Orobanchaceae
列當科
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特徵描述
作者
YANG, Yuen-Po and LU, Sheng-You
型態特徵
Herbs, parasitic; stems usually simple. Leaves scale-like, spirally arranged. Inflorescences usually racemose or spicate. Flowers bisexual, zygomorphic, 1-bracteate, bracteoles 0–2, at base of calyx or on pedicel, absent in Aeginetia; calyx 4- or 5-toothed or lobed; corolla sympetalous, 5-lobed, limb oblique or bilabiate, upper lip entire, emarginate or 2-lobed, lower lip 3-lobed; stamens 4, didynamous, inserted on corolla tube and alternate with lobes, anthers often in pairs, 2-celled, longitudinally dehiscent, sometimes 1 cell fertile and the other sterile; ovary superior, 1-celled, usually with 4 parietal placentae, ovules 2–4 or many, antropous. Capsules usually opening by 2 or 3 valves; seeds 2–4 or numerous, minute.
屬
About 15 genera and 150 species in tropical, subtropical and temperate regions of the world; four genera in Taiwan.
