Polygonum marinense T.R.Mert. & P.H.Raven

Marin knotweed (en)

Species

Angiosperms > Caryophyllales > Polygonaceae > Polygonum

Characteristics

Plants often reddish tinged, heterophyllous, subsucculent. Stems prostrate to ascending, branching from base, not wiry, 15-40 cm. Leaves: ocrea 4-6 mm, proximal part funnelform, distal part silvery hyaline, soon disintegrating, leaving almost no fibrous remains; petiole 2-5 mm; blade often reddish tinged, elliptic to obovate or oblanceolate; 20-35 × 9-16 mm, margins flat, apex rounded; stem leaves (1.3-)2-2.6(-3.5) times as long as branch leaves; distal leaves overtopping flowers in distal part of inflorescence. Inflorescences axillary; cymes in most leaf axils, 1-4-flowered. Pedicels mostly exserted from ocreae, 2-4 mm. Flowers semi-open; perianth 3-3.5(-4) mm; tube 18-25% of perianth length; tepals overlapping, green, margins white or pink, petaloid, not keeled, broadly rounded, cucullate; midveins unbranched; stamens 8. Achenes exserted from perianth, brown, ovate, 3-gonous, 2.8-3.4(-4) mm, faces subequal or evidently unequal, apex not beaked, edges straight, shiny, minutely roughened; late-season achenes uncommon, 4.5-5 mm. 2n = 60.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
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Environment

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Usage

Uses -
Edible -
Therapeutic use -
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Cultivation

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

Polygonum marinense world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:206289-2
WFO ID wfo-0001101036
COL ID 4L9MF
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Polygonum marinense