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Erect Knotweed - Polygonum erectum
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General Description
Annual. Stems erect, branched, 10–50 cm. Leaves crowded, lanceolate to elliptic, veiny, short-petiolate, 15–40 mm long; stipules 4–8 mm long, shredding into fibers. Flowers 3–4 mm long, 1 to 5 in leaf axils; pedicels erect, 3–7 mm long; tepals green with yellowish margins. Achene 3-angled, tan, 2–4 mm long (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).
Range Comments
AB to QC south to NV, NM, LA and AL (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).
Observations in Montana Natural Heritage Program Database
Number of Observations: 17
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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
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