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FOC | Family List | FOC Vol. 16 | Apocynaceae

24. Chonemorpha G. Don, Gen. Hist. 4: 76. 1837.
[nom. cons.]

鹿角藤属 lu jiao teng shu

Rhynchodia Bentham.

Lianas stout, woody, with latex. Leaves large, opposite; interpetiolar lines and colleters present. Cymes lax, paniculate or racemose, terminal or subaxillary. Flowers large. Calyx tubular, shortly 5-toothed or 5-partite, basal glands large, denticulate. Corolla white or reddish, funnelform, tube cylindric, throat not scaly; lobes overlapping to right. Stamens inserted near base or middle of corolla tube; anthers sagittate, connivent, adherent to pistil head, cells spurred at base; disc ringlike, fleshy, shorter than ovary, apex 5-cleft. Ovaries 2, free; ovules numerous in each ovary. Style filiform; pistil head club-shaped, slightly thickened, apex 2-cleft. Follicles 2, elongated, cylindric. Seeds ovate-oblong, flat, short beaked, beak with a long coma.

About 15 species: tropical and subtropical Asia, eight species in China.

1 Calyx less than 7 mm; corolla tube less than 1 cm   8 Chonemorpha verrucosa
+ Calyx more than 7 mm; corolla tube more than 2 cm.   (2)
2 (1) Calyx divided to middle or near base   7 Chonemorpha griffithii
+ Calyx shortly 5-toothed.   (3)
3 (2) Corolla pink or reddish; style glabrous.   (4)
+ Corolla white; style often hairy.   (5)
4 (3) Calyx 1.5-1.8 cm; cymes to 35 cm; follicles to 25 cm   2 Chonemorpha splendens
+ Calyx 1.8-3 cm; cymes to 17 cm; follicles to 34 cm   3 Chonemorpha megacalyx
5 (3) Base of leaf blade cordate; calyx glabrescent outside; corolla limb up to 8 cm in diam.   1 Chonemorpha fragrans
+ Base of leaf blade rounded or cuneate; calyx pubescent to tomentose outside; corolla limb up to 5 cm in diam.   (6)
6 (5) Corolla pubescent throughout; disc longer than ovary; seed coma ca. 7 cm   4 Chonemorpha eriostylis
+ Corolla glabrous throughout; disc shorter than ovary; seed coma 4-5 cm.   (7)
7 (6) Leaves thick leathery, obovate, densely floccose; calyx ca. 1 cm; corolla tube ca. 2 cm, lobes ca. 1.7 cm   5 Chonemorpha floccosa
+ Leaves membranous, elliptic, densely hirsute; calyx ca. 1.5 cm; corolla tube ca. 2.8 cm, lobes ca. 2.5 cm   6 Chonemorpha parviflora

Lower Taxa


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