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FOC | Family List | FOC Vol. 16 | Apocynaceae

13. Rauvolfia Linnaeus, Sp. Pl. 1: 208. 1753.

萝芙木属 luo fu mu shu

Trees or shrubs with latex. Leaves whorled, rarely opposite, with glands axillary and sometimes on petiole. Cymes pedunculate, terminal or axillary, each branch ends in as many inflorescences and/or branches as leaves in a whorl. Calyx deeply divided, without glands. Corolla white, yellow, green, or pink, rarely with a red tube, salverform or campanulate; tube cylindric, swollen on 1 side at or above middle, villous inside distal half, throat not scaly, often with long hairs inside; lobes overlapping to left. Stamens inserted in widening of corolla tube; filaments very short; anthers ovate, free from pistil head, base rounded; disc ringlike or cup-shaped, entire or lobed at apex. Ovaries 2, free or connate. Style filiform; pistil head drum-shaped, with a pendulous ring, apex shortly 2-cleft. Drupes 2, distinct or connate. Seed 1, without coma.

About 60 species: Africa, Asia, America; seven species in China.


1 Trees; lateral veins 30-45 pairs, subparallel, nearly at right angles to midvein   1 Rauvolfia sumatrana
+ Shrubs; lateral veins 5-20 pairs, arcuate ascending.   (2)
       
2 (1) Ovaries and fruit of connate carpels, often only at base.   (3)
+ Ovaries and fruit of free carpels.   (5)
       
3 (2) Leaves ovate or elliptic, tomentose when young; corolla tube 2-3 mm; fruit entire at apex   2 Rauvolfia tetraphylla
+ Leaves narrowly elliptic or obovate, glabrous; corolla tube 10-20 mm; fruit forked at apex.   (4)
       
4 (3) Leaves usually narrowly elliptic, 7-20 cm, membranous; petiole 10-15 mm; inflorescences solitary; peduncle, pedicel, calyx, and corolla red or reddish; corolla lobes 1.5-3.5 mm; stamens inserted at middle of corolla tube   3 Rauvolfia serpentina
+ Leaves obovate, 1-6 cm, leathery; petiole 2-4 mm; peduncle, pedicel, and calyx green; corolla tube white, lobes 10-14 mm; stamens inserted at corolla throat   4 Rauvolfia cubana
       
5 (2) Corolla white, tube widened at middle; stamens inserted at middle of corolla tube   7 Rauvolfia verticillata
+ Corolla reddish, green, or yellow, tube widened at top; stamens inserted at corolla throat.   (6)
       
6 (5) Lateral veins of leaf blade prominent; inflorescences long, at least some branches puberulent; corolla greenish or green   5 Rauvolfia vomitoria
+ Lateral veins of leaf blade inconspicuous; inflorescences short, glabrous; corolla yellow   6 Rauvolfia tiaolushanensis

Lower Taxa


 

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