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FOC | Family List | FOC Vol. 10 | Fabaceae

96. Erythrina Linnaeus, Sp. Pl. 2: 706. 1753.

刺桐属 ci tong shu

Authors: Ren Sa & Michael G. Gilbert

Trees or shrubs [or perennial herbs], branches with prickles. Leaves pinnately 3-foliolate; stipules small; stipels fleshy and glandular; leaflets sometimes with stellate hairs. Inflorescence axillary or terminal, racemelike, noded, 2- or more flowered. Flowers conspicuous; bracts and bracteoles mostly deciduous. Calyx spathaceous, campanulate, or turbinate, truncate or 2-lobed. Corolla often red or orange, usually longer than calyx; petals extremely unequal; standard large, rounded or oblong, often folded longitudi­nally, erect or spreading, subsessile or long clawed, without appendages; wings short, sometimes absent; keels much shorter than standard. Stamens diadelphous; vexillary stamen free; anthers uniform. Ovary stipitate; ovules 2 to many; style inflexed; stigma small, terminal. Legume stipitate, mostly linear-oblong, often curved, dehiscent along ventral suture, rarely indehiscent, mostly leath­ery or woody, often constricted between seeds, not septate. Seeds 1-14, white, gray, or brown, rarely red with dark spots, ovoid; hilum lateral, oblong, without strophiole.

More than 100 species: tropics and subtropics; four species in China.

Erythrina corallodendron Linnaeus and E. crista-galli Linnaeus, and to a lesser extent E. caffra Thunberg, E. humeana Sprengel, E. lysistemon Hutchinson, and E. specicosa Andrews, have been introduced into China as ornamentals.

1 Calyx spathaceous, splitting on one side   (2)
+ Calyx campanulate or turbinate, lobes truncate or 2-lobed   (3)
2 (1) Keels and wings subequal; stem prickles minute, usually black.   3 E. variegata
+ Keels much longer than wings; stem prickles whitish.   4 E. stricta
3 (1) Keels subequal to wings; legume with seeds only toward apex.   2 E. subumbrans
+ Keels longer than wings; legume with seeds uniformly distributed along length   (4)
4 (3) Leaflets 8-20(-25) cm; terminal leaflet usually reniform.   1 E. arborescens
+ Leaflets 5-15 cm; terminal leaflet not reniform   (5)
5 (5) Leaflets rhomboid-ovate; seed red with black spots.  

E. corallodendron

+ Leaflets ovate or lanceolate-elliptic; seed gray or bright brown.  

E. crista-galli

Lower Taxa


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