1892.] NEW YORK ACADEMY OF SCIENCES. 15 



several points for me, and kindly allowed me to look over his manu- 

 script of the genus as a whole, prepared for his forthcoming volume 

 on the Cyperaceae 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, 

 f Spike solitary, terminal. 



1. Scirptis nanus, Spreng. 



Scirpiis namis, Spreng., Pug., i, 4 (1815). 



Scirpus pitsillus, Valil, Enum., il, 24(i (1806)? 



Scirpus jiarviilns, R. & S., Syst., ii, 124 (1817). 



Scirpus capillaceus, Ell., iJot. S. C, i, 75 (181b'). not Michx. 



Eleocharis pijgmcea, Torr., Ann. Lye, iii, 313 (1836). 



ChcEtocyperus membranaceus, Buckl., Proc. Acad. Nat. Sci. Pliila., 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. 



Var. anacliaetus (Torr.). 



Eleocharis pygmrea, var. anachieta, Torr., Ann. Lye, iii, 441 (1836). 

 Scirjius leptos, Sauv., Fl. Cub., 176 (1873). 

 Jsolepis 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 panci/lorus, Lightf., Fl. Scot., 1078 (1777). 

 Scirpus Bieotlnjron, 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 pumilus, Vahl. 



Scirpus pumilus, Vahl, Enum., ii, 243 (1806). 

 Isolepis pumita, 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; alsA 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. 



