NO. 7 TWO NEW SEDGES MACKENZIE 3 



the body, minutely hyaline-tipped, obliquely cut or in age very 

 shallowly bidentate; achenes lenticular, with short oblong face, 

 2.75 mm. long, 1.5 mm. wide; style slender, straight, not enlarged 

 at base; stigmas two. 



Among the specimens cited by me in describing Carex neomexi- 

 cana 1 are two specimens collected in Arizona by Dr. H. H. Rusby. 

 Further study of these specimens has convinced me that while they 

 have a strong resemblance to that species they represent an entirely 

 distinct plant. In Carex neomexicana the perigynium beak is deeply 

 bidentate and strongly serrulate, and the rootstock is short-creeping. 

 In Dr. Rusby's specimens the perigynium beak is obliquely cut, or in 

 age very shallowly bidentate, and minutely serrulate or nearly 

 smooth on the margins, while the culms are densely cespitose. The 

 northern species described by me as Carex brevisquama 2 is closely 

 related but is distinguished by its smaller perigynia, less cespitose 

 culms, and more strongly reddish brown tinged scales. 



In addition to Dr. Rusby's specimens collected in 1883 in Yavapai 

 County, Arizona, nos. 859 (type, herb. N. Y. Bot. Gard.) and 855, 

 Mr. E. O. Wooton has collected the same species at Van Patten's 

 Camp, in the Organ Mountains, Dona Ana County, New Mexico 

 (May 14, 1899). 



1 Bull. Torrey Club 34 : 154. 1907. 



2 An earlier name for this northern plant is Carex vallicola Dewey. The 

 type, which I have seen recently, is a young plant with little developed per- 

 igynia. In mature plants the bracts and scales are much less prominent than 

 they appear in the type. 



