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Umbelliferae

繖形科

特徵描述
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特徵描述

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.

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

Sanicula 山芹菜屬

作者

KAO, MUH-TSUEN

型態特徵

Herbaceous caulescent or acaulescent, scapose or branching, glabrous or pubescent, biennials or perennials from taproots, rootstocks, tubers or fascicled fibrous roots. Leaves membranaceous to subcoriaceous, palmately 3–5 lobed or rarely pinnately lobed, the segments toothed, lobed or dissected. Umbels irregularly compound; rays few; involucres entire or lobed; bracts longer or shorter than the rays. Flowers unisexual or polygamous; perfect flowers interior, sessile; staminate flowers usually stalked, exterior; calyx-teeth prominent; petals spathulate to ovate, with narrow inflexed apices; styles filiform, shorter or longer than the calyx-lobes, spreading, recurved, the stylopodium lacking or flattened and disc-like. Fruit globose or oblong-ovoid, somewhat compressed laterally, densely covered with prickles, spines or tubercles; ribs obscure; carpohore wanting; carpels subterete. Vittae 5 or more, usually obscure. Seed-face plane or sulcate.

參考文獻

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