270 North American Cyperacecb. 
Hab. In Louisiana, Jussieu. 
Obs. With this plant I am unacquainted. 
23. Cyperus Baldwinii. 
Culm obtusely triangular ; involucre 6 — 9-leaved; umbel a( 
6 — 12 rays ; heads globose ; spikelets narrow-lanceolate, com- 
pressed, acute, 5 — 8-flowered, spreading; scales ovate-lanceo- 
late, acute, appressed ; interior scales conspicuous, hyaline ; 
nut ob ovate. 
Mariscus echinatus, Elliott, sk. 1. p. 75, t. 3. f. 1. (excl. syn.) 
Cyperus globosus, Baldw.! Mss. (not oi Allioni.) 
Culm 1 — 2 feet high, smooth, somewhat tumid at the base. Leaves 
shorter than the culm, 2 — 3 lines wide, scabrous on the margin. Rays 
of the umbel somewhat erect, 1 — 3 inches long. Ochrees mucronate. 
Involucre more than twice as long as the umbel. Heads 6 — 8 lines in 
diameter, depressed, globose, formed of about 40 aggregated spikelets, 
which spread horizontally but are not refracted. Spikelets 3 — 4 lines 
long, attenuated to a sharp point. Rachis broadly winged with the per- 
sistent inner scales. Scales membranaceous, somewhat scarious on the 
margin ; the two lowest short, ovate, and empty. Stamens 3. Style 3- 
parted. Nut narrowed at the base, half the length of the scale. 
Hab. In cultivated lands ; very common in the Southern 
States. South Carolina and Georgia, Dr. Baldwin! and Elliott; 
Middle Florida, Dr. Chapman!; New Orleans, Dr. Ingalls! 
Obs. This plant differs from the C. ovularis, to which Mr. 
Elliott referred it, in its more numerous and looser heads, 
and compressed, many-flowered spikelets. In many respect- 
it resembles C. Grayii. 
24. Cyperus compressus, Lhiiu 
Umbel simple (rarely compound,) or wanting ; rays spread- 
ing ; spikelets in a loose head, or aggregated in a somewhat 
digitate manner, lanceolate, somewhat convex and ancipital, 
many-(12 — 40) flowered ; rachis winged with the interior scales ; 
scales ovate, acuminate, carinate, indistinctly nerved ; nut obo- 
vate, triquetrous, polished ; root fibrous. 
