Amaranthus cruentus |
Amaranthus blitoides(synonym of Amaranthus graecizans) |
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prostrate pigweed, tumbleweed amaranth |
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Habit | Plants glabrous. | |
Stems | prostrate to ascending; much branched from bases; mat-forming, 2–6(10) dm. |
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Leaves | blades obovate to spatulate, 1–3(4) cm; margins entire; flat to wavy or crisped, bases wedge-shaped; midveins extending to a short weak spine; tips obtuse to rounded; petioles 7–30 mm; ? ½ as long as blade. |
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Inflorescences | axillary clusters of flowers, green, staminate and pistillate flowers intermixed; bracts leaf-like; narrow and thin, 1–3(4) mm. |
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Staminate flowers | few; perianth segments 3(4), 1.5–2.5 mm, scarious; stamens 3. |
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Pistillate flowers | perianth segments (3)4–5, unequal, 1–3 mm; styles 3, becoming reflexed. |
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Fruits | ovoid to elliptic, 1.7–2.5 mm, bases smooth, rugose at tips; dehiscence circumscissile. |
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Seeds | lenticular, elliptic; plump, 1.1–1.7 mm, dark brown to black; shiny to somewhat dull. |
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2n | =32. |
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Amaranthus cruentus |
Amaranthus blitoides |
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Distribution | ||
Discussion | Disturbed areas, riverbanks, dunes, fields. Flowering Jun–Sep. 50–1700 m. BR, BW, Col, ECas, Lava, Owy, Sisk. CA, ID, NV, WA; nearly worldwide. Native? See also A. albus. |
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Source | Flora of Oregon, volume 2, page 65 Bridget Chipman |
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Sibling taxa | ||
Synonyms | Amaranthus graecizans | |
Web links |
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