Fagopyrum tataricum

(Linnaeus) Gaertner
Fruct. Sem. Pl. 2: 182. 1790.
Common names: Tartary or green buckwheat India-wheat sarrasin de Tartarie
Introduced
Basionyms: Polygonum tataricum Linnaeus Sp. Pl. 1: 364. 1753
Treatment appears in FNA Volume 5. Mentioned on page 572.

Stems ascending or erect, yelloish green, sometimes red-tinged, sparingly branched, (10–)30–80(–100) cm. Leaves: ocrea brownish hyaline, loose, funnel-form, 5–11 mm, margins truncate to obtuse, eciliate, glabrous or puberulent proximally; petiole (0.5–)1–7 cm, usually puberulent adaxially; blade palmately veined with 7–9 primary basal veins, broadly triangular to broadly hastate, 2–7 × 2–8 cm, base truncate or cordate to sagittate, margins ciliolate, apex acute to acuminate. Inflorescences axillary, racemelike, 2–10 cm, not crowded at stem apices; peduncle 1–6 cm, puberulent in lines. Pedicels ascending or recurved, 1–3 mm. Flowers often cleistogamous, homostylous; perianths green with whitish margins; tepals triangular to ovate, 1.5–3 mm, margins entire, apex obtuse to acute; stamens ca. 1/2 as long as perianth; styles 0.1–0.4 mm; stigmas purplish. Achenes uniformly gray or, infrequently, mottled with blackish spots medially, bluntly 3-gonous, 5–6 × 3–5 mm, faces irregularly rugose, angles usually obscure in proximal 1/2, more conspicuous in distal 1/2, unwinged, often sinuate-dentate. 2n = 16 (China).


Phenology: Flowering Jun–Sep; fruiting Jul–Nov.
Habitat: Cultivated as grain crop and green manure, waif in waste places, disturbed ground, and field margins, rarely persisting
Elevation: 0-1000

Distribution

V5 1174-distribution-map.gif

Introduced; Alta., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., Que., Sask., Maine, Mass., Mich., N.H., N.Y., Pa., R.I., Vt., W.Va., Asia (China), introduced in Europe.

Discussion

Fagopyrum tataricum is homostylous and self-pollinating. Cultivated plants appear to be most closely related to the wild ones in southwestern Sichuan, China. Tartary buckwheat is a less important crop plant and is encountered less frequently in the flora area than is F. esculentum. It is cultivated in mountainous areas of Asia and elsewhere (C. G. Campbell 1997).

Selected References

None.

Lower Taxa

None.

... more about "Fagopyrum tataricum"
Harold R. Hinds† +  and Craig C. Freeman +
(Linnaeus) Gaertner +
Polygonum tataricum +
Tartary or green buckwheat +, India-wheat +  and sarrasin de Tartarie +
Alta. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, Que. +, Sask. +, Maine +, Mass. +, Mich. +, N.H. +, N.Y. +, Pa. +, R.I. +, Vt. +, W.Va. +, Asia (China) +  and introduced in Europe. +
0-1000 +
Cultivated as grain crop and green manure, waif in waste places, disturbed ground, and field margins, rarely persisting +
Flowering Jun–Sep +  and fruiting Jul–Nov. +
Fruct. Sem. Pl. +
Introduced +
Fagopyrum tataricum +
Fagopyrum +
species +