1892.] NEW YORK ACADEMY OF SCIENCES. 83 



36. Scirpus lineatus, Michx. 



Scirpus lineatus, Michx., Fl. Bor. Am., i, 32 (1803). 



Trichophorum lineatum, Pers., Syn.. i, 69 (1805). 



Scirpus penduhis, Mubl., Gram., 44 (1817). 



Isolepis lineata, R. and S., Syst., ii, 117 (1817). 



Scirjius hrizoides,V^\\\A.. ex Link, Jalirb., iii, 89 (1820). 



Eriophorum lineatum, Benth. and Hook., Gen. PI., iii, 1052 (1883). 



Scirpus Drummondii, Stend., Cyp., 318 (1855). 



In swamps. Southern Ontario to Georgia, west to Minnesota, 

 Kansas, and Texas. Also in Oregon: Waldo and Grant's Pass 

 (T. Howell). 



RY^CHOSPORA, Valil, Enum., ii, 229 (1806). 



Dr. Gray's revision of the North American species of Byncho- 

 spora and Ceratoschoenus, published in Ann. N. Y. Lye. Nat. Hist., 

 iii, 363-372, included in Dr. Torrey's Monograph of the N. A. 

 Cyperacete, supplementary to his monograph printed in earlier pages 

 of the same volume, recognized 29 species. Drs. Torrey and Gray 

 always regarded the genus Pi^ilocarya as valid, and 3 species were 

 recognized in the monograph above mentioned, making in all 32 

 species of the three genera. In the following enumeration all are 

 regarded as belonging to Byneho.'ipo'ra, in this following the views 

 of Mr. C. B. Clarke, who has favored me, in his usual kind manner, 

 with an abstract of his arrangement of the North American species, 

 on which the present paper is based. The relation of Dichromena, 

 Michx., to the group is exceedingly close, and its species have been 

 included in Rynchospora by 0. Boeckeler, but I follow Mr. Clarke 

 in keeping it up. 



Of the 60 species here recognized 16 are Mexican, West Indian, 

 and South American, only so far as is now known, there being thus 

 44 species in the United States and Canada. 



I have followed Vahl's original spelling of the generic nai]je, 

 which has by subsequent authors usually been written Rlnjncho- 

 ■ spora. 



I. Subgenus HAPLOSTYLIS, Benth. 



Style entire or only shortly bifid, never cleft to tlie middle. 



* Culm monocephalous. 



1. Ryncliospora Mexicaiia (Liebm.). 



Haphstylis Mexicanu, Liebm., Mex. Halvg., 61 (1849). 

 Rynchospora Mexicana, Steud., Cyp., 144 (1855). 



Oaxaca, Mex. (Liebmann); near Guadalahaja, Mex. (Pringle, 



2628). 



2. Rynchospora globosa, R. and S. 



Rynchospora glohosa, R. and S., Syst., ii, 89 (1817). 

 Mexico (Liebmann). [Cuba, Wright, 3403.] 



