Difference between revisions of "Polygonum aviculare subsp. rurivagum"
Fl. Vosges, 195. 1887.
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|common_names=Narrow-leaf knotweed | |common_names=Narrow-leaf knotweed | ||
| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Polygonum rurivagum | |name=Polygonum rurivagum | ||
|authority=Jordan ex Boreau | |authority=Jordan ex Boreau | ||
| + | |publication_title=Fl. Centre France ed. | ||
| + | |publication_place=3, 2: 560. 1857 | ||
}} | }} | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
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|publication year=1887 | |publication year=1887 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V5/V5_1142.xml |
|subfamily=Polygonaceae subfam. Polygonoideae | |subfamily=Polygonaceae subfam. Polygonoideae | ||
|genus=Polygonum | |genus=Polygonum | ||
Revision as of 20:06, 24 September 2019
Plants green, homophyllous to heterophyllous. Stems 1–10, procumbent to ascending, branched at most nodes, proximal branches divaricate, not wiry, 10–40 cm. Leaves: ocrea (6–)8–12 mm, proximal part cylindric, distal part with veins conspicuous, soon disintegrating into persistent fibers; petiole 0.3–2 mm; blade green, lateral veins strongly raised adaxially, narrowly elliptic to linear-lanceolate, (10–)15–27(–30) × 0.5–4.8(–8) mm, (4.5–)5–15(–19) times as long as wide, apex acute; stem leaves 1.2–2.4 times as long as branch leaves. Cymes uniformly distributed along stems and branches, 1–3-flowered. Pedicels enclosed in or exserted from ocreae, 1.5–3 mm. Flowers: perianth 2.2–3.1 mm, 1.6–2.6 times as long as wide; tube 26–40(–42)% of perianth length; tepals often not overlapping, green with pink or red margins, oblong, ± cucullate, outer tepals not pouched at base; veins branched, moderately to strongly thickened; stamens 7–8. Achenes usually exserted from perianth, blackish brown, ovate, 3-gonous, 2.1–2.6(–3) mm, faces subequal or unequal, flat to concave, apex straight, coarsely striate-tubercled; late-season achenes uncommon, 2.5–4 mm. 2n = 60.
Phenology: Flowering Jul–Oct.
Habitat: Disturbed places
Elevation: 0-1000
Distribution
Alta., Man., N.B., Nfld. and Labr. (Nfld.), Que., Sask., Calif., Ind., Iowa, Maine, Mass., N.Y., R.I., S.Dak., W.Va., Europe.
Discussion
Selected References
None.