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FOC | Family List | FOC Vol. 15 | Oleaceae

6. Chionanthus Linnaeus, Sp. Pl. 1: 8. 1753.

流苏树属 liu su shu shu

Linociera Swartz.

Trees or shrubs, usually evergreen. Leaves opposite, simple, petiolate; leaf blade entire. Inflorescences axillary or rarely terminal panicles, sometimes cymes, umbels, heads, racemes, or fascicles. Flowers bisexual. Calyx small, 4-toothed or 4-lobed. Corolla white or yellow, 4-parted; lobes almost free to base or united into a very short tube or joined in pairs at base, valvate in bud. Stamens 2, inserted at base of corolla lobes; anthers elliptic or long elliptic, subextrorse. Ovules 2 in each locule, pendulous. Style short; stigma entire or 2-cleft. Fruit a drupe; endocarp bony. Seeds usually 1; endosperm fleshy or absent; radicle upward.

About 80 species: tropical and subtropical Africa, America, Asia, and Australia; 7 species in China.

Chionanthus and Linociera were treated as independent genera in FRPS. Although Chionanthus species are evergreen and pantropical and those of Linociera are deciduous and grow in temperature E Asia and North America, the two genera are indistinguishable morphologically and are best treated as one. Chionanthus caudatus (Collett & Hemsley) Bahadur & Gaur has been recorded near the border in Myanmar but not, so far, from China. It would key out at C. ramiflorus in the following key, but would be distinguished by its oblong-elliptic leaf blades with caudate-acuminate apices and petioles 7-10 mm.

1 Leaves deciduous; corolla 12-30 mm   1 Chionanthus retusus
+ Leaves evergreen; corolla 2-8 mm.   (2)
2 (1) Petiole 1-2 mm; inflorescences 1-1.5 cm   2 Chionanthus brachythyrsus
+ Petioles usually longer than 1.5 cm; inflorescences at least 2 cm.   (3)
3 (2) Corolla 5-8 mm   3 Chionanthus longiflorus
+ Corolla usually less than 5 mm.   (4)
4 (3) Leaves 16-33 cm, oblanceolate; fruit 5-10 × 2.5-5 cm   5 Chionanthus henryanus
+ Leaves 5-20 cm (rarely to 30 cm in C. ramiflorus), elliptic, oblong, obovate-lanceolate, to lanceolate or suborbicular; fruit 1-3 × 0.5-2.2 cm.   (5)
5 (4) Leaves with 5 or 6 primary veins on each side of midrib; young stems and inflorescences puberulent   7 Chionanthus guangxiensis
+ Leaves with 7-10 primary veins on each side of midrib; young stems and inflorescences usually glabrous.   (6)
6 (5) Leaves 5-11 × 1.5-4 cm, without dense, raised pimples beneath when dried; fruit longitudinally ribbed when dried   4 Chionanthus hainanensis
+ Leaves (5-)8-20(-30) × (2.5-)4-7(-12) cm, with dense, raised pimples beneath when dried; fruit without longitudinal ribs when dried   6 Chionanthus ramiflorus

Lower Taxa


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