Polygonum majus Piper

Species

Angiosperms > Caryophyllales > Polygonaceae > Polygonum

Characteristics

Herbs. Stems erect, green, simple or branched, ± wiry, 15-60 cm, usually papillose-scabridulous. Leaves uniformly distributed, articulated to ocreae, basal leaves often caducous, distal leaves abruptly reduced to bracts, articulated to ocreae; ocrea 5-12 mm, glabrous or papillose-scabridulous, proximal part cylindric, distal part lacerate or disintegrating into fibers; petiole 0.1-2 mm; blade 1-veined, not pleated, linear to narrowly oblong or lanceolate, 15-70 × 2-8 mm, margins revolute, papillose-denticulate, apex acute or mucronate. Inflorescences axillary and terminal, spikelike, elongate; cymes spaced along branches, 2-5-flowered. Pedicels exserted from ocreae, reflexed, 0.5-1 mm. Flowers open or semi-open; perianth (3.5-)4-5 mm; tube 9-17% of perianth length; tepals overlapping, uniformly white to pink, petaloid, oblong to oblong-obovate, cucullate, navicular in distal 1/ 4, apex rounded; midveins unbranched or with short lateral branches; stamens 8. Achenes enclosed in perianth, black, elliptic, 3.5-5 mm, faces subequal, shiny or dull, smooth or striate-tubercled.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) -
Root system -
Rooting depth (meter) 0.2
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
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
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Polygonum majus unspecified picture

Distribution

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

Identifiers

LSID urn:lsid:ipni.org:names:206288-2
WFO ID wfo-0001101035
COL ID 4L9M8
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Polygonum douglasii subsp. majus Polygonum majus Polygonum coarctatum var. majus