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FOC | Family List | FOC Vol. 10 | Fabaceae

108. Glycine Willdenow, Sp. Pl. 3: 854, 1053. 1802.

大豆属 da dou shu

Authors: Ren Sa & Michael G. Gilbert

Leptocyamus Bentham; Leptolobium Bentham (Jun 1837), not Vogel (Apr-May 1837); Soja Moench.

Annual or perennial herbs, twining, climbing, creeping or erect. Roots herbaceous or almost woody, usually with nodules. Leaves pinnately 3(-7)-foliolate; stipules small, free, usually deciduous. Inflorescence axillary, racemose; flowers solitary or clustered at nodes. Bracts small, at peduncle base; bracteoles paired, at calyx base. Calyx membranous, campanulate, hairy, deeply 2-lipped; upper 2 lobes connate, lower 3 lanceolate to setiform. Corolla usually purple, light purple, or white, slightly longer than calyx, glabrous; petals long clawed; standard large, subcircular or obovate, with inconspicuous auricles; wings narrow, slightly connate with keels; keels shorter than wings, obtuse, apex untwisted. Stamens diadelphous; vexillary stamen partly joined to others; anthers uniform. Ovary subsessile; ovules many; style ± filiform, slightly inflexed, glabrous or shortly pubescent; stigma terminal, capitate. Legume stipitate, linear or oblong, straight or curved, dehiscent, valves coiling after dehiscent, compressed or slightly inflated, septate between seeds. Seeds 1-5, ovoid-oblong, almost oblate-tetragonal, oblate, or orbicular.

About nine species: tropics, subtropics, and temperate region of E Hemisphere; six species (two endemic, one introduced) in China.

1 Raceme longer than leaves, 4-8 cm   (2)
+ Raceme shorter than leaves, usually 1-3 cm   (3)
2 (1) Leaflets elliptic to ovate, tomentose; stems twining or climbing.   5 G. tomentella
+ Leaflets lanceolate to linear, sparsely strigose; stems procumbent.   4 G. tabacina
3 (1) Perennial herbs; root almost woody.   6 G. dolichocarpa
+ Annual herbs; root leathery   (4)
4 (3) Stem erect; cultivated.   1 G. max
+ Stem twining or creeping; wild   (5)
5 (4) Stem slender, twining; legume 17-23 × 4-5 mm; seed 2.5-4 × 1.8-2.5 mm.   2 G. soja
+ Stem robust, twining or creeping; legume 30-60 × 5-7 mm; seed 5-6 × 4-4.5 mm.   3 G. gracilis

Lower Taxa


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