SPECIES AND VARIETIES. 335 



(304) Rhynchospora. BEAK-SEDGE. 



R. alba : stems 6-9 inches high, slender, forming dense 

 tufts ; leaves chiefly radical, short, subulate, the floral ones 

 scarcely exceeding the flowers; spikelets nearly white, in a 

 small, loose terminal cluster, often with one or two smaller 

 clusters on slender peduncles in the axils of the next leaves. 

 Turfy bogs. Fl. July. 



(305) Milium. MILLET-GRASS. 



M. efiusum : stem tall, slender, 4-5 feet high ; leaves 

 short, flat; panicle long, loose, slender, spreading. Moist 

 woods. Fl. June, July. 



(306) Digraphis. 



D. arundinacea : stems reed-like, 2-3 feet high ; leaves 

 rather broad, long; panicle upright, with short spreading 

 branches; spikelets numerous. River-banks arid marshes. 

 Fl. July. The Ribbon-grass of gardens is a variety with va- 

 riegated leaves. 



(307) Phleum. CAT'S-TAIL-GRASS. 



P. pratense: stem 1-3 feet high; leaves rough on the 

 edges ; spike or spike-like panicle cylindrical, very compact, 

 1-4 inches long ; outer glumes truncate at top, with broad 

 scarious edges. Timothy-grass. Meadows and pastures. Fl. 

 June to October. 



P. arenariurn : annual ; stem erect, 6-8 inches high ; leaves 

 short; spike about an inch long, dense, nearly cylindrical, 

 tapering at the base; spikelets about 1^ line long; outer 

 glumes lanceolate, tapering into a short point. Maritime 

 sands. Fl. June. 



