Juncus 燈心草屬

作者

KAO, Muh-Tsuen and DeVol, Charles E.; HUANG, Tseng-Chieng

型態特徵

Perennial or annual herbs, rarely shrub-like; stems terete or laterally flattened, erect, occasionally nodding above, as a rule simple. Leaves tufted, radical and cauline, occasionally reduced to bladeless or nearly bladeless sheaths at base of stem; blade, when developed, linear and dorsiventrally flattened or terete, glabrous except for pilose margins on some grass-like blades. Inflorescence corymbose, cymose, capitate or reduced to a single flower. Flowers usually with one or two bracteoles at base, usually bisexual; perianth segments 6, in two series, glume-like, free; stamens 3 or 6; ovary superior; locules1-3; stigmas 3; ovules anatropous, ascending. Capsule loculicidally dehiscent, 3-valved; seeds few to numerous.

屬

About 8 genera with more than 300 species, widely distributed in both hemispheres; two genera and about 10 species in Taiwan.

參考文獻

KAO, Muh-Tsuen and DeVol, Charles E.; HUANG, Tseng-Chieng, Flora of Taiwan, second edition 5: 147. 2000. (Fl. Taiwan 2nd edit.)

Juncus 燈心草屬

作者

KAO, Muh-Tsuen and DeVol, Charles E.; HUANG, Tseng-Chieng

型態特徵

Perennial or annual, glabrous herbs. Rhizome short or long creeping. Leaves various, grass-like, terete, stem-like or scale-like; sheath open on one side, auriculate apically. Flowers in cymes or heads, sometimes solitary; bracteoles present or absent; perianth segments 6, in 2 series, glume-like; stamens 3 or 6; ovary superior, 1-locular; plancetae parietal, sometimes reaching center and ovary apparently 3-locular; ovules numerous, anatropous; style 1; stigmas twisted. Seeds numerous, sometimes with a taillike appendage on one or both ends.

About 300 species in temperate and arctic areas, rarely tropical, about 6 species in Taiwan.