126 FLORA OF WASHINGTON AND VICINITY. 



tScirpus planitolius, Mulil. 



Kalorama Heiglits, also near the East Corner of the District. Last half of May. 



Scirpus pungens, Vahl. 



Shores of the Potomac, between tides. Culms often twisted. June, July. 



Scirpus validus, Vahl. Great Bulrush. Tule. 

 June, July. * 



Scirpus debilis, Pursh. 



Terra Cotta; also on the Flats below Chain Bridge. Middle of September. 



Scirpus fluviatilis, Gray. River Club-Rush. 



July. 



Scirpus sylvaticus, L. Wood Club-Rush. 



Anacostia Road above Uuiontown (Dr. Vasey, 1881). Last half of July. 



t Scirpus atrovirens, Muhl. Club-Rush. 

 July. 



Scirpus polyphyllus, Vahl. 

 June, July. 



Scirpus lineatus, Michx. 

 June. 



t Scirpus Eriophorum, Michx. Wool-Grass. Clump-head Grass. 



August. 



t Eriophorum Virginicum, L. Cotton-Grass. 



Terra Cotta Swamp. August ; fruit, end of September. 



Fimbristylis autumnalis, Roem. & Schultes. 

 .July to September. 



Fimbristylis capillaris, Gray. 



Reform School. September 15, 1878 (late). 



Rhynchospora alba, Vahl. Beak-Rush. 

 Holmead Swamp. July, August. 



+ Rhynchospora glom.erata, Vahl. 

 July. 



Scleria triglomerata, Vahl. Nut-Rush. 



Near the Agricultural College, Md. (Dr. Vasey). 



Scleria oligantha, Ell. 



Rock Creek above Davis's Quarry; June 1874 (Dr. Vasey). 



Scleria pauciflora, Miihl. 



Rock Creek above Davis's Quarry (Dr. Vas(\y); near the crossing of the Beunings 

 Road and the Anacostia Road. May, June. 



Carex polytrichoides, Muhl. Sedge. 



June. 



