26 



Mountains of New England; near tlie Great Lakes, Ontario to Minnesota. 



Type specimen in the United States National Herbarium collected at Fond du Lac, 

 Minn., by F. F. Wood, July 23, 1889. 



Specimens examined.— ^^dc Hampshire: Mount Willard (C.E.Faxon 9), 1875. Ver- 

 mont: Mount Mansfield (Pringle), 1876. Ontario: Flat Eock Portage, Lake 

 Nipigon (Macouu 54, 17392 H. G. S.C), 1884. Xew York: Racket Lake (Leg- 

 gett), 1857. Michhjan: Isle Royale (Porter), 1865. Minnesota: Fond du Lac 

 (F. F. Wood), 1889; Guntlint Lake (F. F. Wood), 1891. 



The specimens from the region of the Great Lakes are mostly very distinct, having 

 taller culms, longer leaves, and longer, narrower, denser panicles than typical 

 C. hreriseta. Were it not for the occurrence of a few intergrading forms they would 

 be regarded as representing a perfectly distinct species. The specimen from 

 Guntlint Lake and that from Mount Willard, however, agree in habit, aspect, 

 and size with C. hreviseta, differing only in the Horal characters above enu- 

 merated. The plant from Lake Nipigon has the jiauicle of the Nova Scotia 

 specimens of C. hreviseta. but its Horal characters refer it to the variety. 



20. Calamagrostis porteri A. Gray, Proc. Am. Acad. 6: 79 (1862). Deycuxia porteri 

 Yasey, Descr. Cat. (hasses U. S., 51 (1885). 



New York and I'ennsylvania. 



Type specimen collected at Pulpit Rocks, Huntingdon County, Pa., by T. C. Porter, 

 in August, 1862. 



Specimens examined.— JVf/c York: Sullivan Hill, Chemung County (T. F. Lucy 

 1185), 1895. Pennsylvania: Alexandria, Barre Station, Warriors Ridge, Pulpit 

 Rocks, and Porter Township, Huntingdon County (Porter), 1862-1882. 



21. C AL AM A. GROSTIS NEMORALIS Kearney, sp.n. C. porteri Yasej: Dudley 

 Cayuga Fl. 125 (1886), not A. Gray. 



Slightly glaucous, apparently not ca-spitose, of soft texture, with slender, creeping 

 rootstocks, tall (2.5 to 4 dm.) erect innovations, and densely flowered, pale- 

 colored panicles. Culms 10 to 15 dm. high, erect, rather slender, rather closely 

 invested by a few long thin marcescent sheaths at base; internodes 5, all but 

 the lowest linally considerably exceeding their sheaths, the uppermost nearly 

 as long as both sheath and blade. Sheaths closely embracing tlie culm to their 

 summits, rather firm, usually bearded at junction with the blade with short white 

 tomentose pubescence, rather strongly scabrous on the edges, elsewhere glaljrous, 

 or nearly so. Ligule 3 to 5 mm. long, truncate, thin, rather strongly scabrous 

 on the back. Blades (lower and of innovations) 2 to 3.5 dm. long (uppermost), 

 1 to 1.5 dm. long (all), 3 to B mm. wide, Hat, rather thin, minutely but strongly 

 scabrous on the margins and Itoth surfaces, somewhat glaucous above, bright 

 green beneath, lax, the lower erect, the upper spreading, the uppermost hori- 

 zontal or even somewhat rellexed. Panicle 1 to 1.5 dm. long, 1.5 to 2.5 cm. wide, 

 oblong-lanceolate, sharp-acuminate, contracted, erect, slightly llexuous; rachis 

 rather slender, somewhat llexuous, hispidulous above, nearly glabrous toward 

 base, its lowest internode 1.5 to 2 cm. long; branches slender, slightly flexuous, 

 hispidulous, densely flowered, nearly erect, or the lower somewhat spreading, 

 lower primary branches in 5's, the longest 3 to 5 cm. long. Spikelets 3.5 to 4 nun. 

 long. Empty glumes lanceolate or oblong lanceolate, acuminate, rounded on the 

 back or rather strongly keeled, hispidulous on the keels, elsewhere glabrous, the 

 first slightly longer. Flowering glume, usually about e([ualiug the second 

 empty glume, ovate oblong, obscurely 4-dentato or almost entire, thin but rather 

 firm, scabrous-punctate on the back; awn attached about one-fifth above the 

 base, slightly exceeding the glume, stout, minutely scabrous, bent near the 

 middle, the lower part somewhat twisted, the ni)per part divergent at a small 

 angle and slightly exserted. Palea abcmt three-fourths (sometimes four-fifths) 

 as long as the flowering glume, ovate-oblong, denticulate (occasionally slightly 

 bidentate), glabrous. Callus hairs not copious, rather stifl", bright white, the 



