25 



primary branch 3 to 7 cm. long; spikelets usually 5 (sometimes only 4) mm. long; 

 flowering glume one-fourth to one-fifth shorter than the shorter empty glume. 



British Columbia, Washington, and Idaho. 



Type specimen in the United States National Herbarium, eollectod at Farmiugtou 

 Landing, Lake Cceur d'Alene, Idaho, by Saudberg, Heller, and McDougal (630), 

 1892. 



Specimens exxmiskd.— Idaho: Farmingtou Landing (Sandberg, 630), 1892; Talouse 

 country and Lake Cieur d'Alene (G. B. Alton 41), 1892; Latah County (Piper 

 1761), 1893; Cieur d'Alene Mission (Henderson 2832), 1894; Lake/Waha, Nez 

 Perces County, altitude 60S to 1,064 meters (Heller), 1896. British Cohimhia: 

 Sicamous (Macoun 37, 17439 H. G. S. C), 1889; Revelstoke (Macoun 24, 17437 

 H. G. S. C), 1890. Washington : Cascade Mountains (G. R. Vasey), 1889; (Brande- 

 gee 1171), 1883 ; Peshastiu, altitude 608 to 912 meters (Sandberg and Leiberg), 1893. 



\^Not cwsjyitose, or hut slight! tj so; culms not rigid, leaf-lJades usually nearly flat — 



Eastern species. 



19. Calamagrostis breviseta (A. Gray) Scribn., Mem. Torr. Club 5: 41 (1894). 

 C. si/lratica hreriseta A. Gray, Man., .582 (1848). C. pickeringii A. Gray, Man., ed. 2 

 547 (18.56). Deyeuxia pickeringii Vasey, Descr. Cat. Grasses U. S., 51 (1885). 



Nova Scotia and Cape Breton to the mountains of New England and northern New 

 York. 



Type specimen collected on the alpine tops of the White Mountains, New Hampshire. 



Specimens examined.— Caj;*- Breton: Arichat, Isle Madame (J. A. Allen 17)^^ 1882. 

 Xora Scotia: Louisbourg (Macouu 41,17423 H. G. S. C.),1883. Vermont: (Prin- 

 gle) 1877. Xew Hampshire: White Mountains (Oakes, Tuckerman) ; Echo Lake, 

 Francouia (Chickering) ; Mount Monroe (C. E. Faxon 16, 17), 1877; Mount Wash- 

 ington (C. E. Faxon), 1885. Massachusetts : Naggett's Pond, Audover (J. Robin- 

 son), 1879. Xew York: Avalanche Lake (Torrey?). 



The Cape Breton and Nova Scotia specimens are more leafy and liave a narrower, 

 denser, stricter, darker-colored panicle than the White Mountain i>laut. 



CALAMAGROSTIS BREVISETA DEBILIS Kearney, var. n. 



Of softer texture; culms sometimes only 2 dm. high, very slender, less rigid, the 



uppermost internodes much elongated, usually twice as long as both sheath and 



blade ; leaf-blades thinner and rather lax ; panicle small (mostly 4 to 10 cm. long, 



about 1 cm wide), contracted, almost spiciform, somewhat flexuous; empty 



glumes narrower and somewhat thinner. 

 Newfoundland to Massachusetts. 

 Type specimen in tlie United States National Herliarium crdlected on the banks of 



the Exploits River, near the mouth of Badger Brook, Newfoundland, by B. L. 



Robinson and H. Schrenk (205), August 13, 1894. 

 Specimens examined. — Xewfoundland: Exploits River (Robinson and Schrenk 205), 



1894; Chimney Cove (Waghorne 8), 1895; Grand Lake (Waghorne 41,42), 1896. 



Xeic Hampshire: Ethaus Pond, Mount Willey (Pringle, E. Faxon), 1877-79. 



Massachusetts: Essex County (Conant), 1880. 



CALAMAGROSTIS BREVISETA LACUSTRIS Kearney, var. n. C. lapponica 

 A. Gray, Proe. Am. Acad., 6: 78 (1862) in part. 



Sometimes stoloniferous; rootstock stouter; culms usually taller (5 to 10 dm. high) ; 

 sheaths occasionally somewhat bearded at summit; leaf-blades usually longer 

 and somewhat involute; panicle often longer (maximum length 1.5 dm.) ; empty 

 glumes usually more scabrous on tlie keel; flowering glume often somewhat 

 thinner; awn attached one-fourth to one-third above the base; palea noticeably 

 shorterthan the flowering glume, almost hyaline; callus-hairs more copious, the 

 longer three-foiirths to six-sevenths as long as tiie fb)wering glume; prolonga- 

 tion of the rachilla with its hairs slightly shorter than to eiiualing the flowering 

 glume. 



