174 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



31. Carex lanuginosa Michx., FL. Bor. Amer. 2: 175. 1803. 

 Apache County to Mohave and Yavapai Counties, up to 8,700 feet, 



rather common. New Brunswick to British Columbia, south to 

 Tennessee, Texas, Arizona, and California. 



32. Carex bella L. H. Bailey, Bot. Gaz. 17: 152. 1892. 



Apache, Navajo, Coconino, and Graham Counties, 9,000 to 11,000 

 feet. Colorado, Utah, New Mexico, and Arizona. 



This is the most frequently collected Carex in Arizona, not because 

 it is the most common species, but because of its striking beauty, 

 hence its specific name bella. 



33. Carex albo-nigra Mackenz. in Rydb., FL Rocky Mount. 137. 



1917. 

 San Francisco Peaks (Coconino County) up to 12,000 feet, common. 

 Alberta to Washington, south to northern Arizona and California. 



34. Carex chalciolepis Holm, Amer. Jour. Sci. ser. 4, 16: 28, 29. 1903. 

 San Francisco Peaks (Coconino County) about 11,000 feet, common. 



Wyoming, Colorado, Utah, and northern Arizona. 



This species and C. albo-nigra are often found growing together, and 

 specimens of both sometimes are mounted on the same sheet. They 

 are easily differentiated, as the heads of C. albo-nigra are nearly black, 

 whereas the heads of C. chalciolepis are brownish copper-colored. 



35. Carex nebraskensis Dewey, Amer. Jour. Sci. ser. 2, 18: 102. 



1854. 

 Apache, Coconino, and Mohave Counties, up to 11,500 feet, rather 

 common. South Dakota to British Columbia, south to Kansas, New 

 Mexico, Arizona, and California. 



36. Carex senta Boott, Illus. Carex 174. 1867. 



Apache, Coconino, Maricopa, and Cochise Counties, 2,000 feet or 

 higher. Arizona and California . 



37. Carex ultra L. H. Bailey, Amer. Acad. Arts and Sci. Proc. 22: 



83. 1886. 

 Apache and Cochise Counties, type from southern Arizona (Lemmon 

 2901, 2902) . New Mexico and southern Arizona. 



A related species, Carex spissa L. H. Bailey, has been accredited to Arizona by 

 Mackenzie on the basis of a specimen collected by Pringle. This particular sheet 

 is probably mislabeled. There are three different handwritings on the sheet, and 

 the word "Arizona" has evidently been added later. The specimen was probably 

 collected near San Diego, Calif., where C. spissa is common. At any rate, no other 

 collection of C. spissa in Arizona has been detected. 



38. Carex hystricina Muhl. ex Willd., Sp. PL 4: 282. 1805. 

 Apache, Navajo, Coconino, and Maricopa Counties, up to about 



6,000 feet, rather common. New Brunswick to Washington, south to 

 Virginia, Texas, Arizona, and California. 



39. Carex thurberi Dewey in Torr., U. S. and Mex. Bound. Bot 



232. 1859. 



Coconino, Gila, Cochise, Santa Cruz, and Pima Counties, 5,000 to 

 6,000 feet, common, especially in the southern counties. Arizona to 

 Guatemala; West Indies. 



Related to C. hystricina, but that species does not seem to extend 

 farther south in Arizona than Maricopa County. 



