Polygonum paronychia Cham. & Schltdl.

Beach knotweed (en)

Species

Angiosperms > Caryophyllales > Polygonaceae > Polygonum

Characteristics

Shrubs or subshrubs. Stems prostrate or ascending, brown, branched, rooting at nodes, not wiry, 10-100 cm, glabrous, covered with remains of lacerate, hyaline ocreae. Leaves crowded at branch tips, articulated to ocreae, basal leaves caducous or persistent, distal leaves not reduced in size; ocrea 15-20 mm, glabrous, proximal part cylindric to funnelform, distal part silvery, entire or slightly lacerate, disintegrating into persistent white-gray curly fibers; petiole 0-0.5 mm; blade 1-veined, without pleats, linear to oblanceolate, (5-)10-20(-33) × 3-8 mm, coriaceous, margins revolute, smooth, apex acute or mucronate. Inflorescences axillary; cymes crowded in distal axils, 2-5-flowered. Pedicels enclosed in ocreae, erect to spreading, 2-5 mm. Flowers semi-open or open; perianth (4.5-)6-10 mm; tube 22-48% of perianth length; tepals partially overlapping, uniformly pink or white, reddish brown when dried, petaloid, oblong-ovate to ± lanceolate, apex rounded; midveins pinnately branched; stamens 8. Achenes enclosed in or slightly exserted from perianth, black, ovate, 4-5 mm, faces subequal, shiny, smooth.
Life form perennial
Growth form
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
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Nitrogen fixer -
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Environment

Light -
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Hardiness (USDA) 4-10

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 21 - 60
Germination temperacture (C°) 21 - 23
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Images

Polygonum paronychia unspecified picture

Distribution

Polygonum paronychia world distribution map, present in Canada and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:331038-2
WFO ID wfo-0001101042
COL ID 785VX
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Polygonum paronychia