Additions to the Flora of Washington. 39 



982. Commelina hirtella Vahl (C. erecta L) 

 Bennings Bridge. The author. 



*982. Commelina communis L. 

 Magnolia Run, Rock Creek Park. G. H. Hicks. 



983. Commelina Virginica L. 



Flats of the Potomac under Chain Bridge. The author. 

 985. Xyris flexuosa Muhl. 



Along the railroad track near Carlins, Va. G. H. Hicks. Sphagnum 

 swamps in the woods near Surattsville. The author. 

 988. Cyperus aristatus Rottb. (C. inflexus Muhl.). 



Muddy bottom of Potomac, opposite mouth of Cabin John Run, Md. 

 G. H. Hicks. 

 998. Cyperus retrofractus Torr. 



South Brookland. The author. 

 *999a. Kyllinga pumila Michx. 



Holmead swamp. M. B. Waite. 

 * lOOOa. Hemicarpha subsquarrosa Nees. 



Potomac flats opposite the Ninth lock, Md. G. H. Hicks. 

 *1004rt. Bleocharis intermedia Schult. 



Opposite the Eighth lock, Md. G. H. Hicks. 

 1007. Scirpus planifolius Muhl. 



On dry, grassy slopes in the Zoological Park. The author. 

 1010. Scirpus debilis Pursh. ' 



Potomac flats opposite the Ninth lock, Md. G. H. Hicks. Sphagnum 

 swamp near Silver Hill. The author. 

 1017. Eriophorum Virginicum L. 



Sphagnum swamp near Surattsville. The author. 



1019, Fimbristylis capillaris Gr. 



Along the railroad track near Carlins, Va. G. H. Hicks. North 

 Brookland. A. J. Pieters. 



1020. Rhyiicospora alba Vahl. 



Sphagnum swamp near Surattsville. The author. 

 1021a. Rhyncospora cephalantha Gr. 

 Common in swamps around Surattsville and Silver Hill. The author. 



1024. Scleria pauciflora Muhl. 



Grassy knoll near Aqueduct Bridge on the Virginia shore of the Poto 

 mac. The author. 



1025. Carex polytrichoides Muhl.* 



Magnolia Run, Rock Creek Park ; Sphagnum swamp near Suratts 

 ville. The author. 



1026. Carex Willdenovii Schk. 



Bunker Hill ; Corco ran's woods. The author. 



* Professor Charles F. Wheeler has kindly revised the entire collection 

 of the genus Carex recorded here. 



