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Rhodiola
Family: Crassulaceae
Rhodiola image
Max Licher
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Reid V. Moran in Flora of North America (vol. 8)
Herbs, perennial (dying back in winter to rootstock), not viviparous, 0.3-6 dm, glabrous [pubescent]. Stems a rootstock with apex mostly above ground, erect, spreading, or decumbent, commonly branching to form clumps, fleshy, with brown scalelike [or green] leaves; flowering stems from axils of brown scale-leaves on stout rootstock partly above ground. Leaves persistent, cauline, alternate, sessile, subclasping basally; blade elliptic to ovate or oblanceolate to linear, obovate, or oblong, laminar (mostly to 1 mm thick), 0.5-5.5 cm, somewhat fleshy, base not spurred, margins entire or toothed; veins not conspicuous. Inflorescences cymose or spikelike to subcapitate. Flowers bisexual or unisexual, erect, 4-6-merous; sepals connate basally, all alike (unequal in R. rosea); petals erect or spreading, distinct, greenish, white, rose, dark red, or yellowish; calyx and corolla not circumscissile in fruit; nectaries quadrate to linear; stamens 2 times as many as sepals, epipetalous; filaments mostly adnate to corolla at base; pistils erect, nearly distinct; ovary base straight; styles 2+ times shorter than ovary. Fruits erect. Seeds oblanceoloid or pyriform, ribbed, finely cross-ribbed. In Rhodiola, inflorescences are borne in axils of scale leaves on the rootstocks, which are partly above ground. They are thinner and leafier than those of Hylotelephium. This treatment largely follows R. T. Clausen (1975), except that he made Rhodiola a subgenus of Sedum.

JANAS 27(2)
PLANT: Perennial herbs, ours glabrous, with rootstocks bearing axillary annual floral stems. LEAVES: alternate, subclasping, often toothed, broad and rather thin, those of rootstocks scale-like in ours. FLORAL STEMS: lateral, overtopping rootstocks, bearing the foliage leaves; inflorescence cymose or in ours spikelike or subcapitate. FLOWERS: perfect or imperfect, 4-6-merous, in ours perfect- mostly 5-6-merous; petals separate, in ours nearly erect; stamens twice as many as sepals; pistils erect, separate. FOLLICLES: erect, many-seeded. NOTES: Ca. 40 spp. in N Hemisphere, mostly montane and subarctic, mostly c Asia (Greek rhodon = rose, from odor of rootstock in type species). REFERENCES: Moran, Reid. 1994. Bixaceae. J. Ariz. - Nev. Acad. Sci. Volume 27, 190-194.
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Rhodiola alaskana
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Rhodiola algida
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Rhodiola alsia
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Rhodiola bupleuroides
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Rhodiola gelida
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Rhodiola integrifolia
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Rhodiola kirilowii
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Rhodiola linearifolia
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Rhodiola macrocarpa
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Rhodiola neomexicana
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Rhodiola nobilis
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Rhodiola polygama
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Rhodiola quadrifida
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Rhodiola rhodantha
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Rhodiola roanensis
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Rhodiola rosea
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Rhodiola semenovii
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Rhodiola wallichiana
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Rhodiola yunnanensis
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The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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