137 
rosa aquatica (L.) Beauv. WATER WHORL-GRASS.—a, A 
= fowered i spikelet b, a spikelet with 1 floret; ¢, the outer empty glumes; d, a 
106. ©. a Beauv. Agrost. a 1812. Spikelets small, ; Ueually + -flow- 
ere ed, hermaphrod i tl Emp if 
glumes 2, much pba than the flowering glumes, orisha ieee gad 
eer or = — a t the apex; flowering her rigid 
oriaceous, obtuse cea t the apex, ger at sama Fano 
pales spo pe ehumes rominently 2-nerv: ens3. Styles distinct; 
reeping aquatic grass, with h fiat leaves, and open pyram- 
ran 
plumose. 
pa reyes He nm asce! 
Species 1, in i cooler regions of Europe, Asia, and North America. 
