27 



longer usually one-fourth shorter than (sometimes nearly equaling) the lloxver- 

 ing glume. Prolongation of the rachilla, with its sparse hairs not equaling or 

 barely equaling the longer hairs of the callus. 



Maine; western New York. 



Type specimen in the United States National Herbarium, collected on high ground, 

 in woods of pine, rock-oak, hickory, etc., on Thacher's Pinnacle, Dauby, near 

 Ithaca, N. Y., by W. R. Dudley, August 1, 1884. 



Specimexs examined. — Maine: ^Vet clifts, Boarstoue Mountain, Elliottsville, Pisca- 

 taquis County; altitude 547 meters (Fernald 427), 189.5. Xew York: Thachers 

 Pinnacle (Dudley, Coville), 1884-1888. 



Intermediate between C. canadensis and C. portcri. From the former it differs in its 

 sheaths usually bearded at junction with the blade; contracted and dense 

 panicle; stouter, bent and exserted awn; longer palea; less copious, shorter, 

 stiller callus hairs; and shorter hairs to the prolongation of the rachilla. From 

 C. porieri it is distinguished by its laser habit; more slender culms ; usually 

 denser panicle; smaller spikelets; smoother and thinner empty glumes; less 

 scabrous and thinner dowering glume; shorter awn, flexuous or but slightly 

 twisted below; shorter palea; and longer more copious callus hairs. Indicated 

 by Dudley in the United States National Herbarium as a variety of C. canadensis. 



B. Awn straight or nearly so, included, callus-hairs usually not much shorter than the 



flowering glume. 

 a. Panicle open, the lower rays wide-spreading, leaf -blades flat or nearly so, callus-hairs 

 copious, nealy or quite equaling the glume. 



22. Calamagrostis langsdorffii Triu. Gram. Unid., 225, t. 4, f. 10 (1824). Arundo 

 langsdorffii Triu. 1. c, not Link. ? Calamagrostis scabra Presl. Kel. Haenk. 1 : 234 

 (1828)! C.hirtigluma Steud. Syu. PI. Gram. 188 (1855). C. oregonensis Buckl., 

 Proc. Acad. Phila. (1862)92 (1863). C. co I u mb ien s is 'Nntt.; A. Gray, Proc. Acad. 

 Phila. (1862) 334 (1863). Deyeuxia halleriana Vasey Descr. Cat. Grasses U. S. 50 

 (1865), not C. halleriana DC. 



Greenland to Alaska, south in the mountains to North Carolina, Michigan, New 

 Mexico, and California; northern Europe and northern Asia. 



Type specimen collected at Tobolsk, Siberia. 



Specimens ex amisev.— Greenland : Godthaab, (Meehau 75), 1892. Labrador: Ungava 

 Bay, (Turner 670); Ungava Bay, (Spreadborough 13197 G. S. C), 1896; Venison 

 Tickle, (Waghorne 13352 G. S. C), 1891; Chateau, (.1. A. Allen 20), 1882; Inde- 

 pendent, (\Vaghorne 50), 1892; Turners Head, Hamilton Inlet, (\Vagh()rne 52), 

 1892; Hamilton River, (Low 6082 H.G.S.C), 1894. yewfoundland: St. Johus, 

 (Robinson and Schrenk 204), 1894 ; Shoal Point, (Waghorne), 1895. Nora Scotia: 

 Magdelan Islands (McKay 17381 H. G. S. C), 1878. Cape Breton : Whycocogmah, 

 (Macouu 17380 H. G. S. C), 1883. Xew Brunswick: Restigouche River, (Brittaiu 

 17383 H. G. S. C), 1888. Quebec : Grand Etang, Gaspe, (Macoun 26, 17377 H. G. S. 

 C.),1882; Mount Albert, (Macoun 17378 H. G. S. C), 1882; Table Topped Moun- 

 tain, Gaspe, altitude 912 meters, (J. A. Allen), 1887. Maine: Northeast Harbor, 

 Mount Desert, (T. G. White), 1891; Mount Saddleback, Franklin County, alti- 

 tude 1,064 meters. (Fernald), 1894. Xew Hampshire: Mount Willey, Ethans 

 Pond (C E. Faxon), 1877; White Mountains, (Nuttall, Oakes, Tuckerman); 

 Mouu't Washington, (W. Boott, Pringle, Garber, Allen), 1855-1878. Vermont: 

 Mount Manstield, (Pringle) 1876; Willoughby, (Rusby), 1892. Xew York : Mount 

 Mackay, (Britton), 1889; Mount Mclntyre, altitude, 1. 126 meters, (Brittou), 1892; 

 Mount' Marcy, altitude 1,368 meters, (Britton), 1892. Xorth Carolina: Roane 

 Mountain, (Curtis). Xortheast Territory: Lake Mistassini, (J. M. Macoun 17361 

 H G S C), 1885; Fort George, James Bay, (J. M. Macoun 17382), 1887. Ontario: 

 Thunder Bay, Lake Superior, (Macoun 160, 17384 H. G. S. C), 1869. Michigan: 

 Isle Royale, (Porter), 1865. Saskatchewan: Saskatchewan River, (Douglas). 

 Assiniboia: Bear Lake, (Douglas? 120). Colorado: Clear Lake, Georgetown, 



