



2. CYCLOLOMA, Moquin. WINGED PIGWEED. 



Calyx with concave lobes strongly keeled, enclosing the depressed fruit. 

 Stamens 5. Styles 3. 



1. C. platyphyllum, Moq. More or less arachnoid-pubescent; whole 

 plant light green or often deep purple. From Colorado to the head-waters of 

 the Missouri and eastward to the Mississippi. 



3. CHE NO PODIUM, L. GOOSEFOOT. PIGWEED. 



Lobes of the perianth usually somewhat keeled or crested, becoming dry, or 

 rarely at length fleshy. Styles 2, rarely 3 or 4. Pericarp membranous, closely 

 investing the seed. Flowers, when in clusters, in interrupted spikes or pani- 

 cled. Many are introduced weeds. Includes Blitum, Tourn., and Teloxys, 

 Moquin. 



1. Not pubescent or glandular, nor aromatic, sometimes somewhat mealy : fruit- 

 ing calyx dry : seed lenticular, horizontal. 



* Pericarp closely persistent: leaves more or less sinuate-dentate (except in 

 No. 1) : seed large (f line broad). 1 



1. C. Olidum, Watson. Farinose, heavy -scented : leaves rather thick, 

 oblong to ovate, often slightly hastate, entire : flowers ratber large, in close 

 clusters rather looselij panicled. Proc. Am. Acad. ix. 96. New Mexico and 

 Arizona to Colorado and N. Utah. 



2. C. hybridum, L. Glabrous throughout or only the inflorescence 

 mealy, rather stout and erect : leaves thin, somewhat triangular and heart-shaped, 

 taper-pointed, sinuate-angled with 2 or 3 large teeth on each side: racemes dif- 

 fusely and loosely panicled : seed with acutish margin. A very common weed 

 everywhere, but apparently indigenous within our range in the mountains 

 from New Mexico and Colorado to Washington Territory. 



3. C. glailClllll, L. Glaucous-mealy, low and spreading; upper surface 

 of the leaves smooth : leaves ovate to oblong-lanceolate, sinuate-dentate : flowers 

 clustered in axillary spikes shorter than the leaves : seed sharp-edged. Proba- 



1 C. album, L., a species introduced everywhere, is mealy and pale, sometimes green, with 

 leaves varying from rhombic-ovate to lanceolate, all or only the lower more or less angulate- 

 toothed. It is usually known as "Pigweed " or " Lamb's Quarters." 



