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FOC | Family List | FOC Vol. 16 | Apocynaceae

7. Tabernaemontana Linnaeus, Sp. Pl. 1: 210. 1753.

狗牙花属 gou ya hua shu

Ervatamia (A. de Candolle) Stapf; Pagiantha Markgraf; Rejoua Gaudichaud-Beaupre.

Shrubs or small trees, latex white. Stems repeatedly dichotomously branched. Leaves opposite; adaxial surface of petiole often with a basal semicircular or semiamplexicaul ocrea. Cymes corymbose or umbellate, at branch forks, many or rarely 1-flowered. Calyx divided halfway down or deeper, with few to many basal glands inside. Corolla salverform, widened at or near middle, lobes sharply overlapping to left [or right]. Stamens inserted in widened part of corolla tube; filaments short or almost none; anthers oblong or narrowly triangular, free from pistil head, base sagittate or deeply cordate and not spurred; disc absent. Ovaries 2, free; ovules numerous. Style filiform; pistil head with a subglobose or lampshade-shaped basal part and stigmoid, 2-cleft apical part. Follicles 2, divaricate. Seeds with a red or orange fleshy aril; coma absent.

Ninety-nine species: Africa, Asia, North America, Pacific Islands, South America; five species in China.


1 Corolla double; plants cultivated   4 Tabernaemontana divaricata
+ Corolla single.   (2)
       
2 (1) Corolla lobes pubescent inside all over or only in basal half, ciliate, often pubescent outside   3 Tabernaemontana corymbosa
+ Corolla lobes glabrous inside or pubescent only at extreme base, mostly not ciliate.   (3)
       
3 (2) Corolla tube not twisted; stamens inserted at lower 1/4-1/3 of corolla tube   4 Tabernaemontana divaricata
+ Corolla tube mostly twisted; stamens inserted at middle or upper half of corolla tube.   (4)
       
4 (3) Sepals rounded, obtuse or sometimes acute; corolla tube 8-23 as long as calyx (see also T. bufalina).   (5)
+ Sepals acuminate, awl-shaped or not; corolla tube 4-7 as long as calyx.   (6)
       
5 (4) Corolla tube glabrous inside, twisted 0.25-0.5 turn just below anthers, up to 11 as long as calyx; fruit 1.2-7.1 cm, 2-40-seeded, if smaller and few seeded then with a lateral ridge along each side   5 Tabernaemontana pandacaqui
+ Corolla tube pubescent or pilose inside around anthers, if twisted, 10-23 as long as calyx; fruit 1-1.6 cm, 1-3-seeded, not ridged when mature (see also T. corymbosa)   1 Tabernaemontana bovina
       
6 (4) Corolla of mature bud with a subglobose or broadly ovoid, rounded or obtuse head, glabrous inside; midvein and secondary veins mostly paler than blade on both leaf surfaces   5 Tabernaemontana pandacaqui
+ Corolla of mature bud with an ovoid, acuminate or acute head, hairy or glabrous inside; veins not paler than blade.   (7)
       
7 (6) Peduncle rather robust; bracts scalelike; corolla head of mature bud 6-12 mm   4 Tabernaemontana divaricata
+ Peduncle slender; bracts not scaly; corolla head of mature bud mostly up to 5 mm   2 Tabernaemontana bufalina

Lower Taxa


 

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