34 



The most isolated as to relationship of the North American species, differing from 

 all others in its hairy caryopsis and its prolongation of the rachilla villous only 

 near the summit. In habit and appearance it resembles some of the European 

 species of the Section Epigeos. 



^^ Leaf -blades strongly involute. 

 t Culms and usually almost filiform leaf-blades not rigid, plant not strongly cwspitose. 



31. CAL AMAGROSTIS LAXIFLORA Kearney, sp. n. C. neglecta gracilis Scribu. ; 



Coult. Bot. Gaz. 11, 175 (1886), not C. gracilis Seenus. 

 A small, nearly glabrous species of pale color and soft texture, with slender creeping 

 rootstocks, short (4 cm. or less), erect innovations, strict culms, involute leaf 

 blades and small, rather open and llexuous panicles. Culms 2.5 to 3.5 dm. high, 

 slender, with a few short, loose, thin, marcesceut sheaths at base; internodes 

 usually 3, the uppermost hually exceeding its sheath, the others apparently 

 shorter than their sheaths. Sheaths open toward summit, thin but rather firm, 

 glabrous. Ligule about 3 mm. long, truncate, thin but rather firm, nearly gla- 

 brous. Blades 5 to 13 (mostly about 10) cm. long, 2 to 3 mm. wide, strongly 

 involute from the l)ase to the filiform tip, erect or nearly so, slightly scabrous on 

 the margins and nerves on the up})er surface. Panicle 1.5 to 7 cm. long, 1 to 2 

 cm. wide, ovate to oblong-lanceolate, acutish, erect, strongly flexuous, rather 

 open and loosely flowered, straw-color tinged with pale purple; raehis slender, 

 strongly flexuous, glabrous l)elow, sparsely and minutely hispiduluus above, the 

 internodes comparativaly elongated, the lowest about 1 em. long; branches 

 slender, strongly flexuous, rather loosely flowered, somewhat sparsely hispidu- 

 lous, the lower primary branches mostly in 3's, somewhat spreading (sometimes 

 nearly 45 degrees), the longest 1.5 to 2.5 cm. long. Spikelets about 3 mm. long. 

 Emptj^ glumes lanceolate to ovate-lanceolate, short acuminate, rather strongly 

 keeled, minutely hispidulous on the keel, otherwise glabrous, thin, firm, mem- 

 branous, the first slightly longer. Flowering glume 2.5 to 3 mm. long, slightly 

 shorter than the second empty glume, ovate, narrowed to the truncate apex, 

 minutely 4-dentate, hyaline, nearly glabrous; awn attached one-third to two- 

 fifths above the base, equaling or very slightly exceeding the glume, very slender, 

 erect, straight. Palea about three-fifths as long as the flowering glume, ovate 

 oblong, minutely bidentate, glabrous. Anthers 2 mm. long. Callus-hairs not 

 copius, soft, bright white, slightly shorter than to equaliug the flowering glume. 

 Prolongation of the rachilla, with its rather sparse hairs about equaling the 

 longer ones of the callus. 



Tyjte specimen in the United States National Herbarium collected in meadows on 

 the East Fork of the Yellowstone Kiver, Yellowstone Park, by Frank Tweedy 

 (.582), in August, 1885. 



Related to ('. neglecta, but readily distinguished by its smoothness, pale color, more 

 open and flexuous, loosely flowered panicle and longer callus hairs. Separated 

 from C. neglecta in the National Herbarium as a variety by Dr. Vasey. 



32. Calamagrostis neglecta (Ehrh.) Gaertn. ; Gaertn. Mey. und Scherb. Fl. Wet- 

 terau 1:94 (1799). Arundo neglecta Ehrh. Beitr. 6:84, 137 (1791). A. siricta 

 Timm.; Siemss. Meckleni). Mag. 2:235; Schrad. Fl. Germ. 215(1806). ^(7^- 

 mugrostis siricta Koel. Deser. Gram. 105 (1802). Ikyeuxia neglecta Kuutli Pev. 

 Gram. 1:76 (1835). Calamagrostis coarctata Hook. Fl. Bor. Am. 2:240 (1839). 

 C. lapponica A. Gray, Proc. Am. Acad. 6:78 (1866) in part. Deyeuxia neglecta 

 brerifolia A'asey, Macoun Cat. Can. PI. 4:206 (1888). 



Labrador to Alaska, south to northern Maine, Wisconsin, Colorado, and Oregon; 

 northern Europe and northern Asia. 



Type sp<'cimen collected at Upsala, Sweden. 



Sl'EC»iENS EXAMINED. — ArcHc scacoust : (Richardson). Labrador: (Morison 401 in 

 Herb. Hook.); Ungava Bay, (Turner); Independent, (Waghoruo), 1892; Eagle 

 River, (Waghorm-), 1893. Newfoundland : Long Point, (Waghorne), 1892; Bay of 

 Islands, (Waghorne 55), 1896; Holton. (Waghorne), 1892. Nora Scotia: Amherst 



