Amaranthus rudis J.D.Sauer
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Amaranthaceae
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Scientific Name
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Description
Species Description - Dioecious; stout, erect, 5–20 dm; lvs long-petioled, rhombic-oblong to oval, to 10 cm, the upper narrow and reduced; staminate infl a single long, terminal, spike-like thyrse or of numerous short, panicled branches; pistillate thyrses usually elongate and very slender, single or numerous in a panicle; bracts mostly 1.5–2.5 mm, with heavy, excurrent midrib; male fls with 5 unequal sep, the outer ca 3 mm, acuminate, with conspicuous, excurrent midvein, the inner 2.5 mm, obtuse or emarginate; female fls with 1 or 2 sep, the shorter one vestigial, the other ca 2 mm, narrowly lanceolate, acuminate, with heavy, excurrent midvein; fr 1.5 mm, circumscissile at the middle, thin, rugose; style-branches 3 or 4; seeds plump, suborbicular, 1 mm; 2n=32. Sandy fields and waste places, chiefly in moist soil; Wis. and N.D. to Tex. and Ala., and at scattered stations eastward as an adventive. (Acnida tamariscina and Amaranthus tamariscinus, misapplied)