An Illustrated Guide to ARIZONA WEEDS

The University of Arizona Press

COMMON LAMBSQUARTERS

Illustration

GOOSEFOOT FAMILY-Chenopodiaceae

COMMON LAMBSQUARTERS-Chenopodium album L.

DESCRIPTION-Common lambsquarters is a pale green annual with one main stem or several, 1 to 4 or 6 feet high, which reproduces by seeds. The plant is more or less white mealy throughout, particularly the flowers, and usually the lower sides of the leaves. The variable leaves may be lanceshaped and smoothedged, or somewhat egg- or wedgeshaped, with a pair of lobes at the base, and often with toothed margins. The leaves are alternate, 1 to 5 inches long, and 1/2 to 2 inches broad.

The small inconspicuous greenish flowers are stalkless, arranged in crowded clusters on the short flower clusters at the tips of the stem branches. The black seed is persistently enclosed by the thin membranous fruit wall, which gives it a dull appearance. If this membrane is scraped away, the seed is shiny and glossy, about 1/16 inch in diameter, and diskshaped, with a notch on one side.

DISTRIBUTION-Lambsquarters is a nuisance in irrigated lands and cultivated crops. It is also found on river bottoms and eroded areas of overgrazed ranges, brush burns or logged forest openings, in the desert or desert grassland, pinyon- juniper and yellow pine throughout most of the state; 100 to 9,500 feet elevation; flowering from early summer to fall, May to October. A native of Europe, this weed is good livestock feed.

Copyright (c) 1972 The Arizona Board of Regents



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