Overview

Distribution

Localities documented in Tropicos sources

Polygonum oxyspermum C.A. Mey. & Bunge ex Ledeb.:
Canada (North America)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO 63110 USA

Source: Missouri Botanical Garden

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Physical Description

Morphology

Description

Plants green to blue-green, homophyllous. Stems prostrate to ascending, branched at proximal and middle nodes, not wiry, 20-100 cm. Leaves: ocrea 6.5-12 mm, proximal part cylindric, pruinose, distal part hyaline, soon disintegrating into brown fibers or nearly completely deciduous; petiole 0-1 mm; blade green to bluish green, elliptic-lanceolate to linear, 10-35 × 1.5-15 mm, margins flat or narrowly revolute, apex acute; middle stem leaves slightly larger than adjacent branch leaves, distal leaves overtopping flowers. Inflorescences axillary, cymes uniformly distributed, 2-7-flowered. Pedicels exserted from ocreae, 2.5-5(-7) mm. Flowers semi-open; perianth 3.5-5.5 mm; tube 28-39% of perianth length; tepals slightly overlapping, green, margins white to pink, petaloid, not keeled, oblong to obovate, not cucullate; veins branched; stamens 8. Achenes exserted from perianth, pale brown to dark brown, ovate, 3-gonous, (3.5-)4.1-5.5(-6.5) mm, faces subequal, apex not beaked, edges straight, shiny, smooth or with fine tubercles especially toward apex; late-season achenes unknown.
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© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Polygonum oxyspermum

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Statistics of barcoding coverage: Polygonum oxyspermum

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 4
Specimens with Barcodes: 9
Species With Barcodes: 1
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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Notes

Comments

The treatment by D. A. Webb and A. O. Chater (1963) of the Polygonum oxyspermum complex is followed here. T. Karlsson (2000) accepted P. raii and P. oxyspermum as distinct species.
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Source: Missouri Botanical Garden

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