800 MINNESOTA BOTANICAL STUDIES. 



CYPERUS L. Sp. PI. 44. 1753. 



Cyperus difformis L. 



Common about taro ponds, in Pauoa valley, near Honolulu. 

 Not before recorded from the Islands. 

 April to June (2003). 



Cyperus hawaiieusis Mann, Proc. Am. Acad. 7:208. 1867. 

 Ex descriptio. 

 On rocks at 1400 feet elevation, at the Nuuanu Pali, where a 

 few plants were collected. This species seems to have been 

 collected only by Mann and Brigham, and by Wawra. The 

 type is Mann and Brigham No. 246, from "the mountains of 

 Hawaii, Maui, and Kauai." 



Cyperus hypochlorus Hillebr. PI. Haw. Is. 468. 1888. Ex 

 descriptio. 



The plant referred to this species is not uncommon in Hana- 

 pepe valley, Kauai, in wet places near the river bank, and on 

 grassy slopes. A large, handsome species. 



June 29 (2466). 



Cyperus laevigatas L. Mant. 2: 179. 1771. 



Common about Honolulu in wet ground. Specimens were 

 collected at Waikiki. and at Salt Lake. 



March to May (1959). 



Cyperus peuuatus Lam. Tabl. Encycl. 1: 144. 1791. 



Common in marshes about Pearl city, Oahu, and also in moist 

 places on slopes in the Hanapepe valley, Kauai. 



June 10 (2407); original locality, "Java." 



Cyperus polystachys Rottb. Descr. et Icones. 39. 1773. 



Common on grassy slopes on Oahu, up to the edge of the 

 forest. Noticed also near Pearl city, in low ground near the 

 coast. It was plentiful also on Kauai. 



March to August (1948). 



Cyperus rotuudus L. Sp. PI. 45. 1753. 



Collected in cultivated ground near Waikiki, outside of Hono- 

 lulu. It was introduced about 1850. 



May 9 (2286); original locality, "India." 



