1892. ] NEW YORK ACADEMY OF SCIENCES. 15 
several points for me, and kindly allowed me to look over bis manu- 
script of the genus as a whole, prepared for his forthcoming volume 
on the Cyperacez of the world. We are not altogether agreed on 
the limits of species, Mr. Clarke being disposed to treat some of 
those which I think are distinct as varieties. 
* Spike solitary, or sometimes 2, sessile, terminal, or lateral. 
+ Spike solitary, terminal. 
1. Scirpus nanus, Spreng. 
Scirpus nanus, Spreng., Pug., i, 4 (1815). 
Scirpus pusillus, Vahl, Enum., ii, 246 (1806) ? 
Scirpus parvulus, R. & S., Syst., ii, 124 (1817). 
Scirpus capillaceus, Ell., Bot. S. C., i, 75 (1816), not Michx. 
Eleocharis pygmea, Torr., Ann. Lye., iii, 313 (1836). 
Cheetocyperus membranaceus, Buckl., Proc, Acad. Nat. Sci. Phila., 1862, 10. 
On salt marshes, Cape Breton Island to Florida and Texas. 
Apparently also in California. Saline soil, near Onondaga, N. Y. 
(Dudley). Sea-coast of Europe. i 
Var. anacheetus (Torr.). 
Eleocharis pygmea, var. anacheta, Torr., Ann. Lye., iii, 441 (1836). 
Scirpus leptos, Sauv., Fl. Cub., 176 (1873). 
Isolepis leptos, Steud., Cyp., 91 (1855). 
Louisiana (Hale); New Orleans (Drummond, 409); Cuba 
(Wright); Mexico (Berlandier, 130, in part); Albuquerque, New 
Mexico (Bigelow). 
2. Scirpus pauciflorus, Lightf. 
Scirpus pauciflorus, Lightf., Fl. Scot., 1078 (1777). 
Scirpus Beothyron, Ehrh., Phyt., No. 31 (1780). 
Eleocharis pauciflora, Link, Hort. Ber., i, 284 (1827). 
In wet ground, Anticosti to western New York,.western Penn- 
sylvania, Ontario, Illinois, Minnesota, Manitoba, British Columbia, 
and in the Rocky Mountains south to Colorado, and to California. 
Also in Europe. 
3. Scirpus pumillus, Vahl. 
Scirpus pumilus, Vahl, Enum., ii, 243 (1806). 
Isolepis pumila, R. & S., Syst., ii, 106 (1817). 
Isolepis oligantha, C. A. Meyer, Cyp. Nov. 3, t. 1 (1830). 
Rocky Mountains (Hall and Harbour, 583, in Herb. Calcutta 
and Boissier, fide C. B. Clarke; also in Herb. Gray); Morley, 
British Columbia, Rocky Mountains (Macoun, 44). Europe. 
The species is distinguished from the following by its shorter 
spike, narrower basal bracts not nearly as much imbricated, creeping 
rootstocks, and less sharply triangular achenium with no bristles. 
