276 North American Cyperacea. 
C. vegetus, Willd., sp. 1. 283? ; VahU emmi. 2. p. 326 ? ; Pursh,fi. 
1. p. 51; Muhl.! gram. p. 25; Elliott, sk. 1. p. 65. 
Culm 2 — 4 feet high, the lower part with the sides convex. Leaves 4 
lines wide, scabrous on the margin towards the summit. Umbel about 
5-rayed ; the longer rays 2 — 3 inches in length ; partial rays very short, 
each bearing a head of 10 — 15 spikelets. Involucre much longer than 
the umbel. Ochreee bifid. Sjnkelets 3 — 4 lines long, and 2 lines wide, 
somewhat ancipital. Scales closely imbricated, greenish white, 3-nerved. 
Stam,ens always solitary. Style 3-cleft. Nut brown, very narrow, 
gradually tapering to a sharp point, the short pedicel swollen into a kind 
ofbulb. 
Hab. Ponds and ditches. Wilmington, North Carolina, 
Mr. Curtis;! South Carohna and Georgia; ElUottr Muhlen- 
berg!; East Florida, Dr. Baldwin! 
Obs. This species greatly resembles C. virens, but it can 
be distinguished by its smooth, obtusely triangular culm, and 
long-pointed nut with a remarkable cellular bulbous base. 
It is probable that our plant is a distinct species from the C. 
vegetus of Vahl and Willdenow. 
f tf Sjnkelets few, linear, loosely flowered, somewhat convex, 
inserted in aii irregular manner towards the svmmit of the 
rays; nut nearly as long as the scales. 
30. CyPERUS SCHWEINITZII. 
Culm triquetrous, with scabrous angles ; umbel simple ; rays 
elongated ; involucre 3 — 5-leaved ; spikelets 6 — 7, alternate and 
approximate, somewhat appressed lanceolate, 6 — S-flowered, 
with a setaceous bract at the base of each ; scales ovate, acuminate, 
mucronate, keeled ; rachis margined with the narrow interior 
scales; style 8-cleft to the base; nut triquetrous, ovate, acute. 
C. altemiflorus, Schioeinitz! in Long'' s 2nd. exped. append. 2. p. 381, 
(not of jR. Brovyn.) 
