112 CONTEIBUnONS FROM THE NATIONAL HEEBAEIUM. 



Range: British America to New Mexico and Kansas. 

 'New Mexico: Clayton; Elida; Arroyo Ranch; Nara Visa. Sandy soil, in the Upper 

 Sonoran Zone. 



6. Cyperus uniflorus Torr. & Hook. Ann. Lye. N. Y. 3: 431. 1836. 

 Type locality: Texas. 



Range: Western Texas and southern New Mexico. 



New Mexico: Organ Mountains; sands south of Melrose. Dry soil, in the Upper 

 Sonoran Zone. 



7. Cyperus speciosus Vahl, Enum. PI. 2: 364. 1806. 

 Cyperus michauxianus Schult. Mant. 2: 123. 1824. 

 Type locality: "Habitat in Virginia." 



Range : Throughout most of the United States. 

 New Mexico: Mangas Springs; Roswell. Wet ground. 



7a. Cyperus speciosus squarrosus Britton, Bull. Torrey Club 13: 214. 1886. 



Type locality: "New Mexico." 



This differs from the species in having the scales spreading to recurved, and red- 

 dish. Reported from New Mexico by Dr. N. L. Britton. Based on Fendler's 870, 

 which probably came from near Santa Fe. 



8. Cyperus esculentus L. Sp. PI. 45. 1753. Nut grass. 

 Cyperus phymatodes Muhl. Descr. Gram. 23. 1817. 



Type locality: "Habitat Monspelii, inque Italia, Oriente." 



Range: British America and southward throughout the United States and tropical 

 America; also in the Old World. 



New Mexico: Las Vegas; Albuquerque; Hillsboro; San Luis Mountains; Mesilla 

 Valley; Belen; White Mountains; Gray; Roswell. Wet ground, in the Lower and 

 Upper Sonoran zones. 



9. Cyperus erythrorhizos Muhl. Descr, Gram. 20. 1817. 

 Type locality: Pennsylvania. 



Range : Throughout most of the United States. 



New Mexico: Mesilla Valley. Wet ground, in the Lower Sonoran Zone. 



10. Cyperus sphacelatus Rottb. Descr. PI. 26. 1786. 

 Type locality: Surinam. 



Range: In the southern and southwestern United States and in tropical America. 

 New Mexico: Organ Mountains (Wooton 620). Upper Sonoran Zone. 



2. CLADIXJM R. Br. Saw grass. 



Coarse leafy perennial with cylindric stems about a meter high; spikelets small, in 

 large, much branched, terminal panicles; glumes overlapping, the lower empfy, the 

 middle with unisexual flowers, the uppermost with perfect flowers; perianth none; 

 stamens 2 or 3; styles not persistent; achenes ovoid to globose, smooth or longitudinally 

 ridged, 



1. Cladium jamaicense Crantz, Inst. Herb. 1: 362. 1766. 

 Cladium effusum Torr. Ann. Lye. N. Y. 3: 374. 1836. 

 Type locality: Jamaica. 



Range: Virginia and Florida to Texas and New Mexico; also in the West Indies. 

 New Mexico: Roswell. In shallow water. 



3. ELEOCHARIS R, Br. Spike rush. 



Annual or perennial scapose herbs, 15 to 30 cm. high or more, the leaves reduced to 

 basal sheaths, the solitary terminal spikes without subtending bracts; stems cylindric, 



