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4. CHENOPODIUM L. (Goosrroor, PIGWEED.) 
Mostly annual weeds which flower through late summer or autumn and 
are usually mealy or glandular, with perfect (sometimes pistillate) sessile 
flowers in small clusters collected in spiked panicles, 5 (rarely 4) -parted 
or -lobed calyx more or less enveloping the depressed fruit, mostly 5 
stamens, filiform filaments, 2 (rarely 3) styles, and lenticular seeds. 
* Annual, more or less mealy, not glandular or aromatic: fruiting calyx dry: seeds 
horizontal, 
+ Leaves entire or rarely sinuate-dentate: pericarp very easily separated from the seed, 
1. C. Boscianum Moq. Erecct, slender, 6 dm, high, loosely branched, often nearly 
glabrous: leaves oblong- to linear-lanceolate (1.5 to 3 cm. long), attenuate into a 
slender petiole, acute, the lower sinuate-dentate or often all entire: flowers small, 
solitary, or in small clusters upon the slender branchlets: calyx not strongly keeled, 
(C. album, var. Boscianum Gray.)—Extending into Texas from the Atlantic States. 
2. C. leptophyllum Nutt. Densely mealy (varely nearly glabrous), 1.5 to 4.5 dm, 
high, simple or branched, often strict: leaves linear (1.5 to 2.5 em. long), entire, 
rather short-petioled: flowers closely clustered, in dense or interrupted spikes: 
calyx-lobes strongly keeled.—From Tom Greene County to New Mexico. Var. 
OBLONGIFOLIUM Watson is rather stout (15 to 25 em. high), branched and densely 
mealy, with oblong often slightly hastate leaves (1 to 2 em. long), and short close 
spikes.—Near the Mexican border. 
+ + Leaves more or less sinuate-dentale: pericarp persistent upon the smooth seed: mostly 
: introduced species. 
3. C. Berlandieri Moq. Somewhat mealy or nearly smooth, 6 to 9 dm, high, the 
branches slender and loosely spreading: leaves rhombic-oblong or oblong-lanceolate, 
2.5 em. long or less, subhastate, sinuate-dentate (teeth acute), setaceously acuminate : 
flowers mostly in slender loose interrupted spikes. —Southern and eastern Texas, 
4. C. album L. (Lamb’s Quarters.) Erect, 3 to 12 dm. high, more or less mealy: 
leaves varying from rhombic-ovate to lanceolate, or the uppermost even linear, 
acute, all or only the lower more or less angulate-toothed : clusters spiked-panicled, 
mostly dense: calyx (1.5 mm. broad in fruit) with strongly keeled lobes, nearly or 
quite covering the fruit.—Introduced every where, Var. VIRIDE Mog. is less mealy, 
with less dense inflorescence, and is not so common. 
5. C.hybridum L. (Maphi-LeEAVED GOOSEFOOT.) Bright green throughout: stems 
widely much branched (6 to 12 dm. high): leaves thin (5 to 15 em, long), somewhat 
triangular and cordate, taper pointed, sinuate-angled, the angles extending into a 
few large and pointed teeth: racemes diffusely and loosely panicled, leafless: calyx 
not fully covering the fruit, its lobes keeled.—From Texas and New Mexico to Ken- 
tucky and Oregon. 
6. C. murale L. Slightly mealy, stout, ascending or decumbent, 3 to 6 dm. high, 
leaves rhomboid-ovate, acute, coarsely and sharply unequally toothed, thin, bright 
green: spikes or racemes diverging, somewhat corymbed, axillary (usually shorter 
than the leaves): calyx-lobes scarcely keeled: seed sharp-edged.—In the streets of 
Corpus Christi. 
* * Annual, glabrous: fruiting calyx more or less fleshy (dry in all others) and often col- 
ored, inelosing the utricle: seed mostly vertical: flowers in crowded clusters, axillary 
or in spikes. 
7. C. rubrum L. (Coast suite.) Stems angled, much branched: leaves thickish, 
triangular-lanceolate, tapering below into a cuneate base, and above into a slender 
point, sparingly and coarsely toothed, the upper linear-lanceolate: clusters scattered 
in axillary leafy spikes: calyx-lobes 2 to 4, rather fleshy: stamens 1 or 2. (Blitum 
maritimum Nutt.) —Saline and alkaline soils, northwestern Texas to Kansas. 
