Croton 巴豆屬
作者
HSIEH, CHANG-FU, CHAW, SHU-MIAW and WANG, JENN-CHE
型態特徵
Herbs, shrubs, or trees, often with milky juice, sometimes fleshy and cactus-like. Leaves alternate or rarely opposite, simple or variously compound, mostly stipulate. Flowers monoecious or sometimes dioecious, mostly actinomorphic, variously disposed, with or without perianth, sometimes with a corolla; perianth valvate or imbricate; sepals and petals usually distinct; disc often present, annular or of separate glands. Staminate flowers variable, with stamens usually as many or twice as many as the petals or reduced to one, distinct or mona-delphous; anthers mostly 2-celled. Pistillate flowers with or without staminodes, often pedicellate; ovary superior, consisting of 3 or sometimes 2, or more than 3, united, 1-celled or rarely 2-celled carpels; styles 3, distinct or basally connate, each often 2-lobed; stigmas 3 or 6; placentation axile; ovules one or less commonly 2, pendulous. Fruit usually a schizocarpous capsule splitting often elastically into three 1-seeded cocci that dehisce ventrally, sometimes a drupe; seeds often with a conspicuous caruncle; endosperm mostly copious, fleshy; embryo straight.
屬
A very large family containing about 300 genera and 8,000 species, mostly tropical and subtropical; 27 genera in Taiwan.
參考文獻
Croton 巴豆屬
作者
HSIEH, CHANG-FU, CHAW, SHU-MIAW and WANG, JENN-CHE
型態特徵
Shrubs or trees. Leaves alternate, biglandular at the base. Flowers small, solitary or clustered in a terminal raceme with small bracts. Male flowers: calyx 4–6-lobed, the lobes imbricate or subvalvate; petals as many; disc glands as many and opposite to the sepals; stamens indefinite, on hairy receptacle, free, incurved in bud. Female flowers: sepals more ovate than in the male; petals smaller or none; ovary 2–4-celled, the ovules 1 in each cell; styles long and slender. Capsules of three 2-valved cocci; seeds smooth, the testa crustaceous.
Species very numerous, about 700 in the tropics of the world. Two species in Taiwan.
種列表
- Croton bonplandianus 波氏巴豆
- Croton cascarilloides 裏白巴豆
- Croton caudatus 毛葉巴豆樹
- Croton ciliatoglandulosus
- Croton consanguineus
- Croton crassifolius 雞骨香
- Croton drupaceus
- Croton flavens
- Croton fragilis
- Croton glabellus
- Croton glandulosepalus
- Croton glandulosus var. septentrionalis 北美腺葉巴豆
- Croton gratissimus
- Croton heterocarpus
- Croton humilis
- Croton joufra 長果巴豆
- Croton laevifolius
- Croton laevigatus 光葉巴豆
- Croton leiophyllus
- Croton maritimus
- Croton monanthogynus
- Croton oblongifolius
- Croton peltatus
- Croton polyandrus
- Croton rhamnifolius
- Croton saipanensis
- Croton sp.
- Croton tiglium 巴豆
