78 MEMOIRS OF THE NE\\' YORK BOTANICAL GARDEN". 



Spanish Basin, June 28 andjuly i, 1897, Rydbcrg cf- Besscv, J7/4, 

 jy/j; Belt River Canon, 1886, R. S. Williams, ^jj.^ ; West Gal- 

 latin, 1883, Scribner, J2I ; Spanish Basin, 1896, Rydberg, jioj. 

 Yellowstone Park : 1886, Tzcccdy, /j. 



Carex concinna R. Br. Frankl. Journ. 763 [Man. R. M. 376: 111. 

 Fl. i: 332]. 



In wet places among rocks up to an altitude of 2500 m. 

 Montana: Sun River, 1887,7?. S. Williams, 6^g. 

 Yellowstone Lake : 1885, T-zveedy, 6jj. 



* Carex pseudoscirpoidea. 



Dioecious, growing in large clumps ; leaves mostly basal ; the 

 earliest reduced to brown scales, the rest 1-2 dm. long and fully 

 3 mm. wide, somewhat carinate, strongh' veined, scabrous, especially 

 on the margins, long-acuminate; culm 1-3 dm. high, seldom higher, 

 sharply 3-angled, striate, scabrous, generally over i mm. in diam- 

 eter; fertile spike oblong-cylindric, 1-2.5 C'"^- loi^g? i^i fruit fully 

 5 mm. in diameter, subtended a short distance below by a lanceolate- 

 subulate bract, which is green with dark brown margins ; scales 

 broadly ovate, dark brownish purple, with a thin erose margin, fully 

 equalling the perig3mia ; these 3 mm. long, bluntly triangular, ob- 

 ovate, slightly beaked, greenish, and densely hirsute ; styles 3 ; 

 sterile spike oblanceolate-club-shaped, about 2 dm. long and 5-7 mm. 

 in its greatest diameter ; scales similar, but somewhat lighter in color ; 

 anthers linear, about 3 mm. long. 



This has been confounded with the eastern C. scirpoidca Michx., 

 which is a much more slender plant, the leaves seldom over 2 mm. 

 wide, the culm less than i mm. in diameter, the fertile spike in fruit 

 seldom over 3 mm. in diameter, and the scales shorter than the fully 

 developed perigynia and generally with a greenish midrib. 



C. scirfoidca ranges from the mountains of Xew England to 

 Greenland and throughout subarctic America to Behring Strait, 

 while in the Rockies its place is taken by C. pseudoscirpoidea , ex- 

 tending from southern Alaska to Wyoming and Utah. The Cali- 

 fornian plant maybe still different. The following specimens belong 

 here : 



Montana: Lone Mountain, Gallatin Co., 1886, Tzvecdy, lo^j; 

 Boulder Creek (altitude 2800 m.), 1887,75.- ^ogo» 1888, 7?. 6". 

 Williams, 46^: Little Belt Pass, 1896, Rvdberg, 3314: Spanish 

 Basin, j'o<57,- Yogo Bald}-, 57/2; Tiger Butte, 1883, Scribner, 306. 



Yellowstone Park: 1885 (altitude 3000 m.), Tzcecdy, 63^. 



