Rheum pumilum Maxim.

Species

Angiosperms > Caryophyllales > Polygonaceae > Rheum

Characteristics

Herbs short, 10-25 cm tall. Stem erect, finely striped, slender, pilose. Basal leaves 2 or 3; petiole subterete, ca. as long as blade or slightly longer, hairy; leaf blades ovate-elliptic, 1.5-5 × 1-3 cm, subleathery, abaxially pilose, adaxially glabrous, rarely pilose at base of midvein, basal veins 3-5, middle one stout, base cordate, margin entire, apex obtuse. Stem leaves 1 or 2, nearly lanceolate, small; ocrea short, ca. 5 mm, membranous when dry, glabrous, not clasping. Panicle narrow, sparsely branched, pilose. Pedicel 2-3 mm, slender, jointed at base. Flowers 2-or 3-fascicled. Tepals not spreading, with purple-red margin, elliptic or broadly elliptic, 1.5-2 mm. Stamens 9 or fewer, shorter than perianth. Ovary broadly ellipsoid; stigma nearly inflated. Fruit triangular or triangular-ovoid, 5-6 mm; wings narrow, 1-1.5 mm wide, with longitudinal vein at middle. Seeds ovoid, 2-2.5 mm wide. Fl. Jun-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) 0.1 - 0.25
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) 6-10

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 pumilum world distribution map, present in China

Identifiers

LSID urn:lsid:ipni.org:names:696780-1
WFO ID wfo-0001246356
COL ID 4S6BS
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Rheum pumilum