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FOC | Family List | FOC Vol. 13 | Melastomataceae

2. Melastoma Linnaeus, Sp. Pl. 1: 389. 1753.

野牡丹属 ye mu dan shu

Otanthera Blume.

Shrubs or small shrubs. Stems 4-sided or nearly terete, often squamose-strigose. Leaves opposite, petiolate; leaf blade pubescent on both surfaces, secondary veins 2 or 3(or 4) on each side of midvein, margin entire. Flowers terminal or on top of branches, solitary, clustered, or panicled, 5-merous, showy. Hypanthium globose-urceolate, pubescent or squamose strigose. Calyx lobes lanceolate to ovate, lobulate or not. Petals usually obovate, oblique. Stamens 10, whorls very unequal in length. Longer stamens with purple anthers; connective long extended at base, adaxially with 2 tubercles. Shorter stamens with yellow anthers; connective not extended but with 2 abaxial tubercles. Ovary half inferior, ovoid, 5-celled, apex with dense trichomes; placenta axile, sometimes fleshy in fruit. Style filiform, as long as petals. Fruit a capsule or sometimes berrylike, porose dehiscence or transverse dehiscence at middle, pubescent or squamosly strigose. Seeds numerous, small, cochleate, densely punctate.

Twenty-two species: SE Asia, N Australia, Pacific islands; five species (one endemic) in China.

The genus was revised by Meyer (Blumea 46: 351-398. 2001).

1 Shrublets to 0.3 m tall, sometimes repent; leaf blade smaller than 4 × 3 cm   (2)
+ Shrubs or trees, 0.5-3(-7) m tall, erect; leaf blade larger than 4 × 3 cm   (3)
2 (1) Leaf blade ovate to elliptic, 1-4 × 0.8-2(-3) cm.   1 M. dodecandrum
+ Leaf blade oblong to lanceolate-ovate, 2-4 × 1-1.5 cm.   2 M. intermedium
3 (1) Hypanthium spreading hispid; fruit with stiff often retroflexed trichomes.   3 M. sanguineum
+ Hypanthium squamose or compressed strigose; fruit densely appressed squamose strigose   (4)
4 (3) Petiole 1.8-6.5 cm; leaf blade broadly ovate to broadly elliptic, 5.5-13.5 cm wide, secondary veins (2 or)3 on each side of midvein.   4 M. imbricatum
+ Petiole 0.5-1.9 cm; leaf blade ovate, elliptic, or elliptic-lanceolate, 1.7-3.5(-6) cm wide, secondary veins 2(or 3) on each side of midvein.   5 M. malabathricum

Lower Taxa


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