GRAMINEvE. 



1003 



2. Floating Poa. Poa nuitans, Scop. (Fig. 1218.) 

 (Eng. Bot t. 1520. Glyceria Jluitans and G. plicata, Bab. Man.) 

 An aquatic perennial, often 2 or 3 feet 

 high or more, with rather thick but 

 weak stems, creeping at the base ; the 

 leaves often floating on the surface of 

 the water. Panicle erect and slender, 

 a foot long or more ; the branches few 

 and usually erect. Spikelets few, \ to 

 1 inch long, with from about 8 to near 

 20 flowers. Outer glumes unequal, thin, 

 and 1-nerved. Flowering glumes loose- 

 ly imbricated, 1J to near 3 lines long, 

 strongly 5- or 7-ribbed, scarious at the 

 top, obtuse or slightly pointed. 



In wet ditches, muddy places, and stag- 

 nant or slow-running waters, through- 

 out Europe and Russian Asia, except the 

 extreme north, and in North America. 

 Common in Britain. Fl. all summer. 



Fig. 



3. Sea Poa. Poa maritima, Huds. (Fig. 

 (Eng. Bot. t. 1140. Sclerochloa, Bab. Man 



A perennial, with a creeping rootstock 

 and decumbent or erect stems, attaining 

 about a foot in height. Leaves rather 

 short, narrow, and usually convolute. 

 Panicle erect, rather stiff, 3 or 4 inches 

 long, or sometimes more ; the branches 

 erect, or the lower ones spreading. 

 Spikelets not numerous, shortly stalked, 

 all turned to one side of the branches, 

 each about 6 lines long, and containing 

 about 6 or 8 flowers. Glumes near 1J 

 lines long, all rounded on the back, ob- 

 tuse and scarious at the top, and faintly 

 5-nerved, the lowest outer one rather 

 smaller. 



In maritime sands, common on the 

 coasts of Europe and western Asia, from 

 the Mediterranean to the Arctic Circle, 

 and in North America. Frequent all 

 round the British Isles. Fl. summer. 



Fig. 



