the world > plants > particular plants > plants and herbs > a grass or grasses > [noun] > dog's-tail grass (3)
More fully dog's-tail grass. A grass of the genus Cynosurus; esp. C. cristatus, having flattened panicles with the flowers pointing in the same…
Chiefly English regional (south-eastern). Dog's-tail grass (genus Cynosurus). Now rare.
The crested dog's-tail grass, Cynosurus cristatus. (Often taken as the type of something of little or no value: cf. rush, n.1 phrases 2).