Kyllinga 水蜈蚣屬
作者
KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao
型態特徵
Perennial or annual herbs, grass-like or rush-like, rarely with elongated woody caudices. Culms generally trigonous and solid. Leaves radical and/or cauline; blade linear or lanceolate-elliptic, sheathing at base, occasionally reduced to nearly bladeless sheaths; ligules present or absent; abaxial side of leaf sheaths sometimes projected beyond sheath orifice forming a tongue-like appendage (contraligule). Inflorescences various, mostly corymbose, paniculate, spicate, racemose or heads, subtended by leafy bracts, bearing 1 to numerous spikelets. Spikelets with few to many glumes; glumes imbricate or 2-ranked on a simple axis (rachilla); all or some glumes bearing an axillary flower or at times a bisexual cymule in axil, or rarely rachilla determinate with a single terminal pistillate flower and spikelet bearing 0-few small staminate partial spikelets in axils of some glumes. Flowers hermaphroditic or unisexual, without perianth or perianth of 3-many bristles or scaly segments. Stamens generally 1-3. Pistil bi- or tri-carpellate; styles 2- or 3-(rarely to 8-) fid at apex; ovary unilocular, with a single anatropous ovule; fruit an achene.
屬
A family of more than 5,000 species in 70-120 genera, distributed throughout the world under all ecological conditions, with the highest generic concentration in tropical South America. The family is divided into five tribes: Cariceae, Cypereae, Mapanieae, Rhynchosporeae and Sclerieae.
參考文獻
Kyllinga 水蜈蚣屬
作者
KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao
型態特徵
Spikelets bilaterally flattened with several glumes and 1-5 (1 or 2 in Taiwan species) flowers, falling entire; rachilla short, disarticulating above prophyll; glumes 2-ranked, folded, membranaceous to hyaline, lowest two smaller, than remainder, empty, succeeding glume(s) larger and flower-bearing, distal glume(s) empty or bearing staminate flower, base of glumes decurrent to rachilla; keel prominent, sometimes winged. Flowers bisexual and staminate; hypogynous bristles none; stamens 2 or 3; pistil digynous; achene bilaterally flattened with one angle facing rachilla, style not jointed at base, bifid at apex forming 2 stigmas. Perennial; rhizome short or horizontally creeping, sometimes knotty. Leaves basal, blades elongated or reduced. Inflorescence head-like with 1-few sessile spikes; spikes cylindrical, ellipsoid or globose, bearing many spikelets crowded on a short rachis.
Type species. Kyllinga brevifolia Rottb. About 40 species in temperate, subtropical and tropical regions of both hemispheres.
