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FOC | Family List | FOC Vol. 11 | Polygalaceae

1. Xanthophyllum Roxburgh, Pl. Coromandel. 3: 81. 1820.

黄叶树属 huang ye shu shu

Trees or shrubs. Leaves simple, alternate, without stipules, petiolate; leaf blade usually yellow-green when dry, leathery, veinlets reticulate, margin entire. Flowers bisexual, zygomorphic, shortly pedicellate, in racemes or panicles, axillary or terminal; bracts and bracteoles present. Sepals 5, imbricate, inner 2 slightly larger. Petals 5, differing slightly in size, imbricate, sometimes unguiculate, free, keel without apical appendages. Stamens 8; filaments free or 2-4 adherent at base of ovary, other 4-6 adherent at base of petals, ± slightly inflated, pubescent; anthers introrse, usually piliferous at base. Disk annular, fleshy, shorter than ovary. Ovary superior; carpels 2, connate, stalked, 1-loculed, glabrous or piliferous, placentation parietal; ovules 2 to numerous, anatropous; style 1, hairy; stigma capitate, shallowly lobed. Fruit a drupe, globose, fibrous-fleshy when dry, 1-loculed. Seed usually 1; seed coat membranous; caruncle absent; endosperm absent.

About 93 species: mostly in Australia, India, Indonesia, and Malaysia; four species (two endemic) in China.

1 Shrubs or small trees; leaf blade thickly papery, elliptic, apex caudate-acuminate, acumen to 3 cm.   1 X. oliganthum
+ Trees; leaf blade leathery, lanceolate or obovate-elliptic, apex not caudate-acuminate   (2)
2 (1) Axillary buds 2, overlapping; leaf blade linear-lanceolate; raceme axillary, shorter than 4 cm.   2 X. yunnanense
+ Axillary bud 1; leaf blade ovate-elliptic to lanceolate, not linear-lanceolate; raceme or panicle terminal or axillary, longer than 4 cm   (3)
3 (2) Inflorescences much branched, to 15 cm; flowers usually subopposite or pseudowhorled; leaf blade lanceolate to oblong-lanceolate, 10-24 × 2.5-6.5 cm.   3 X. flavescens
+ Inflorescences paniculate or racemose, 3-9 cm; flowers not subopposite or pseudowhorled; leaf blade ovate-elliptic to oblong-lanceolate, 4-12 × 1.5-5 cm.   4 X. hainanense

Lower Taxa


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