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8. Psidium Linnaeus, Sp. Pl. 1: 470. 1753.
番石榴属 fan shi liu shu
Guajava Miller.
Shrubs or small trees. Bark gray, smooth. Branchlets pubescent. Leaves opposite, petiolate; leaf blade pinnately veined. Flowers axillary, large, usually 1 or 2 per axil. Bracts 2. Hypanthium campanulate or urceolate. Calyx lobes 4 or 5, unequal. Petals 4 or 5, white. Stamens many, separate, in many whorls; anthers ellipsoid, basifixed, locules parallel, longitudinally dehiscent. Ovary inferior, adnate to hypanthium, 4- or 5-loculed or more; ovules numerous. Style linear; stigma expanded. Berry globose to pyriform, fleshy, many-seeded, apex with persistent calyx lobes; placenta well developed, fleshy. Seed coat hard; embryo curved; hypocotyl long; cotyledons short.
About 150 species: tropical America; two species commonly cultivated in China with one naturalized.
Psidium guineense Swartz (P. laurifolium O. Berg) has also been recorded as occasionally being cultivated in China.
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Branchlets terete; leaf blade elliptic to obovate, abaxially glabrous, secondary veins obscure. |
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1 P. cattleyanum |
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Branchlets angled; leaf blade oblong to elliptic, abaxially pubescent, secondary veins obvious. |
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2 P. guajava |
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Lower Taxa
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