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2. Trientalis Linnaeus, Sp. Pl. 1: 344. 1753.
七瓣莲属 qi ban lian shu
Herbs perennial, glabrous, with horizontal rhizomes. Stems erect. Lower leaves alternate, much smaller or scalelike. Upper leaves in a terminal whorl. Flowers solitary, axillary, pedicellate, (5--)7(--9)-merous, without bracts. Calyx parted nearly to base, persistent. Corolla white, rotate, deeply parted; lobes contorted in bud. Filaments connate basally into a hyaline ring; anthers basifixed, linear, apex obtuse. Ovary globose; style filiform. Capsule globose, dehiscing by 5(--7) valves. Seeds few, reticulate.
Two species distributed in Europe, Asia and NW North America; one species occurs in China.
Lower Taxon
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