264 North American CyjJeracecE. 



C. specioius, Vahl, enum. 2. p. 364 ; Emm. S; Scliult. 2. p. 218 ; 

 Pursh,fl. 1. p. 58; Ellioit, sk. 1. p. 72. 



Culm 2 — 4 feet high, rather acutely angled. Leaves 1 — 2 feet long, 

 4 — 6 lines wide, deeply channelled, somewhat glaucous underneath, 

 scabrous on the margin. Umbel about 8-rayed ; the primary rays 2^-3 

 inches long, and more distinctly alternate than in most other Cyperi. 

 Ochrece loose, obliquely truncate, terminating in two lanceolate points 

 nearly an inch long. Involucre foliaceous, a little longer than the 

 partial rays; the leaflets alternate like those of the rays. Sfikes 

 numerous, compound, with setaceous bractesc at the base. Spikelets 

 subulate. '^Stamens 3. Style 3-cleft. Nut 3-angled, compressed, 

 slightly incurved." — Elliott. 



Hab. In ditches and wet places, South CaroUna. 

 Elliott. Wihuington, North Carohna, Mr. Curtis!; Virginia, 

 Vahl; New Orleans, D). Ingalls!; Middle Florida, Dr. 

 Chapnan ! 



Obs. My specimens of this plant are too young to exhibit the 

 characters of the spikelet and fruit ; yet there can be little doubt 

 of its being the C. speciosus of Elliott, as it is the only native 

 species bearing conspicuous partial as well as general invo- 

 lucres. Vahl's plant, which was described from specimens 

 preserved in the Herbarium of the Jardin des Plantes in Paris, 

 may be distinct from ours. He describes the spikelets as 

 scarcely half an inch long, terete, 6-flowered, with linear scales. 



17. Cyperus repens, Elliott. 



Rhizoma creeping, tuberiferous ; umbel simple, 4 — 6-rayed ; 

 involucre much longer than the rays ; spikes distichous ; spikelets 

 10 — 14, approximated, somewhat spreading, 12 — 20-flower- 

 ed, Unear, compressed, obtuse ; scales oblong, rather acute, 

 slightly mucronate, the margin scarious ; nut oblong, triquetrous ; 

 style 3-cleft half-way down. 



C. repens, Elliott, sk. 1. p. 69 ; Schult. mant. 2. p. 112 ; Spreng. syst. 

 p. 224. 



C. phymatodes, Muhl. ! grain, p. 23; Torr. ! fl. 1. p. 62; Beck! 

 hot. p. 42 ; Chray ! Gram. &^ Cyp. part 1. no. 73; Link, jahrb. 3. p. 87. 

 (fide Schult. mant. 2. p. 117.) 



C. tuberosus, Pursh,fl. 1. p. 52. (excl. syn.) 



