258 REPORT OF NEW JERSEY STATE MUSEUM. 



f. Spikes 2 mm. broad, scales reddish brown, with a green 

 mid-vein. E. oUvacea. p. 259 



ff. Spikes 2-3 mm. broad, scales very pale. 



B. ocreata, p. 259 



Eleocharis interstincta (Vahl.). Knotted Spike-rush. 



PI. XVII., Fig. 5. 

 Scirpus intcrstinctus Vahl, Emun. II. : 251. 1806 [Caribaeis]. — Keller and 

 Brown 61. — Stone, Proc. Acad. Nat. Sci., Phila., 1908. 458. 



Known only from a swamp at Repanpo in the Middle district, 

 where it was first discovered by Benjamin Heritage, July 15, 

 1892. 



Fr. — Mid-July to late August. 

 Middle District. — Repaupo. 



Eleocharis quadrangulata Michx. Quadrangular Spike-rush. 



PI. XVII., Fig. 6. 

 Scirpus quadrangulatus IMichaux, Fl. Bor. Am. I. 30. 1803 [Carolina]. 

 Eleocharis quadrangulata Torrcy, Ann. Lye. N. Y. III. 297. 1836. — Willis 



68. 

 Eleocharis mutata Britton, Jour. N. Y. Micros. Soc. V. 98. 1889. — Britton 



262. — Keller and Brown 62. 



Found in our region only in wet swamps in the Cape May 

 district, but occurs also at Swartswood Lake, Sussex Co. 

 Fr. — Mid-July to mid- August. 

 Cape May. — Dennisville, Dias Creek, Bennett, Cape May. 



Eleocharis robbinsii Oakes. Robbin's Spike-rush. 



PI. XVIL, Fig. 7. 

 Eleocharis Robbinsii Oakes, Hovey's Magazine VII. 178. 1848 [Pondi- 

 cherry pond, Jefferson, N. H.]. — Willis 67. — Britton, Jour. N. Y. Micros. 

 Soc. V. 99. 1889.— Gray Manual Ed. V. 557. 1867.— Britton 262.— 

 Keller and Brown 62. 



Growing in the water in Pine Barren streams and ponds, 

 frequent; rare and local in similar situations in the Middle 

 district. 



Fr. — Mid-July to mid-September, good fruit somewhat infre- 

 quent. 



Middle District. — Delanco, Union Grove (S), Fairton. 



Pine Barrens. — Toms River, Forked River, Dover Forge, Pasadena, Pleas- 

 ant Mills, Mullica River, Quaker Bridge, Chatsworth, Hammonton, Berlin, 

 Browns Mills (H), Dennisville. 



Cape May. — Town Bank. 



