130 FLORA OF WASHINGTON AND VICINITY. 



Carex vestita, Willd. 



Sligo Creek ; Bladensburg. Middle of May. 



t Carex riparia, Curtis. 



Eastern' Branch Marsh. Last of May or tirst of June. 



Carex comosa, Boott. 

 Last half of May. 



Carex Pseudo-Cyperus, L. 



Swamps, Rock Creek Region (Dr. Vasey). 



Carex hystricina, Willd. 



Flats of the Potomac below Chain Bridge, June 5, 1881 ; then in good condition. 

 Plant deep green. 



t Carex tentaculata, Muhl. 



Bracts conspicuously sheathing. Spikes not sessile, the lower sometimes on long 

 stalks Sf:™ or 10"^™ long; perigyuia 8"'™ to 10°"'^ long. The typical form has not 

 been found. I collected a remarkably etiolated state of this on the Eastern Branch 

 Marsh (see p. 33). Last of May or in June. 



Carex intumescenSj.Rudge. 

 End of May. 



t Carex lupulina, Muhl. 

 Last half of May. 



Carex foUiculata, L. 

 Last half of May. 



t Carex squarrosa, L. 



Last of May or in June. 



Carex stenolepia, Torr. 

 June. 



Carex bullata, Schk. 



Meadow near the Anacostia Road and Beaver Dam Branch ; also, Reform School. 

 Last half of June and to middle of July. 



GRAMINEiE. 



Grass Family. 



tLeersia Virginica, Willd. White Grass. 



August. 



tLeersia oryzoides, Swartz. Rice Cut-grass. 

 August, September. 



tZizania aquatica, L. Indian Rice. Water Oats. 



August, September. 



Alopecuru3 geniculatus, L. Floating Foxtail Grass. 



Marsh at mouth of Hunting Creek. Middle of May to middle of June. 



