Pronunciation: /ˈspɪəgrɑːs/
noun
[mass noun]-
1any of a number of grasses with hard pointed seed heads, some of which are sharp enough to harm livestock. - Heteropogon, Stipa, and other genera, family Gramineae
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2chiefly NZ any of a number of spiny or prickly plants, in particular the piripiri and the Spaniard.