PUANTS OF SOUTHERN NEW JERSEY. 257 



Middle District.— -tiew Egypt, Florence, Birmingham, Delanco (S), Med- 

 ford (S), Lindenwold, Paulsboro, Swedesboro, Sharpstown, Dividing Creek 



Pine Barrens.-Toms River (NY), Lalcehurst, Forked River, Waretown, 

 Bear Swamp (S), Hammonton (NY), Landisville, Petersburg (S), Egg 

 Harbor (NB). 



Cape May.— Cape May, Town Bank. 



ELEOCHARIS R. Brown. 



Key to the Species. 



a. Spikes 2-6 cm. long of nearly or quite the same diameter as the culms. 

 b. Scales blunt and rounded, spike blunt, cylindrical. 



c. Culm, four-angled. £. quadrangulata, p. 258 



cc. Culm terete. B. interstincta, p. 258 



'bb. Scales sharp pointed, spike linear, awl-shaped. B. robbinsii, p. 258 

 aa. Spike much thicker than the culm. 

 b. Spike 6-is mm. long. 



c. Mature spikes at least 3 mm. thick. 

 d. Scales pointed, tips spreading. 



e. Culms 3-IS dm. tall, stout. E. palustris, p. 260 



ee. Culms 2-4.5 dm. tall, slender. B. glaucescens, p. 260 



dd. Scales blunt, spikes more or less globose. 



e. Scales short and rounded, closely imbricated. 



f. Spikes globose. B. obtusa, p. 259 



//. Spikes oblong, cylindric. B. engelmanni, p. 260 



ee. Scales longer and more loosely arranged. 

 f. Scales brown with a lighter mid-vein.' 



B. melanocarpa, p. 262 

 //. Scales greenish with a dark mid-vein. 

 g. Spike ovoid, culms not rooting at tip. 



J3. tuberculosa, p. 261 

 gg. Spike spindle shaped, sterile culms often rooting at 

 tip. B. rostellata, p. 264 



cc. Mature spikes less than 3 mm-, thick. 



d. Scales minute, rounded, closely imbricated, spike cylindrical, 

 6-15 mm. long. B. tricosiata, p. 262 



dd. Scales larger, more loosely arranged, spikes 4-6 mm. long. 



B. tenuis, p. 263 

 bb. Spikes 2-6 mm. long. 



c. Culms spirally twisted. B. tortilis, p. 263 



cc. Culms not twisted. 



d. Culms 2-4 dm. high. B. tenuis, p. 263 



dd. Culms not over 2 dm. high (seldom over l-S dm.). 

 e. Culms capillary. 



/. Spikes two to six-flowered, i mm. broad. 



B. acicularis, p. 260 

 ff. Spikes six to many-flowered, culms often proliferous. 



B. torreyana, p. 261 

 ee. Culms thicker. 

 17 MUS 



