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-ico mm. 



5. americanus, p. 269 

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



S. olneyi, p. 269 

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



S. paludosuSj 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 brovv^n. S. Utiviatilis, p. 271 



cc. Scales of spikelets streaked vi^ith red (maritime). 



S. robustus, p. 270 

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



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



5*. validiis, 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 onty 2 or 3 on a 

 peduncle. 

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



S. lineatus, 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. S. longi, p. 272 



ff. Spikelets rusty brown. 



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

 gg. Spikelets on individual peduncles. 



S. criophorunij 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. 

 Elcocharis pygmcea Torrey, Ann. Lye. N. Y. III. 313. 1836. — Willis 68. 



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

 Keller and BroAvn, 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. — Pt. Pleasant, St. Albans (L), Ship Bottom (L), Beach Haven 

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



