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・ Digitaria
・ Digitaria californica
・ Digitaria ciliaris
・ Digitaria cognata
・ Digitaria compacta
Digitaria didactyla
・ Digitaria eriantha
・ Digitaria exilis
・ Digitaria iburua
・ Digitaria insularis
・ Digitaria ischaemum
・ Digitaria pauciflora
・ Digitaria sanguinalis
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Digitaria didactyla : ウィキペディア英語版
Digitaria didactyla

''Digitaria didactyla'' is a species of grass known by the common names blue couch, Queensland blue couch, blue serangoon grass, green serangoon grass, blue stargrass,〔(''Digitaria didactyla''. ) Germplasm Resources Information Network.〕 and ''petit gazon'' (in Mauritius).〔Cook, B. G., et al. (''Digitaria didactyla''. ) Tropical Forages. CSIRO, DPI&F (Qld), CIAT and ILRI, Brisbane, Australia.〕 It is native to Mauritius, Réunion, parts of mainland Africa,〔 and Madagascar.〔(''Digitaria didactyla''. ) Grassland Species Profiles. FAO.〕 It has been introduced widely outside its native range, mainly for use as a pasture and turf grass. It has naturalized in some regions.〔
==Description==
This species is a mat-forming perennial grass with rhizomes and stolons. The stems can reach up to 63 centimeters long,〔(''Digitaria didactyla''. ) Grass Manual. Flora of North America.〕 but are generally 15 to 30 centimeters, with a creeping form, extending along the ground and rooting at the stem nodes.〔Clayton, W. D., et al. (2006 onwards). (''Digitaria didactyla''. ) GrassBase - The Online World Grass Flora. Accessed 20 June 2013.〕 The narrow leaf blades are up to 7 centimeters long, usually hairless, and green to blue-green in color. The inflorescence has 2 to 4 thin, finger-like branches each up to 7〔 to 10〔 centimeters long. They are lined with pairs of small spikelets each under 3 millimeters long.〔〔 The grass can grow into a dense, leafy stand up to 20 centimeters tall unless it is kept down, for example, with grazing.〔
This species is similar to southern crabgrass (''Digitaria ciliaris''), but with fewer, narrower inflorescence branches. It is also similar to bermudagrass (''Cynodon dactylon''), but with shorter, wider leaves which are more blue in color.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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