PLANTS OF SOUTHERN NEW JERSEY. 267 



c. Involucral leaf blunt. S. torreyi, p. 270 



cc. Involucral leaf pointed. 



d. Plant smaller, 3-12 dm. tall ; involucral leaf 35-100 mm. 



S. americanus, p. 269 

 dd. Plant larger, 6-21 dm. tall ; involucral leaf 12-35 ™m- 



5". olneyi, p. 269 

 bbb. Culms, three angled, spikelets 10-20 mm. long, 6-10 mm. thick. 



S. paliidosus, p. 271 

 aaa. Spikelets numerous, in clusters or single on pedicels, forming an umbel. 

 b. Spikelets large and thick, 15-40 mm. long. 



c. Spikelets pale brown. 6*. Huviatilis, p. 271 



cc. Scales of spikelets streaked with red (maritime). 



S. robustiis, p. 270 

 bb. Spikelets small, not over 6 mm. long. 



c. Culm terete, leaves reduced to sheaths on the culm. 



S. valid us, p. 270 

 cc. Culm triangular. 



d. Heads dense, star-shaped, spikelets blackish green. 



5". atrovirens, p. 271 

 dd. Umbel more open, spikelets often solitary or only 2 or 3 on a 

 peduncle. 

 e. No hair-like bristles projecting from the scales. 



5. lineattis, p. 272 

 ee. With projecting hair-like bristles, giving the spikelets a 

 downy appearance. 



f. Spikelets blackish green, with a black band below the 

 inflorescence. 5". longi, p. 272 



ff. Spikelets rusty brown. 



g. Spikelets in clusters of 3-15. .S*. cyperiniis, p. 272 

 gg. Spikelets on individual peduncles. 



S. criophoriim, p. 273 



Scirpus nanus Spreng. Dwarf Club-rush. 

 PI. XX., Fig. 3- 



Scirpus nanus Sprengel, Pug. I. 4. 1813 [Saxony]. — Britton 264.— Keller 



and Brown 64. 

 Bleocharis pygmcca Torrey, Ann. Lye. N. Y. III. 313. 1836.— Willis 68. 



Salt marshes on the coast. In Britton's Hst, as well as that of 

 Keller and Brown, this species is said to be frequent, but I have 

 not found it so, nor do there seem to be many specimens pre- 

 served from the State. 



Fr. — Early July into September. 



Maritime.— Vt. Pleasant, St. Albans (L), Ship Bottom (L), Beach Haven 

 Terrace (L), Beesley's Pt. (H), Cold Spring. 



