Guttiferae

金絲桃科

APG 4

Hypericaceae 金絲桃科

特徵描述

屬列表

標本列表

特徵描述

作者

ROBSON, NORMAN K. B.

型態特徵

Trees, shrubs or herbs with various glandular secretions. Leaves simple, entire, opposite and exstipulate. Inflorescences various. Flowers bisexual or unisexual, regular. Sepals (2-)4-5(-6), imbricate or decussate, the inner ones sometimes petaloid. Petals 4-5(-10), free, imbricate or contorted in bud. Stamens indefinite, free or in 4-5(-10) free or variously united fascicles, often with the antisepalous fascicles sterile or absent. Ovary superior, 1-12-locular, with axile or parietal or basal placentation; ovules 1 to many; styles 1-5 or absent, the stigmas 1-12. Fruit a capsule, berry or drupe. Seeds 1 to many, without endosperm; embryo various; aril present or not.

屬

A family of 40 genera and about 900 species, chiefly tropical and subtropical but with two genera (Hypericum and Triadenum) in temperate regions; four genera and 20 species in Taiwan.

參考文獻

ROBSON, NORMAN K. B., Flora of Taiwan, second edition 2: 694. 1996. (Fl. Taiwan 2nd edit.)
Li, X. W., Flora Reipublicae Popularis Sinicae 50(2): 1-109. 1990. (Fl. Reip. Pop. Sin.)

Hypericum 金絲桃屬

作者

ROBSON, NORMAN K. B.

型態特徵

Shrubs or perennial to annual herbs, glabrous (in Taiwan), with translucent ('pale') and often opaque, black or reddish ('dark') glands. Leaves opposite, entire. Inflorescence terminal and sometimes axillary, cymose. Flowers bisexual. Sepals 5, quincuncial. petals 5, yellow to orange, sometimes tinged or veined red, usually asymmetrical, persistent or deciduous. Stamens in 5 free antepetalous fascicles or united to form 4 (i. e., 2+1+1+1) or 3 (i. e., 2+2+1) fascicles with the compound fascicles antesepalous or apparently irregular and not fascicled, persistent or deciduous, each single fascicle with up to 70 stamens, with filaments slender, free almost to the base; anthers dorsifixed, dehiscing longitudinally, with gland on connective; staminodes and sterile fascicles absent. Ovary 3-5-locular with axile placenta or ± completely 1-locular with (2)3-5 parietal placentae, each placenta with many ovules; styles (2)3-5, free or partly to completely united, ± slender; stigmas small or ± capitate. Fruit a septicidal capsule, the valves often with resin-containing vittae or vescicles; seeds small, often carinate or ± winged, with testa variously sculptured, not arillate; embryo slender, straight, with distinct cotyledons.