Melastomataceae

野牡丹科

APG 4

Melastomataceae 野牡丹科

特徵描述

屬列表

標本列表

特徵描述

作者

HUANG, SHING-FAN and HUANG, TSENG-CHIENG

型態特徵

Herbs, shrubs or trees, erect, climbing or epiphytic; branches terete or tetragonous. Leaves opposite, rarely verticillate, simple, usually with 3–9 palmate veins, estipulate. Flowers bisexual, actinomorphic, sometimes slightly zygomorphic as to androecium, mostly 4–5-merous, solitary or in simple or compound cymes. Calyx tubular, free or adnate to the ovary; lobes imbricate or valvate. Petals imbricate, free, rarely connate at the base. Stamens usually as many as or twice as many as the petals, equal or unequal; filaments distinct, often bent and inflexed; anthers typically 2-celled, introrse, basifixed, dehiscing by a single (rarely 2) pore rarely by 2 longitudinal slits, the connectives often thickened at the base and produced, sometimes vanously appendaged. Ovary mostly inferior, 4–5-celled, the placentas axile, rarely parietal or basal, the ovules numerous; style and stigma simple. Fruit a loculicidally dehiscent capsule or a berry. Seeds often minute; embryo straight or conforming to the shape of seed when large; endosperm absent.

屬

A large family of about 240 genera and 4,000 species, tropical and subtropical; 11 genera in Taiwan.

參考文獻

HUANG, SHING-FAN and HUANG, TSENG-CHIENG, Flora of Taiwan, second edition 3: 905. . (Fl. Taiwan 2nd edit.)

Memecylon 羊角扭屬

作者

HUANG, SHING-FAN and HUANG, TSENG-CHIENG

型態特徵

Glabrous shrubs or trees. Leaves opposite, coriaceous, entire, usually penninerved, short-petioled or sessile. Flowers in small axillary or terminal, simple or panicled cymes or umbels; calyx-tube campanulate, glabrous, the limb truncate or 4-lobed; petals 4, usually blue, purple or white; stamens 8, equal, the filaments long, the anthers short, opening by slits in front, the connectives ending in a posterior horn, ovary inferior, 1-celled, the apex a depressed disc with 8 radiating grooves; style filiform, simple; ovules 6 to many, on a free central placenta. Fruit a globose 1-seeded berry, crowned by the calyx-margin; seed large; cotyledons convolute.