特徵描述
作者
YING, Shao-Shun
型態特徵
Shrubs or perennial stout herbs; rhizome subterranean; stem woody or not, short or elongate. Leaves usually aggregated at base of stem or occasionally crowded at apex of branches; blade fleshy to coriaceous, often spine-tipped or with spiny margins. Flowers bisexual or unisexual, actinomorphic to zygomorphic, in racemes, spikes or panicles, sometimes in a large thyrse; perianth free or more or less highly connate; tube short to rather long; segments 6, equal to subequal; stamens 6, arising from perianth tube or from base of perianth segments, filaments free, anthers medifixed, linear, 2-celled; cells longitudinally dehiscent; ovary superior to inferior, 3-locular, placentation axile, or rarely 1 locular; ovules 2-numerous, 1-2-seriate superposed, rarely solitary; style and stigmas various. Fruit a loculicidally dehiscent capsule or baccate, or dry and indehiscent; seeds one to many, globose or somewhat compressed.
屬
About 18 genera, more than 500 species mainly in tropical and subtropical regions of the world; four genera, native and introduced, in Taiwan.
參考文獻
Dracaena 龍血樹屬
作者
YING, Shao-Shun
型態特徵
Shrubs to subshrubs; stem woody to rarely herbaceous, erect or nearly so, branched upward; the branches somewhat robust, ascending to erect, with distinct leaf scars. Leaves crowded at apex of branches, lanceolate to oblong or linear, chartaceous to coriaceous, sessile to petiolate, margins entire to wavy. Flowers rather many, in terminal racemes or panicles, pedicelled, 1-4 together; pedicels articulate; perianth salverform to campanulate, tube long or short, segments 6, subequal, narrow; stamens 6, inserted at apex of the perianth tube, filaments slender, filiform; anthers versatile; ovary superior, sessile, 3-celled, each cell with solitary ovule; style filiform, entire or subentire. Fruit a berry, globose; seeds 1-3, reniform.
