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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.
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| 1 |
Corolla double; plants cultivated |
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4 Tabernaemontana divaricata |
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Corolla single. |
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(2) |
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| 2 (1) |
Corolla lobes pubescent inside all over or only in basal half, ciliate, often pubescent outside |
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3 Tabernaemontana corymbosa |
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Corolla lobes glabrous inside or pubescent only at extreme base, mostly not ciliate. |
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(3) |
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| 3 (2) |
Corolla tube not twisted; stamens inserted at lower 1/4-1/3 of corolla tube |
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4 Tabernaemontana divaricata |
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Corolla tube mostly twisted; stamens inserted at middle or upper half of corolla tube. |
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(4) |
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| 4 (3) |
Sepals rounded, obtuse or sometimes acute; corolla tube 8-23 as long as calyx (see also T. bufalina). |
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(5) |
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Sepals acuminate, awl-shaped or not; corolla tube 4-7 as long as calyx. |
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(6) |
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| 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 |
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5 Tabernaemontana pandacaqui |
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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) |
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1 Tabernaemontana bovina |
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| 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 |
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5 Tabernaemontana pandacaqui |
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Corolla of mature bud with an ovoid, acuminate or acute head, hairy or glabrous inside; veins not paler than blade. |
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(7) |
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| 7 (6) |
Peduncle rather robust; bracts scalelike; corolla head of mature bud 6-12 mm |
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4 Tabernaemontana divaricata |
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Peduncle slender; bracts not scaly; corolla head of mature bud mostly up to 5 mm |
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2 Tabernaemontana bufalina |
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Lower Taxa
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