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Leathery Knotweed - Polygonum achoreum
Native Species
Global Rank:
G5
State Rank:
S4
C-value:
2
Agency Status
USFWS:
USFS:
BLM:
External Links
General Description
Annual, often white with mildew. Stems prostrate to ascending, usually branched at the base,10–30 cm. Leaves short-petiolate; the blades ovate, 7–25 cm long; stipules 5–8 mm long, lacerate. Flowers 3–4 mm long, 1 to 3 in leaf axils; pedicels erect, 1–2 mm long; tepals green with yellowsih margins, the outer keeled at the tip. Achene 3-angled, yellow-brown, 2–3 mm long (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Range Comments
AK to QC south to NV, KS, OH, and NY (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations: 21
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Ecology
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus bifarius,
Bombus flavifrons,
Bombus frigidus,
Bombus melanopygus,
Bombus sylvicola,
Bombus occidentalis,
Bombus pensylvanicus,
Bombus insularis, and
Bombus kirbiellus (Macior 1974, Colla and Dumesh 2010).
References
- Literature Cited AboveLegend:
View Online Publication
Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141:39-68.- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Macior, L.M. 1974. Pollination ecology of the Front Range of the Colorado Rocky Mountains. Melanderia 15: 1-59.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- Eggers, M.J.S. 2005. Riparian vegetation of the Montana Yellowstone and cattle grazing impacts thereon. M.Sc. Thesis. Montana State University, Bozeman, MT. 125 p.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 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.
- Rundquist, V.M. 1973. Avian ecology on stock ponds in two vegetational types in north-central Montana. Ph.D. Dissertation. Bozeman, MT: Montana State University. 112 p.
- Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
- Web Search Engines for Articles on "Leathery Knotweed"
