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Rheum
Family:
Polygonaceae
Images
not available
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.
Species within checklist:
Blacktail Deer Creek NEON (BLDE) plants - Northern Rockies (D12)
Rheum rhabarbarum
Images
not available
Map not
Available