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FOC | Family List | FOC Vol. 5 | Polygonaceae

6. Fagopyrum Miller, Gard. Dict. Abr., ed. 4. [495]. 1754.
[nom. cons.]

荞麦属 qiao mai shu

Li Anjen (李安仁 Li An-ren); Suk-pyo Hong

Herbs annual or perennial, rarely subshrubs, monoecious. Stems erect, glabrous or pubescent. Leaves simple, alternate, petiolate; leaf blade triangular, cordate, broadly ovate, sagittate, or linear; ocrea membranous, oblique, margin entire, apex acute or truncate. Inflorescence racemose or corymbose. Flowers bisexual. Perianth persistent, 5-parted; tepals 5, not accrescent. Stamens 8. Styles 3, elongate; stigmas capitate. Achenes trigonous, not winged or horned at base.

About 15 species: Asia, Europe; ten species (six endemic) in China.

1 Subshrub or perennial herb.   (2)
+ Annual herb.   (4)
2 (1) Subshrub; leaves sagittate or ovate-triangular, apex long acuminate or caudate.   1 F. urophyllum
+ Perennial herb; leaves broadly ovate or triangular, apex acuminate or acute.   (3)
3 (2) Stems and branches leafless above; leaves broadly ovate or triangular, 2-3 cm, ocrea apically acute; pedicel articulate at apex; achenes ovoid, 2-2.5 mm.   2 F. statice
+ Stems and branches leafy above; leaves triangular, 4-12 cm; ocrea apically truncate; pedicel articulate at middle; achenes broadly ovoid, 6-8 mm.   3 F. dibotrys
4 (1) Achenes grooved; angles rounded below middle, sharply acute above; pedicel articulate at middle.   4 F. tataricum
+ Achenes not grooved; angles sharply acute; pedicel apically articulate or not articulate.   (5)
5 (4) Leaves cordate; inflorescence capitate.   5 F. gilesii
+ Leaves not cordate; inflorescence racemose, corymbose, or filiform, terminal spikelike panicle.   (6)
6 (5) Stems, branches leafless above.   6 F. leptopodum
+ Stems, branches leafy above.   (7)
7 (6) Leaves triangular or ovate triangular, 1.5-5 cm wide; inflorescence racemose or corymbose.   (8)
+ Leaves linear, triangular-sagittate, or narrowly sagittate, 0.2-1 cm wide; inflorescence a dense or lax filiform terminal spikelike panicle.   (9)
8 (7) Inflorescence lax, interrupted; pedicel articulate at apex; achenes ca. 3 mm; plants wild.   7 F. gracilipes
+ Inflorescence dense, not interrupted; pedicel not articulate; achenes 5-6 mm; plants cultivated.   8 F. esculentum
9 (7) Leaves linear.   9 F. lineare
+ Leaves triangular-sagittate or narrowly sagittate.   10 F. caudatum

  • List of lower taxa


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