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Rheum
Rheum
Family:
Polygonaceae
Paul Rothrock
FNA
Resources
Craig C. Freeman in Flora of North America (vol. 5)
Herbs,
perennial; roots fleshy.
Stems
erect, glabrous or pubescent.
Leaves
deciduous, mostly basal, alternate, petiolate; ocrea persistent or deciduous, chartaceous; blade cordate-ovate to orbiculate or reniform, margins entire, undulate.
Inflorescences
terminal, paniclelike, pedunculate.
Pedicels
present.
Flowers
bisexual, 1-10 per ocreate fascicle, base stipelike; perianth nonaccrescent in fruit, whitish green or pinkish green, campanulate, glabrous; tepals 6, distinct, sepaloid, dimorphic, outer 3 narrower than inner 3; stamens (6-)9; filaments distinct, free, glabrous; anthers yellow or pinkish, elliptic; styles 3, erect or deflexed, distinct; stigmas capitate.
Achenes
exserted, dark brown, winged, 3-gonous, glabrous.
Seeds:
embryo straight or curved.
x
= 11.
Show all taxa
Rheum australe
Rheum compactum
Rheum fedtschenkoi
Images
not available
Rheum maximowiczii
Images
not available
Rheum moorcroftianum
Rheum officinale
Images
not available
Rheum palmatum
Rheum rhabarbarum
Rheum rhaponticum
Rheum rhomboideum
Rheum ribes
Images
not available
Rheum spiciforme
Rheum tanguticum
Images
not available
Rheum tataricum
Images
not available
Rheum undulatum
Rheum webbianum
Rheum wittrockii
Images
not available
Rheum × hybridum