Apiaceae
繖形科
特徵描述
[ Umbelliferae 繖形科 ]
作者
KAO, MUH-TSUEN
型態特徵
Perennial or annual herbs, rarely suffrutescent, caulescent or acaulescent; roots often thick,tuberous or fusiform; stems erect or creeping, usually fistulose or solid. Leaves alternate, simple or prominently divided and compound, the upper petioles frequently embracing young inflorescence with a dilated sheath-like base. Flowers yellow, white, pink, purplish or violet, bisexual or polygamous, in simple or compound umbels, sometimes capitate; calyx 5-toothed; petals 5, valvate or slightly imbricate in bud, free, deciduous, often incurved at apex; stamens 5, alternate with petals. the filaments filiform, incurved in bud; ovary inferior, bilocular; styles 2, often accrescent, usually with stylopodium; ovules solitary in each cell, pendulous. Fruit a schizocarp, bilocular, separating into 2 carpels (mericarps), these usually suspended from the top of the central column called carpophore, with 5 primary ribs and sometimes 4 intermediate or secondary ones; vittae (oil-tubes) often present; seeds with abundant endosperm and a small embryo.
屬
About 200 genera and 3,000 species distributed in the whole world. sixteen genera, about 29 species and two varieties in Taiwan.
參考文獻
- KAO, MUH-TSUEN. 1993. Flora of Taiwan, second edition 3: 1010. (Fl. Taiwan 2nd edit.)
- Hiroe, M. 1958. 1-219.
- Ohwi, J. 1965. 667-686.
- Walker, E. H. 1976. Fl. Okinawa and southern Ryukyu Is. 789-799.
Cryptotaenia 鴨兒芹屬
作者
KAO, MUH-TSUEN
型態特徵
Perennial herbs, erect, aromatic, glabrous, with fascicled roots. Leaves radical and cauline, ternate, membranaceous, the leaflets broad, biserrate or lobed. Umbels irregularly compound, forming panicles, loosely flowered; peduncles, rays, and pedicels very unequal, spreading-ascending involucre absent or 1–4-foliolate; involucels 2–6-foliolate. Flowers white; calyx-teeth obsolete; petals small, obcordate, incurved at apex; style erect or curved, the stylopodium conical, entire. Fruit glabrous, oblong, compressed, laterally canaliculate on the commissure, the carpels terete and 5-angled in cross section, the commissure plane or nearly so, the ribs present, subequal, the vittae 1–4 between the ribs, the carpophore bifid.
Few species in eastern Asia, Africa and North America. One species in Taiwan.
