Rheum uninerve Maxim.

Species

Angiosperms > Caryophyllales > Polygonaceae > Rheum

Characteristics

Herbs short, 15-30 cm tall. Roots slender. Stem absent. Basal leaves 2-4; petiole short, 3-5 cm, glabrous or rarely papilliferous; leaf blade ovate or narrowly ovate, 8-12 × 4-7.5 cm, papery, glabrous, main vein 1, lateral veins 8-10, base rounded or very broadly cuneate, margin sinuolate, apex obtuse or obtuse-acute. Panicle narrow, from apex of rhizome, 2-5 mm in diam., 1-or 2-branched, glabrous. Pedicel ca. 3 mm, slender, jointed at base. Flowers 2-4-fascicled; bracteole lanceolate, 1-2 mm. Tepals purple-red, elliptic, outer 3 smaller, 1-1.5 mm; disk circular, fleshy. Stamens 8 or 9, shorter than perianth; filaments very short, less than 1 mm. Ovary nearly rhomboid-ovoid; style long, reflexed; stigma inflated. Fruit broadly oblong-ellipsoid, 1.4-1.6 × 1.3-1.5 cm, base cordate, apex obtuse or retuse; wings purple-red, ca. 5 mm wide, membranous, with longitudinal veins near margin. Seeds dark brown, narrowly ovoid, ca. 3 mm wide. Fl. May-Jul, fr. Aug-Sep.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.15 - 0.3
Root system rhizome
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) 5-10

Usage

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

Cultivation

Mode -
Germination duration (days) 21 - 42
Germination temperacture (C°) 15 - 18
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Rheum uninerve world distribution map, present in China and Mongolia

Identifiers

LSID urn:lsid:ipni.org:names:696810-1
WFO ID wfo-0001246360
COL ID 4S6CM
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Rheum uninerve