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3. Polygonum sect. Bistorta (Linnaeus) D. Don, Prodr. Fl. Nepal. 69. 1825.
拳参组 quan shen zu
Description from Flora of China
Polygonum [unranked] Bistorta Linnaeus, Sp. Pl. 1: 360. 1753; Bistorta (Linnaeus) Miller.
Plants without prickles. Leaves lanceolate to ovate or elliptical, margin revolute. Inflorescence a solitary terminal spike. Tepals free or only slightly fused at base. Inner nectaries confluent with inner filament bases. Styles 3, free, entire.
Synonymy updated after publication of Flora volume.
About 50 species: centered in the Arctic and E Asia; 22 species (six endemic) in China.
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