366 POACE^. 



rays capillary in twos, bearing the spikelets near the tips. Spike- 

 lets with the awns usually protruding one-third of their length; 

 empty glumes thinner than the floral glume, ovate-lanceolate, first 

 3.5 mm. long, 1-nerved, second 4. 5 mm. long, 3-nerved, the lateral 

 nerves short and sometimes obscure or wanting; florets 4 or more 

 mm. long, overlapping for five-sixths of their length, sparingly 

 silky-hairy at the base; fioral glume ovate, 5-nerved, eroded or 

 toothed, awn starting about 1 mm. above the base; palea as long as 

 its ghime, or longer or shorter. Grain not grooved, free. 



Mt. Washington, D. C. Eaton; Massachusetts, Beal 81; ISTew 

 Jersey, 8crihner for U. S. Dept. Agricul. 460; New York, Clarh 

 1302 from Clinton; Michigan Isle Royale, Rohlins 75^; Colorado, 

 Brandegee. 



New England, Michigan, to the south and west; northern 

 Europe and Asia. 



4. D. atropurpurea (Wahl.) Sclieele, Flora (27) 1: 56 (1844). 

 Aim atropurpurea Wahl. Fl. Lapp. 37 (1812). D. lalifolia 

 Vasey, Cat. Gr. U. S. 53 (1885). 



A smooth perennial, 20-40 cm. high. Leaves 3-4; sheaths 

 as long as the internodes, shorter or longer; oblique at the throat; 

 ligule obtuse, 2-3 mm. long; blades flat, those of the sterile 

 shoots 4-15 cm. Jong, those of the culms 2-6 cm. long, 3-6 mm. 

 wide. Panicle simple, open, more or less exserted, 5-11 cm. long, 

 rays in pairs, spreading, the longest 4-8 cm. long, bearing 5-10 

 spikelets near the apex. Spikelets mostly pedicellate, a few subses- 

 sile. often purple ; empty glumes compressed, subequal, first shorter, 

 linear-lanceolate, 1-nerved, 4.7-6 mm. long, second ovate-lanceo- 

 late, 3-nerved, 5-6 mm. long; florets overlapping for one- third to 

 one-half their length; rachilla above the upper floret about 0.6 mm. 

 long; floral glume 2.3-2.7 mm. long, the silky hairs reaching to 

 the middle or above, the stout awn attached a little above the mid- 

 dle, 2.5-4.5 mm. long, broadly oval, truncate, silky, irregularly 3-4- 

 toothed, obscurely 5-nerved ; palea as long as its glume, or a little 

 shorter, truncate or irregularly toothed. 



Labrador, A. A. Allen; White Mountains, Tuckerman, OaJces, 

 C. E. Faxon; British Columbia, Macoun. 



