1892.] NEW YORK ACADEMY OF SCIENCES. 77 



9. Scirpiis carinattis (H. & A.). 



Isolepis carinatun, H. & A., in Torr. Ann. Lye, iii, 349 (1836). 

 Scirpus cariimtus, A. Gray, Proc. Am. Acad., vii, 392 (1868). 

 Jsolepis koilolepis, Steud., Cyp., 318 (1855). 



In low grounds, Alabama, Mississippi, Louisiana, Texas, Arkan- 

 sas, and the Indian Territory to California. 



** Spikes several or numerous, capitate or urabelled, subtended by 

 1 or several involucral leaves. 



10. Scirpiis C I1 1)611 sis, Poepp. & Kunth. 



Scirpus Cubensis, Poepp. & Kunth, in Kunth, Enum., ii, 172 (1837). 

 Scirpiis ahlejtharns, Griseb., Cat. PI. Cub., 240 (lS6(i). 



Oxi/carytim Schoinhurijhldamnn, Nees in Mart. Fl. Bras., ii, Pars. I, 90 (1842). 

 Anosporum Cubense, Bceck., Linnsea, xxxvi, 413 (1870). 



In swamps, Louisiana (Carpenter); New Orleans (Hale); near 

 Mobile, Alabama (Mohr.). Also in the West Indies and eastern 

 South America, and in Africa. 



11. Scirpus jWexicaims, Clarke, ined. 



Scirpus cyperoides, Hemsley, Bot. Biol. Centr. Amer., iii, 461 (1885), not Spreng. 



S>st., i, 208 (1825). 

 Cyperus , S. Wats., Proc. Amer. Acad., xviii, 169. 



Mexico: San Luis Potosi (Schaffner. 566; Parrj^ and Palmer, 

 905); Flor de Maria, Mexico (Pringle, 3173;. 



12. Scirpus Potosinus, Clarke, ined. 



Moist banks of ravines, San Jose Pass, San Luis Potosi, Mex. 

 (Pringle, 3175, Coll. 1890, distributed as "Cyperus, near C. elegans, 

 Vahl") 



13. Scirpus Hallii, A. Gray. 



Scirpus Hallii, A. Gray, Addenda, Man. Ed. 2 (1863). 

 5. sttpiitus, var. Hallii, A. Gray, M'an. Ed. 5, 563 (1867). 



Massachusetts: Winchester (W. Boott ; Hitchings; Morong). 

 Illinois: Menard Co. (E. Hall). Florida: Indian River (Curtiss, 

 3118*). Missouri: St. Louis (Engelmann). Texas: (Wright; 

 Lindheimer. Colorado: (Greene). Mexico: Yera Cruz (Midler, 

 2153); San Luis Potosi (Schaffner, 571; 201). 



14. Scirpus detoilis, Pursh. 

 Scirpus debilis, Pursh, Fl. Am. Sept., i, 55 (1814) 



Maine: Harrison (Blake). New Hampshire: Plymouth (Mo- 

 rong); west to Minnesota, Lake Minnetonka (Seymour) ; south to 

 Georgia, Alabama, and Nebraska. 



Small forms of this species nun close to the next, l)ut the presence 

 of bristles in S. debilis, equalling or longer than the nut, is here 

 taken as distinctive. 



