Difference between revisions of "Polygonum patulum"
Fl. Taur.-Caucas. 1: 304. 1808.
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| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=I | ||
| + | |label=Introduced | ||
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|basionyms= | |basionyms= | ||
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|elevation=0-800 m | |elevation=0-800 m | ||
|distribution=Ala.;Ill.;Wash.;Eurasia;n Africa. | |distribution=Ala.;Ill.;Wash.;Eurasia;n Africa. | ||
| + | |introduced=true | ||
|discussion=<p>The name <i>Polygonum patulum</i> has been misapplied to a distinctive form of <i>P. ramosissimum</i> in saline marshes in California (M. Costea and F. J. Tardif 2003b).</p> | |discussion=<p>The name <i>Polygonum patulum</i> has been misapplied to a distinctive form of <i>P. ramosissimum</i> in saline marshes in California (M. Costea and F. J. Tardif 2003b).</p> | ||
|tables= | |tables= | ||
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|publication title=Fl. Taur.-Caucas. | |publication title=Fl. Taur.-Caucas. | ||
|publication year=1808 | |publication year=1808 | ||
| − | |special status= | + | |special status=Introduced |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V5/V5_1143.xml |
|subfamily=Polygonaceae subfam. Polygonoideae | |subfamily=Polygonaceae subfam. Polygonoideae | ||
|genus=Polygonum | |genus=Polygonum | ||
Latest revision as of 22:08, 5 November 2020
Plants green or bluish green, heterophyllous. Stems mostly ascending or erect, branched from base, not wiry, 20–80 cm. Leaves: ocrea 7–9 mm, proximal part cylindic, distal part disintegrating into straight fibers; petiole 0.2–1 mm; blade green or bluish green, linear to lanceolate, 25–40 × 4–8 mm, margins flat, apex acute; stem leaves 2–4 times as long as branch leaves; distal leaves abruptly reduced and not overtopping flowers (shorter than or equaling flowers). Inflorescences axillary and terminal, spikelike; cymes aggregated at tips of stems and branches, 1–3-flowered. Pedicels enclosed in ocreae, 1.5–2 mm. Flowers closed or semi-open; perianth 2.2–3 mm; tube 15–30% of perianth length; tepals overlapping, green with white to pink margins, petaloid, not keeled, oblong, cucullate; veins branched; stamens 8. Achenes slightly exserted from perianth, light brown to dark brown, ovate, 3-gonous, 2–2.3(–2.8) mm, faces subequal, concave, apex not beaked, edges concave, dull, striate-tubercled; late-season achenes uncommon, 2.5–4 mm.
Phenology: Flowering Jul–Oct.
Habitat: Waste places
Elevation: 0-800 m
Distribution
Introduced; Ala., Ill., Wash., Eurasia, n Africa.
Discussion
The name Polygonum patulum has been misapplied to a distinctive form of P. ramosissimum in saline marshes in California (M. Costea and F. J. Tardif 2003b).
Selected References
None.