CYPEBACEAE. 63 



14. Eleocharis tenuis (Willd.) Schultes. M. p. 171. Wet soil. Early 



summer. 



15. Eleocharis acuminata (Muhl.) Nees. 2^1. p. 171. Wet soil. Summer. 



£ueA-s— Sellersville (Fr.). 



16. Eleoch^ujis intermedia (Muhl.) Schultes. M. p. 171. Marshes. Sum- 



mer. 

 Philadelphia— (F.). Bucks— Point Pleasant, Mo^/er (P.). Lancaster 

 — (P.). Northampton— (P.). 



Ocean— Forked River (He.). Hunterdon— Bull's Islavid, Mart. (B.C.). 



17. Eleocharis rostellata Torr. M. p. 171. Marshes. Summer. 



Cape Mai/ —. Dennisville, E. Difenbaugh (B. C), Cape May (Ha.) 

 (He.). Atlantic— Atlantic City (C). 

 New Cosine— Collins Beach. 



4. STENOPHYLLUS Raf. 



1. Stenophyllus capillaris (L.) Britton. M. p. 173. Sandy fields. 

 Summer. 



5. FIMBRISTYLIS Vahl. 



Style 2-cleft; achene lenticular or biconvex. 



Culms 2-9 dm. tall; spikelets umbellate; style mostly pubescent. 



Perennial; leaves involute. 1. F. castanea. 



Annual ; roots fibrous ; leaves flat. 2. F. laxa. 

 Culms 2-10 cm. tall; very slender; spikelets capitate; style glabrous 



below. 3. F. Vahlii. 



Style 3-cleft; achenes 3-angled. 4. F. autumnalis. 



1. Fimbristylis castanea (Michx.) Vahl. M. p. 174. Salt marshes. 



Summer. 

 New Jersey — Frequent. 

 New Castle — Near tide-water. Scarce. 



2. Fimbristylis laxa Vahl. M. p. 174. Low ground. Summer. 



Philadelphia — (P.). Delaware — Mineral Hill (He.). Chester — Willis- 

 town (VP.). Lancaster — (P.). 



New C'asfZe— Serpentine, Dixon's, Commons. 



3. Fimbristylis Vahlii (Lam.) Link. M. p. 174. In moist soil. Summer. 



Philadelphia— (P.). Chester— (P.). Lancaster— (P.). 



4. Fimbristylis autumnalis (L.) E. & S. M. p. 174. Low grounds. 



Summer. 



6. SCIRPUS L. Club-Rush or Bulrush. 



Spikelet solitary, terminal, bractless or subtended by a single bract or short 

 leaf. 

 No involucral bract. 1. <Si. nanus. 



Involucral bract present, erect. 



Bract shorter than, or but little longer than the spikelets ; plant 



not aquatic. 2. S. planifolius. 



Bract at least twice as long as the spikelet ; plant aquatic. 



3. S. suhterminalis. 

 Spikelets normally more than 1, usually several or numerous, often appear- 

 ing lateral; involucral bract only 1. 

 Spikelets few, 1-12, appearing lateral. 



Culms not sharply 3-angled; achene plano-convex; annuals. 



