Prostrate Amaranth - Amaranthus blitoides
Amaranthus graecizans [misapplied]
(see State Rank Reason below)
MNPS Threat Rank
State Rank Reason (see State Rank above)
Native to parts of North America, may be introduced into Montana.
Monoecious. Stems branched at the base, prostrate to ascending, 5–50 cm with glabrous to pubescent foliage. Leaf blade obovate, 10–25 mm long, mostly longer than the petiole. Inflorescence axillary glomerules; bracts broadly lanceolate, 2–3 mm long with a spine tip. Flowers: sepals 3 to 5, narrowly ovate, acuminate, 2–3 mm long; stamens 3. Utricle 2–3 mm, as long as sepals; seed ca. 1.3 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Across most of MT; native to the West but throughout North America, also completely naturalized in parts of South Amererica, Eurasia, and other regions (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX; Welsh 2003 in Fl. N. Amer. Vol. 4).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Disturbed soil of fields, roadsides, margins of streams, ponds; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
- Additional ReferencesLegend: View Online Publication
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- Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
- Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
- Sirirugsa, P. 1973. Descriptive analysis of Montana species of Amaranthus. M.Sc. Thesis. Bozeman, MT: Montana State University. 56 p.