I. Chenopodum Album L. Lamb's Quarters. White Goosefoot. Pigweed

Fig. 1677

Chenopodium album L. Sp. Pl. 219. 1753. Chenopodium viride L. Sp. Pl. 219. 1753. C. Berlandieri Moq. Enum. Chenop. 23. 1840. C. paganum Reichenb. Fl. Germ. 579. 1830. Chenopodium album viride Moq. in DC. Prodr. 132 71. 1849.

Annual, stem striate and grooved at least when dry, erect, commonly branched, 1°-10° tall. Leaves rhombic-ovate or the upper lanceolate or linear-lanceolate, narrowed at the base, acute, cuspidate or sometimes obtuse at the apex, 3-nerved, white-mealy beneath or sometimes green on both sides, dentate, sinuate lobed, or entire, 1'-4' long; petioles often as long as the blades; spikes terminal and axillary, often panicled; calyx about 1/2" broad in fruit, its segments strongly keeled, usually completely enclosing the utricle; styles short, seed horizontal, black, shining, firmly attached to the pericarp; embryo a complete ring.

I Chenopodum Album L Lamb s Quarters White Goosefo 19

In waste places. A common weed throughout North America except the extreme north. Naturalized from Europe. Native also of Asia. Wild spinach. Frost-blite. Baconweed. Muckweed. Fat-hen. June-Sept. Consists of many races.

2. Chenopodium Incānum (S. Wats.) Heller. Mealy Goosefoot

Fig. 1678

C. Fremonti incanum S. Wats. Proc. Am. Acad. 9: 94.

1874. C. incanum Heller, Plant World 1: 23. 1897.

Annual, densely white-mealy nearly or quite to the base, usually much-branched, 1° high or less, the branches ascending. Leaves ovate to rhombic, 1/2'-1' long, often nearly as wide as long, few-toothed with rather blunt teeth or some of them entire, paler beneath than above, the slender petioles mostly shorter than the blades; spikes short, borne in the upper axils and in terminal panicles; calyx densely mealy.

In dry soil, Nebraska to Wyoming, Kansas and Arizona. May-July.

2 Chenopodium Inc Num S Wats Heller Mealy Goosefoo 20

3. Chenopodium Glaųcum L. Oak-Leaved Goosefoot

Fig. 1679

Chenopodium glaucum L. Sp. Pl. 220. 1753. Blitum glaucum Koch, Syn. Fl. Germ. 608. 1837.

Annual, succulent, stem usually much branched, decumbent or prostrate, or with erect branches, 4'-18' high. Leaves oblong, lanceolate or ovate-lanceolate, slender-petioled or the uppermost nearly sessile, obtuse or acute at the apex, mostly narrowed at the base, white-mealy beneath, dark green above, 1'-2' long, the lower or all of them sinuate-dentate or lobed; flowers in small axillary often branched spikes, the clusters usually shorter than the leaves, or the upper panicled; calyx about 1/2" broad, its segments oblong or obovate, obtuse, neither fleshy nor keeled in fruit; utricle brown, depressed, its summit not completely covered by the calyx; styles short; seed sharp edged, that of lateral flowers vertical, somewhat exserted, that of terminal flowers commonly horizontal; embryo a complete ring.

A weed in waste places throughout North America except the extreme north. Naturalized from Europe; now found in most cultivated areas of the globe. June-Sept.

3 Chenopodium Gla Cum L Oak Leaved Goosefoot 21