Rheum przewalskyi Losinsk.

Species

Angiosperms > Caryophyllales > Polygonaceae > Rheum

Characteristics

Herbs short, stout. Stem absent. Ocreae usually at tip of rhizome, brown, membranous or papery, glabrous. Basal leaves 2-4; petiole purple-red, subterete, 4-10 cm, stout, glabrous or muricate; leaf blade purple-red abaxially, yellow-green adaxially, broadly ovate or rhombic-ovate, 10-20 × 9-17 cm, leathery, abaxially glabrous or papilliferous, adaxially glabrous, basal veins 5-7, base subcordate, margin entire, rarely slightly sinuolate, apex obtuse. Panicles 2 or 3, spiciform; rachis from tip of rhizome, subequal to leaves, 2-4-branched, 5-7 mm in diam. at base, glabrous or sparsely papilliferous. Pedicel ca. 2 mm, jointed below middle. Tepals not spreading, yellow-white, broadly ovate or ovate, outer 3 smaller, ca. 1.2 mm. Stamens subequal to perianth, slightly longer than perianth; filaments connected to disk. Ovary broadly ellipsoid; style reflexed, long; stigma inflated to disk. Fruit broadly ovoid or ovoid, 8.5-10 × 7-8.5 mm, base subcordate, apex obtuse, rarely retuse or slightly raised; wings ca. 3 mm wide, with longitudinal veins near middle. Seeds dark brown, ovoid, ca. 3 mm wide. Fl. Jul, fr. Aug.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) -
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) 6-10

Usage

Uses -
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 przewalskyi world distribution map, present in China

Identifiers

LSID urn:lsid:ipni.org:names:696779-1
WFO ID wfo-0001246366
COL ID 4S6BR
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Rheum przewalskyi