Synonyms for Foxtail Grass (same or very similar meaning)
WordNet sense 1 (ground pine thickly covered with bristly leaves; widely distributed in barren sandy or peaty moist coastal regions of eastern and southeastern United States):
Lycopodium alopecuroidesWordNet sense 2 (grasses of the genera Alopecurus and Setaria having dense silky or bristly brushlike flowering spikes):
foxtailFrom the ODE community, based on WordNetadd/edit