22 CLASS III. ORDER III. 



SciRPus PLANiFOLius. Mulil. Flat leaved Club rush. 



Culm triangular; leaves linear, flat, about equal to 

 the culm; spike terminal, oblong, compressed, shorter 

 than its bractes. 



A small species in wet grounds, the radical leaves as high as 

 the culm. Bractes cuspidate, the outer one longer than the 

 spike. — May, June. 



SciRPUs c^sPiTosus. L. Scaly Club rush. 



Culm rounded, sheathed at base with rudiments 

 of leaves; spike terminal, the two outer glumes as 

 long as the spike. 



Var. (?. callosus. The two outer glumes obtuse and fleshy at 

 the tips. 



A low plant with very small spikes. The truncated glumes 

 with fleshy whitish tips, had led me to consider this a distinct 

 species, until I received similar specimens from Europe. — On the 

 White mountains. — July. — Perennial. 



§§ Subgenus Scikfus. Seed surrounded with bristles — style 

 filiform, deciduous. 



SciRPus Americanus. JPers. Three sided Club rush. 



Culm nearly naked, triangular ; spikes few, lateral, 

 conglomerate sessile ; glumes round-ovate, mucronate. 

 Syn. SciRPUs triqueter. Mx. 



Culm two or four feet high, sharply three cornered with con- 

 cave sides. It resembles S. triqueter of Europe, very much, but 

 the spikes are fewer and farther from the top. — Salt marshes. — • 

 July. — Perennial. 

 SciRPUS DERiLis. Pursli. WcaTc stemmed Club rush. 



Culm round, striated ; spikes few, lateral, crowded, 

 sessile, short-ovate. 



About a foot high ; glumes broad, carinate. — Wet ground and 

 edges of ponds. — August. — Perennial. 



