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Pteroxygonum Damm. et Diels


Description from Flora of China

Herbs perennial. Stems climbing, simple. Leaves simple, alternate, petiolate, triangular or triangular-ovate; ocrea membranous, oblique, margin entire, apex acute. Inflorescence racemose. Flowers bisexual. Perianth persistent, 5-parted, not accrescent. Stamens usually 8. Ovary ovoid; styles 3, persistent; stigmas capitate. Achenes trigonous, ovoid, winged along angles, horned at base.

Treatments by Haraldson (Symb. Bot. Upsal. 22(2): 1–95. 1978) and Ronse Decraene & Akeroyd (Bot. J. Linn. Soc. 98: 321–371. 1988) did not consider the winged achene sufficient justification for generic status and included the single species within Fagopyrum.

* One species.

(Authors: Li Anjen (李安仁 Li An-ren); Alisa E. Grabovskaya-Borodina)


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