378 CHEN0P0DIACE2E. (GOOSEFOOT FAMILY.) 
4. CHENOPODIUM, L. Goosefoot. Pigweed. 
Flowers perfect, all bractless. Calyx 5-parted, not appendaged 
or becoming succulent, more or less enveloping the depressed fruit. 
Stamens 5 . Styles 2. Seed horizontal, lenticular : embryo coil¬ 
ed into a ring perfectly encircling the mealy albumen. — Smooth 
weeds, usually more or less covered with a white mealiness ; the 
leaves petioled, triangular or rhombic, toothed or entire. Flowers 
sessile in small clusters collected in spiked panicles. (Name from 
Xrjv, a goose , and rrovs,foot, in allusion to the shape of the leaves.) 
— Our species are all annuals, flowering through the summer, 
growing around dwellings, in manured soil, cultivated grounds, 
&c., and were doubtless all introduced from the Old World. 
1. €. album, L. (Lamb’s-quarters.) Stem upright, some¬ 
what branched; leaves rhomboid-ovate with a wedge-shaped entire base , 
coarsely sinuate-toothed, pale , mealy-whitened underneath , the upper¬ 
most oblong-linear and entire; panicled racemes spiked, somewhat 
leafless, compact; calyx-lobes keeled on the back in fruit; seed smooth 
and shining, with acute margins. — Very common about gardens; the 
leaves whitish-mealy on the lower or both sides: a greener variety is 
the C. viride of most authors. The true C. viride, L., which is per¬ 
haps in the country, is said to have a minutely-dotted seed with rather 
obtuse margins. 
2. C. glaucum, L. (Oak-leafed Goosefoot.) Stems as¬ 
cending or prostrate, much branched ; leaves ovate-oblong , obtuse , sin¬ 
uate or toothed , mealy-whitened underneath ; racemes spiked, ifther 
dense, ascending, leafless; calyx-lobes not keeled ; seeds smooth and 
shining, with acute margins. — Not common. (Philadelphia, Dr. 
Bromjield.) 
3. C* urbicum, L. (Triangular-leaved Goosefoot.) Stem 
erect, branching; leaves triangular-acute , coarsely sinuate-toothed , green 
both sides; the uppermost lanceolate-linear and almost entire; ra¬ 
cemes spiked-panicled , strictly erect ; calyx-lobes not keeled ; seed ob¬ 
scurely wrinkled-dotted, shining, with obtuse margins. — Var. rhombi- 
folium, Moquin (C. rhombifolium, Muhl .), has rather rhombic leaves 
with more prolonged teeth.— Not very common. 
4. C. murale, L. (Nettle-leaved Goosefoot.) Stem as¬ 
cending, branched ; leaves ovate-rhomboid , acute } coarsely and unequal¬ 
ly toothed , green and shining both sides; racemes somewhat corymbed 
and loose; calyx-lobes slightly keeled in fruit; seed dotted-wrinkled, 
with acute margins. — Rare. Boston Common, Tuckerman. 
5. liybriclum, L. (Maple-leaved Goosefoot.) Stem 
erect, much branched; leaves (large) ovate , heart-shaped at the base , 
