umbrella grass
noun› Any of several species of grasses and sedges:
1
Chloris truncata, a grass, early chloris (Australia), Australian finger grass, star grass, windmill grass.
2
Digitaria divaricatissima, a grass, spreading umbrella grass, spider-panic.
3
Many species of the grass genus Enteropogon, such as Enteropogon acicularis.
4
Cyperus alternifolius, a sedge.
5
Several species of the sedge genus Fuirena.