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3. Fallopia Adanson, Fam. Pl. 2: 277, 557. 1763.

首乌属 shou wu shu

Description from Flora of China

Bilderdykia Dumortier; Pleuropterus Turczaninow.

Herbs annual, rarely subshrubs. Stems twining. Leaves simple, alternate, petiolate; leaf blade ovate or cordate, margin entire; ocrea tubular, apex oblique or truncate. Inflorescence racemose or paniculate. Flowers bisexual. Perianth persistent, 5-parted; outer 3 tepals larger, keeled or winged, rarely without keels or wings. Stamens 8. Styles very short; stigmas capitate. Achenes trigonous, ovoid.

Between seven and nine species (but ca. 20 if taken more broadly to include Reynoutria): widespread in N temperate zone; eight species (three endemic) in China.

(Authors: Li Anjen (李安仁 Li An-ren); Chong-wook Park)


 

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