132 FLORA OF WASHINGTON AND VICINITY. 



Aristida purpurascens, Poir. 

 Little Falls (Dr. Vasey). 



'Spartina cynosuroides, Willd. Fresh-water Cord-Grass. 

 Flats under Cliain Bridge. August. 



Gymnopogon racemosus, Beauv. Naked-beard Grass. 

 Last half of September. 



Cynodon Daciylon, Fers. Bermuda-Grass. Scutch-Grass. 



All my efforts to find developed grains have thus far proved unavailing. July. 



tUletisine Indica, Gaertn. Crab-Grass. Yard-Grass. 

 July. 



Tricuspis seslerioides, Torr. Tall Red-top. 



August. 



i 'Dactylis glomerata, L. Orchard-Grass. 



Middle of May. J 



Xatonia Pennsylvanica, Gray. ' 



Varies much in appearance, there being a wood-form with slender culms and very 

 short upper leaves, and a meadow-form much taller and stouter, with the panicle i 



partly included and upper leaves flat, 5™"" wide and nearly a decimeter in length. \ 



Last half of May. 



Melica mutica, Walt. Melic-Grass. 

 Last of April or first of May. 



Glyceria nervata, Trin. Manna Grass. Fowl Meadow-Grass. 

 Last of May. « 



Glyceria aquatica, Smith. Reed Meadow-Grass, 

 Terra Cotta Swamp. Last of June or first of July. 



Glyceria fluitans, R. Br. 



Broadwater; found only in one of the many pools among rocks. July 6, 1879, 

 late; should bo collected in June. 



iPoa annua, L. Low Spear-Grass. 

 Last of April or first May. 



tPoa compressa, L. Wire-Grass. 

 Last of May or first of June. 



Poa compressa, L., var. gracilis (Oakes?). 



Habit very unlike that of the type, and more certainly indigenous. First half 

 of June. ( 



tPoa pratensis, L. Common Meadow-Grass. Kentucky Blue Grass. 

 Middle to end of May. 



Poa trivialis, L. Roughish Meadow-Grass. 

 Last half of May. 



Poa sylvestris. Gray. 

 Last half of May. 



