LAMSON-SCRIBNER AND MERRILL — GRASSES OF ALASKA. 61 



Calamagrostis atropurpurea Nash, Bull. N. Y. Hot. Gard. 2: 153. 1901, is a form 

 intermediate between ( 'alamagrostis canadensis and C. langsdorffii, differing from the 

 former in its shorter panicles and more scabrous plumes, and from the latter in its 

 smaller spikelets and less acute glumes. The following specimens are referred here: 

 Dawson, William* in 1899; and (doubtfully) 16 miles west of Nome City, Flett 1684. 

 C. perplexa Seribn." belongs here. 



7. Calamagrostis lapponica (Wahl.) Ilartm. Skand. Fl. 1: 46. 1820. 

 Arundo lapponica Wahl. Fl. Lapp. 27. 1812. 



A slender, glabrous perennial 30 to 100 cm. high, with narrow, often involute leaves 

 and dull brownish purple and contracted panicles 7 to 15 cm. long, interrupted below; 

 spikelets about 5 mm. long; glumes acute, minutely scabrous-pubescent; lemma 4 to 

 4.5 mm. long; awn rather stout, about equaling the lemma, slightly geniculate and 

 twisted. 



In damp soils, valley of the Koyukuk; also in northern Europe and Asia. 



Specimens examined: Dall River, 0. A. Piper in 1904. 



Reported from Dawson b (Williams in 1899), with the statement that the Alaskan 

 specimen exactly matches a specimen in the herbarium of Columbia University named 

 Arundo lapponica by Wahlenberg. It is also reported from Unalaska by Grisebaeh. c 



8. Calamagrostis neglecta (Ehrh.) Gaertn. in Gaertn. Mey. & Scherb. Fl. Wett. 1: 



94. 1799. 



Arundo neglecta Ehrh. Beitr. Naturk. 6: 84. 137. 1791. 



A slender, glabrous perennial 25 to 100 cm. high, of soft texture, with often numerous 

 innovations, strongly involute, often nearly filiform leaf blades and narrow, contracted 

 panicles 6 to 10 cm. long, of small spikelets; spikelets 2.5 to 3.5 mm. long; glumes not 

 strongly keeled, glabrous except on the scabrous keels, thin-membranous; lemma 

 2.5 mm. long; awn about equaling the lemma, straight or slightly bent. 



In damp soils, valley of the Koyukuk, the Porcupine River, and the upper Yukon, 

 eastward to Labrador and southward to Maine, Colorado, and Oregon; also in northern 

 Europe and Asia. 



Specimens examined: Dall River, 0. A. Piper in 1904; Fort Yukon, Bates in 1889; 

 Porcupine River, Turner in 1891. 



9. Calamagrostis hyperborea Lange, Fl. Dan. 50: pi, S. 1880; Consp. Fl. Green- 



land. 160. 1880. 



A rigid, erect perennial 40 to 70 cm. high, with flat or involute leaves and densely 

 flowered, almost spike-like panicles 5 to 10 cm. long, usually somewhat interrupted 

 below; spikelets about 4 mm. long, the glumes firm, scabrous, usually tinged with 

 purple; lemma about 3.5 mm. long, punctate-scabrous, bearing a stout, nearly straight 

 awn on the back which about equals it in length. 



In damp soils, the Aleutian Islands to the upper Yukon, eastward to Greenland and 

 southward in the mountains to Vermont, Arizona, and California. 



Specimens examined: Yukon River, Dawson 97; Shumagin Islands, Trelease & 

 Saunders 2918, Saunders in 1899; Unalaska, Harrington in 1871-72. 



11. DESCHAMPSIA Beauv. 



Deschampsia Beauv. Ess. Agrost. 91. pi. 8.f. 3. 1812. 



Spikelets 2 or rarely 3-flowered; rachilla hairy, articulated above the glumes and 

 prolonged beyond the upper floret as a hairy bristle; glumes 2, subequal; lemmas 

 subhyaline, 4-nerved, bearing on the back a slender, usually twisted and geniculate 

 awn. Annual or perennial grasses with flat or convolute leaves and rather small 

 shining spikelets in terminal, narrow, or open panicles. 



«U. S. Dept. Agr. Div. Agrost. Circ. 30: 7. 1901. 

 b Nash, Bull. N. Y. Bot. Gard. 2: 154. 1901. 

 cLedeb.Fl.Ross. 4: 429. 1853. 



