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FOC | Family List | FOC Vol. 19 | Annonaceae

14. Polyalthia Blume, Fl. Javae, Annonaceae. 68. 1830.

暗罗属 an luo shu

Authors: Bingtao Li & Michael G. Gilbert

Trees or shrubs. Inflorescences axillary, internodal, or leaf-opposed, sessile or shortly pedunculate, 1- to many flowered. Flowers usually bisexual. Sepals 3, usually small, valvate or rarely subimbricate in bud, free. Petals 6, in 2 whorls, free, valvate or rarely subimbricate in bud, subequal, flat and spreading; inner petals sometimes slightly larger or smaller than outer, concave and arched over stamens. Stamens usually many; anther locules cuneate; connectives apically orbicular or rhomboidal, concealing anther locules, apex flat-topped or slightly convex. Carpels rather few to many, free; ovules 1 or 2(or 3) per carpel, basal or sutural; styles absent, very short, or long; stigmas mostly dilated. Fruit apocarpous; monocarps few to many, short to long stipitate, mostly globose or ovoid, fleshy. Seeds 1 or 2(or 3) per monocarp, with a longitudinal circumferential groove.

About 120 species: Old World tropics from Africa to the W Pacific, with the center of distribution in SE Asia; 17 species (six endemic, one introduced) in China.

Molecular data (Mols et al., Amer. J. Bot. 91: 590-600. 2004) have shown that Polyalthia as traditionally delineated is polyphyletic and will eventually have to be divided among several genera.


Key to fruiting material (not seen for P. lancilimba)

1 Monocarps 0.5-0.8 cm, spherical   (2)
+ Monocarps 1-5 cm, globose, ovoid, or cylindric   (4)
       
2 (1) Monocarp stipes 1.5-2 cm.   8 P. cerasoides
+ Monocarp stipes 0.3-1 cm   (3)
       
3 (2) Monocarps to 7, stipes 3-4.5 mm.   10 P. florulenta
+ Monocarps to 18, stipes 8-10 mm.   12 P. suberosa
       
4 (1) Monocarps globose, densely minutely verrucate.   14 P. obliqua
+ Monocarps ovoid or cylindric, smooth or more coarsely verrucose   (5)
       
5 (4) Monocarps 1-1.5 cm   (6)
+ Monocarps 1.7-5 cm   (8)
       
6 (5) Leaf blade secondary veins 24-28 on each side of midvein, parallel.   7 P. pingpienensis
+ Leaf blade secondary veins 7-13 on each side of midvein, arcuately ascending   (7)
       
7 (6) Monocarp stipes 0.2-0.5 cm.   9 P. littoralis
+ Monocarp stipes 1-7 cm.   16 P. rumphii
       
8 (5) Young stems glabrous   (9)
+ Young stems hoary or minutely hairy   (12)
       
9 (8) Pedicel 0.5-0.7 cm; petals ca. 1.3 cm; monocarp stipes 0.5-0.7 cm   (10)
+ Pedicel 2-3.5 cm; petals 2.2-9 cm; monocarp stipes 1-7 cm   (11)
       
10 (9) Leaf blade membranous, densely verrucate, secondary veins 15-18 on each side of midvein, apex acuminate.   1 P. verrucipes
+ Leaf blade thinly papery, not verrucate, secondary veins 8-10 on each side of midvein, apex caudate.   3 P. chinensis
       
11 (9) Leaf blade secondary veins 10-16 on each side of midvein.   2 P. litseifolia
+ Leaf blade secondary veins 8 or 9 on each side of midvein.   17 P. liukiuensis
       
12 (8) Monocarp stipes 1-2 cm.   13 P. longifolia
+ Monocarp stipes 2.5-5 cm   (13)
       
13 (12) Young branches hoary; monocarps hoary.   4 P. fragrans
+ Young branches pubescent or puberulent; monocarps glabrous   (14)
       
14 (13) Leaf blade with pellucid dots, membranous to papery.   5 P. simiarum
+ Leaf blade without pellucid dots, thinly leathery to leathery   (15)
       
15 (14) Leaf blade 18-28 cm, secondary veins pubescent.   6 P. viridis
+ Leaf blade 8-20 cm, secondary veins glabrous.   11 P. laui

List of Keys

  • List of lower taxa


     

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  • Living Plant (Flower): Schatz 2886 (G.E. Schatz)
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