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23. Annona Linnaeus, Sp. Pl. 1: 536. 1753.
番荔枝属 fan li zhi shu
Authors: Bingtao Li & Michael G. Gilbert
Guanabanus Miller.
Trees or shrubs, with an indument of simple or stellate hairs. Inflorescences terminal, leaf-opposed, extra-axillary, or sometimes cauliflorous, never axillary, 1-flowered or in few-flowered clusters. Pedicel usually short. Sepals 3, small, valvate. Petals 6, in 2 whorls or inner whorl rudimentary or absent, free or connate at base; outer petals valvate, fleshy but leathery when dry, connivent or somewhat spreading, inside basally concave, margin thick; inner petals imbricate or valvate. Stamens many; filament short; connectives apically convex or apiculate. Carpels many, often connate; ovule 1 per carpel, basal; styles clavate; stigmas muriculate. Fruit syncarpous, surface covered with knobs, bulges, spines, or less often smooth. Seeds many per syncarp, embedded in edible pulp.
About 100 species: mostly in tropical America, a few in tropical Africa; seven species (all introduced) in China.
Annona includes several trees that have become widely grown for their fruit.
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| 1 |
Inner petals present |
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(2) |
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Inner petals absent or reduced to minute scales |
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(4) |
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| 2 (1) |
Carpels glabrous; ripe syncarp smooth. |
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1 A. glabra |
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Carpels pubescent; ripe syncarp with soft prickles |
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(3) |
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| 3 (2) |
Leaf blade elliptic, 14-24 cm, secondary veins punctate at base; inner petals glabrous. |
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2 A. montana |
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Leaf blade obovate-oblong to ovate-elliptic, 5-18 cm, secondary veins not punctate at base; inner petals pubescent. |
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3 A. muricata |
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| 4 (1) |
Leaf blade abaxially tomentose |
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(5) |
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Leaf blade abaxially pubescent or puberulent when young, glabrescent |
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(6) |
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| 5 (4) |
Axillary vegetative buds glabrous; leaf blade adaxially pubescent; leaves associated with flowering branches not auriculate. |
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4 A. cherimolia |
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Axillary vegetative buds pubescent; leaf blade adaxially glabrous; leaves associated with flowering branches auriculate. |
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5 A. diversifolia |
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| 6 (4) |
Outer petals outside surface and carpels hairy; ripe syncarp not pruinose, areoles flattened and separated by ± raised ridges; fruit pulp yellowish. |
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6 A. reticulata |
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Outer petals and carpels glabrous; ripe syncarp slightly pruinose, areoles convex and separated by deep grooves; fruit pulp whitish. |
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7 A. squamosa |
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Lower Taxa
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