Polygonum biconvexum Hayata

Species

Angiosperms > Caryophyllales > Polygonaceae > Polygonum

Characteristics

Herbs annual. Stems ascending, prostrate at base, 30-80 cm tall, branched, retrorse prickly along angles. Petiole 2-4 cm, often narrowly winged, retrorsely prickly; leaf blade hastate, both surfaces bristly, sparsely shortly stellate hairy, base nearly truncate to cordate, margin ciliate; middle lobe broadly elliptic or ovate, usually contracted near base, margin ciliate, apex acuminate; basal lobes ovate, small, apex acute to obtuse; ocrea tubular, 5-10 mm, apex truncate, sometimes apex with herbaceous wing, ciliate. Inflorescence terminal or axillary, capitate; peduncle glandular hairy; bracts lanceolate, 3.5-4 mm, apex acuminate, ciliate, each 2-flowered. Pedicels shorter than bracts, 2-3 mm. Perianth pinkish, 4-parted; tepals elliptic, 2.5-3.5 mm, apex obtuse. Stamens 5 or 6, in 2 whorls. Styles 2, connate to below middle; stigmas 2, capitate. Achenes included in persistent perianth, brown, opaque, broadly ovoid, biconvex, ca. 3 mm. Fl. Jul-Aug, fr. Sep-Oct.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.3 - 0.8
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) -

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 -

Distribution

Polygonum biconvexum world distribution map, present in China

Identifiers

LSID urn:lsid:ipni.org:names:695457-1
WFO ID wfo-0001220810
COL ID 4L95K
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Polygonum thunbergii f. bicovexum Polygonum biconvexum Persicaria biconvexa Truellum biconvexum Polygonum hastatotrilobum var. lenticulare