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FOC | Family List | FOC Vol. 16 | Apocynaceae

30. Beaumontia Wallich, Tent. Fl. Napal. 14. 1824.

清明花属 qing ming hua shu

Lianas woody, robust, with latex. Leaves opposite, usually with petiolar glands. Inflorescences terminal or axillary cymes; bracteoles leafy, large. Flowers large, fragrant. Sepals free, bearing many basal glands inside; lobes leafy, large. Corolla white, funnelform, tube short or long, limb widely campanulate, throat not scaly, lobes overlapping to right. Stamens inserted at distal narrow portion of corolla tube; filaments arcuate, long, thickened distally; anthers sagittate, usually exserted, connivent, adherent to pistil head, cells spurred at base; disc ringlike, shallowly 5-lobed. Ovaries 2, connate, surrounded by disc; ovules numerous in each locule. Style long; pistil head fusiform. Follicles elongated, thick, hard. Seeds compressed, apex attenuate, coma silky; cotyledons leaflike or thick, radicle short.

Nine species: E and SE Asia, five species in China.

1 Leaves densely pubescent abaxially; corolla tube 1-2.7 cm, lobes rounded at apex   1 Beaumontia khasiana
+ Leaves pubescent abaxially when young, glabrous or glabrescent when older; corolla tube 4-13 cm, lobes acute or short acuminate at apex.   (2)
2 (1) Corolla tube puberulent inside.   (3)
+ Corolla tube glabrous inside.   (4)
3 (2) Sepals broadly elliptic or obovate, 3.5-5.3 2-3.3 cm; corolla ca. 12 cm in diam.   2 Beaumontia brevituba
+ Sepals narrowly elliptic, 1.5-2.5 0.3-0.6 cm; corolla ca. 5 cm in diam.   3 Beaumontia pitardii
4 (2) Corolla funnelform, limb attenuate at base; stamens white, filaments 3.2-6 cm   4 Beaumontia grandiflora
+ Corolla broadly campanulate, limb abruptly constricted at base; stamens yellow or orange, filaments 1.5-2.5 cm   5 Beaumontia murtonii

Lower Taxa


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