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Taiwan Gramineae | Family List | Poaceae

Cynodon Rich.

狗牙根屬

Cynodon dactylon
leaf cs section-2

Credit: cs kuoh

Perennials; culms slender, the leafy part of the erect culms with alternately long and short internodes; leaf sheath bearded at mouth; ligule short, truncate. Blades with margins involute when dry. Inflorescence composed of 2 to sever slender, digitately arranged spikes. Spikelets sessile, strongly laterally compressed, small, usually 1-flowered, unawned, alternate, imbricate along one side of rachis, with upper glume outside; rachilla articulate below lemma, protruding or not, sometimes with a rudimentary flower; glumes smaller than lemma; seldom equal, narrow, keeled, acute or mucronate, 1-nerved or upper glume 3-nerved, both or only the lower glume persistent; lower lemma boat-shaped, firmly herbaceous, keeled; lodicules 2, minute; stamens 3; ovary glabrous, the styles 2, free, the stigmas plumose, protruding sideways. Caryopsis oblong, terete or laterally compressed, the pericarp easily separating when soaked, the hilum linear; embryo small.

About ten species distributed in tropical and subtropical regions.

Two species are found in Taiwan.


KEY TO THE SPECIES

1 Spikes about 10 cm long; flowering culms more than 25 cm high; ligule membranous   Cynodon arcuatus
+ Spikes up to 6 cm long; flowering culms less than 15 cm high; ligule a ring of hairs   Cynodon dactylon

Lower Taxa


 

Related Objects  

Flora of China  
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