68 FLOBA OF PHILADELPHIA. 



8. Rynchospora fusca (L.) R. & S. M. p. 185. Low grounds. Summer. 



Burlington — QnsikeT Bridge (C). Camden — Spring Garden (C). 

 Gloucester— Mickleton (C). Atlantic— 'Egg Harbor (He.). Ocean — 

 Manchester (C), Forked Eiver (He.). 



9. Eynchospora gracilenta a. Gray. M. p. 186. Pine-barren swamps. 



Summer. 

 Burlington— (^uakeT Bridge (C), Atsion (He.). GioMcesier— Mickle- 

 ton (C). Atlantic — Egg Harbor (Li.). 

 New Castle— 'Kiamensi. 



10. Rynchospora cymosa Ell. M. p. 186. Low grounds. Summer. 



BmcA's— Bristol (P.), Tullytown (Sa.). DelaivareSpTmg House, Tin- 

 icum, A. H. Smith (Fu.) (B. Sm.). Lancaster— (P.). 



Camden— Gri&th's Swamp (C), Lindenwold (VP.). Gloucester— TSIeav 

 Mickleton (He.). Monmouth— VfoodhvLVj Pond, Squan (C). Mercer — 

 Princeton, Hightstown (C). Hunterdon— Bjram. (C). 



New Castle — Common. 



11. Rynchospora Torreyana A. Gray. M. p. 186. Wet pine barrens. 



Summer. 

 Burlington— Quaker Bridge, Atsion (C). Atlantic— Pleasant Mills, 

 Main Road Station (C), Egg Harbor (He.) (Li.) (Wn.). 



10. CLADIUM P. Br. TwiG-RusH. 



1. Cladium mariscoides (Muhl.) Torr. M. p. 186. Marshes. Summer. 

 Lancaster— (P.) . 

 New Jersey— Piequent. 



11. SCLERIA Berg. Nut-Rush. 



Spikelets in terminal, or terminal and lateral clusters; achene supported on 

 a hypogynium. 

 Achene smooth. 1. S. triglomerata. 



Achene reticulated or irregularly rugose. 



Culms erect or ascending; achene reticulated; leaves 2-3 mm. wide. 



2. S. reticularis. 

 Culms spreading; achene irregularly rugose; leaves 4-8 mm. wide. 



3. S. Torreyana. 

 Achene papillose. 4. S. pauciflora. 



Spikelets interruptedly glomerate-spicate ; no hypogynium. 



5. S. verticillata. 



1. ScLERiA triglomerata Michx. M. p. 186. Meadows and thickets. Sum- 



mer, 

 ^wc^'s— Nockamixon (Fr.). Delaivare—l^eaT Spring House, Tinicum, 

 Dr. Geo. Smith (Fu.). Chester— (P.). Lancaster— (P.). 

 Neiv Jersey— Frequent. 

 New Castle — Frequent. 



2. Scleria reticularis Michx. M. p. 188. Moist meadows. Summer. 



Detoware— Near Spring House, Tinicum, Dr. Geo. Smith (Fu.). Lan- 

 caster — Pleasant Grove (P.). 



Atlantic— Mam Road Station (C). Oceaw— Manchester (C). 

 Nevj Castle — Newark, not common. 



