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FOC | Family List | FOC Vol. 10 | Fabaceae

94. Cajanus Adanson, Fam. Pl. 2: 326, 529. 1763.

木豆属 mu dou shu

Authors: Ren Sa & Michael G. Gilbert

Erect shrubs, subshrubs, or woody or herbaceous vines. Leaves pinnately or sometimes digitately 3-foliolate; stipules and stipels small or absent; leaflets usually with sessile glands abaxially. Inflorescence axillary or terminal, racemose. Bracts deciduous; bracte­oles absent. Calyx campanulate, 5-lobed; lobes short, upper 2 connate or slightly lobed at apex. Standard almost circular, obovate or obovate-elliptic, base clawed, with inflexed auricles; wings narrowly to broadly elliptic, auriculate; keels obliquely circular, apex ob­tuse. Stamens diadelphous; vexillary stamen free; anthers uniform. Ovary almost sessile; ovules 2-6; styles long, linear, apex curved, upper part glabrous or slightly hairy; stigma terminal, small, capitate. Legume linear-oblong, dehiscent, compressed. Seeds 2-10, reniform to almost orbicular, colorful or blotched; strophiole obvious or absent.

About 30 species: tropical Asia, Madagascar, Oceania; seven species in China.

See Maesen, Wageningen Agric. Univ. Pap. 85(4): 1-225. 1985.

1 Erect shrubs or subshrubs   (2)
+ Climbing or twining vines   (3)
2 (1) Leaflets lanceolate to elliptic, 2.8-10 cm, apex acute or acuminate; mature seed without strophiole.   1 C. cajan
+ Leaflets obovate, 2.5-3.8 cm, apex rounded or acute; mature seed with conspicuous strophiole.   2 C. niveus
3 (1) Legume 1.5-2.5 cm.   7 C. scarabaeoides
+ Legume more than 3 cm   (4)
4 (3) Flowers 2.5-3 cm; calyx with bulbous-based hairs.   6 C. grandiflorus
+ Flowers 1.5-2.8 cm; calyx without bulbous-based hairs   (5)
5 (4) Terminal leaflet ovate to ovate-elliptic; calyx densely yellow hirsute.   3 C. goensis
+ Terminal leaflet rhomboid-ovate, rhomboid, or obovate-rhomboid; calyx pubescent or glandular hairy   (6)
6 (5) Leaflets leathery, terminal leaflet broader than long; legume 4-6-seeded.   4 C. volubilis
+ Leaflets papery or thickly papery, terminal leaflet longer than broad; legume 8-10-seeded.   5 C. mollis

Lower Taxa


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