Polygonum californicum Meisn.

California knotweed (en)

Species

Angiosperms > Caryophyllales > Polygonaceae > Polygonum

Characteristics

Herbs. Stems erect, green, simple or divaricately branched, ± wiry, 4-40 cm, papillose-scabridulous. Leaves uniformly distributed, not articulated to ocreae, basal leaves usually caducous, distal leaves abruptly reduced to bracts; ocrea 5-10 mm, glabrous or papillose-scabridulous, proximal part cylindric, distal part white or tawny, disintegrating into ± bristly-fringed fibers; petiole absent; blade 3-veined, without pleats, linear, 5-25(-30) × 0.5-2 mm, margins revolute, papillose-denticulate or smooth, apex mucronate or weakly spine-tipped. Inflorescences axillary; cymes in distal axils, 1-flowered. Pedicels absent. Flowers open or closed; perianth 2.5-3.5 mm; tube 10-20% of perianth length; tepals overlapping, uniformly white to pink, petaloid, elliptic, navicular, apex acute to acuminate; midveins unbranched; stamens 8. Achenes enclosed in or slightly exserted from perianth, brown, narrowly elliptic, 1.8-2.2 mm, faces subequal, shiny, smooth.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
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Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
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Hardiness (USDA) 5-10

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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Distribution

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

Identifiers

LSID urn:lsid:ipni.org:names:695513-1
WFO ID wfo-0001101024
COL ID 4L96W
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Polygonum californicum Polygonum greenei