258 I^orth American Cyperacea. 
one-leaved; scales linear-oblong, loosely imbricate, rather acute, 
membranaceous, 3-nerved on the keel ; stamen 1 ; style two- 
cleft; nut oblong-obovate, much compressed, puncticulate. 
C. tenellus, Linn. sup. p. 103 ? ; Vahl, enum. 2. p. 305? 
C. minimus ? Nutt. ! gen. 1. p. 35, not of Thunh. ; Bart. ! prodr.fl. 
Phil. 1. p. 26. 
Culm triquetrous, scarcely as thick as a bristle, about 4 inches high- 
Involucre of one erect setaceous leaf, about an inch long, and a minute 
bract 2 — 3 lines in length. Spikelet half an inch long, and one line broad, 
much compressed, rather loosely imbricated. iJac/n's slightly margined . 
Style filiform, cleft half way down. Nut brown, dull, obtuse, with a 
minute point. 
Hab. Monmouth county, New Jersey, Dr. Isaac Cleaver ! 
Obs. This interesting species appears to be extremely rare, 
as it has not been found since its discovery in New Jersey by 
the late Dr. Cleaver of Philadelphia. Whether our plant is 
the C. tenellus of Linnaeus and Vahl, (which seems to be 
the C. minimus of Thunberg) cannot be certainly deter- 
mined from the imperfect descriptions of those authors. It is 
probable, however, that our species is distinct, and should it 
prove to be so, I propose to call it C. Cleaverii, it honor of its 
discoverer. C. minimus is described by Vahl as bearing from 
one to three oblong spikelets, with ovate acute scales, while 
our plant has a solitary lanceolate-linear spikelet and linear- 
oblong scales. 
b. Culm triangular ; umbel simple or compound. 
t SpiJcelets alternate, or disposed towards the extremity of the 
rays in a distichoiis or spiciform manner, the lowest ones often 
compound. 
