122 FLORA OF THE UPPER SUSQUEHANNA. 



C. bullata Schk. Bltton Sedge. Rare Wet ditch near Brush- 

 ville; Butlers Lake, Graves. The only stations. Specimen 

 identified by Prof. T. C. Porter. 



C. retrorsa Schwein. Retrokse Sedge. Not uncommon in 

 swamps and wet meadows. 



C. retrorsa Hartii (Dewey) A. Gray. Very rare. Swale near 

 Beebe's swamp. Graves. Verified by Prof. T. C. Porter. One 

 of the rarest of Pennsylvania carices. 



C. lurida Wahl. Sallow Sedgk. Plentiful throughout our range 

 in wet and sometimes in dry soil. 



C. lurida gracilis (Boott.) Bailey. Found in the same places as 

 the preceding, with \shich it is often confused. 



C. Schweinitzii Dewey. Schweinitz's Sed(;e. Veryrare. Found 

 at Beebe's swamp. Never reported from Pennsylvania but once 

 before and then by Schweinitz himself, Graves. 



C. hystrlcina Muhl. Porcipine Sedge. Less frequent than C. 

 lurida, with which it is often confounded. Found in marshes 

 and low ground. 



C. Pseudo=Cyperus L. Cvperus-like Sedge. Somewhat rare. 

 Lowe's Pond, town of Big Flats, Lucy Butler's Lake; Beebe's 

 Swamp, Graves. Pond Brook. Clute. Elsewhere not reported. 



C. Pseudo-C> perus Americana Hochst. More common than the 

 type and found in similar places. 



C. scabrata Schwein. Roi (;ii Sed(;e. Common in wet shades 



throughout. 



C. filiformis lanuginosa (Michx.) B. S. P. Woolly Sedge. Not 

 common. Botany Swamp. Elmira, Lucy. Bear Swamp, Graves. 

 Pond Brook, Clute. Not noted elsewhere. {C. filiformis var. 

 laiifolia B<i.ckl.) 



C. trichocarpa Muhl. Hairy-friti ed Sed(;e. Mutton-Hill Pond, 

 I'oino. Lisle. N. Y. ; not rare, Graves ; Clute. Not noted 

 elsewhere. The variety imberhis is reported from Beebe's 

 Swamp, {(iraves.) 



