UW Burke Herbarium species comparison

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Chenopodium album

lambsquarters, pigweed
Habit Erect or rounded, freely-branched annual, 2-10 dm. tall, greenish to grayish with a mealy coating, often tinged with red in age.
Leaves

Leaves alternate, usually firm and somewhat succulent, the blade ovate to rhombic with a wedge-shaped base, 3-10 cm. long, mostly shallowly to deeply wavy-toothed, with a slender, short petiole.
Flowers

Flowers perfect, glomerate in large, terminal panicles;

perianth 5-cleft to below the middle, with a mealy coating, becoming strongly keeled and completely covering the fruit;

stamens 5, opposite the perianth lobes;

styles 2, short.
Fruits

Utricle.

Chenopodium album
Flowering time June-September
Habitat Fields, roadsides, forest edge, wastelots, and other disturbed areas.
Distribution
Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Introduced from Europe, but some populations in the Midwest may be native to North America, according to FNA
Conservation status Not of concern
Sibling taxa
C. atrovirens, C. berlandieri, C. fremontii, C. incognitum, C. leptophyllum, C. opulifolium, C. pratericola, C. ×schulzeanum, C. strictum, C. subglabrum
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Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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