340 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Figure 691.— Distribution of 

 Agrostis perennans. 



about 0.5 mm long. 



Agrostis perennans var. elata (Pursh) Hitchc. Differing in 

 the more slender and elongate culms, often decumbent at base, but 

 particularly in the crowding of the spikelets toward the ends of the 

 branchlets, causing them to droop somewhat. 91 —Marshes and 

 bogs mostly near the coast, New Jersey to Mississippi. 



29. Agrostis oregonensis Vasey. Oregon 

 redtop. (Fig. 692.) Culms 60 to 90 cm tall; 

 blades 2 to 4 mm wide; panicle oblong, 10 to 

 30 cm long, open, the branches verticillate, 

 rather stiff and ascending, numerous in the 

 lower whorls, the longer 5 to 10 cm long, 

 branching above the middle; glumes 2.5 to 3 

 mm long; lemma 1.5 mm long, awnless; palea 

 01 — Marshes, bogs, and wet meadows, Mon- 

 tana to British Columbia, south to Wyoming and California (fig. 693). 



30. Agrostis canina L. Velvet 

 bent. (Fig. 694.) Culms tufted, 

 30 to 50 cm tall; blades mostly 

 short and 

 narrow, 

 those of the 

 culm 3 to 6 

 cm long, 

 usually not 

 more than 

 2 mm wide ; 



panicle loose and spreading, 

 mostly 5 to 10 cm long; glumes 

 equal, acute, 2 mm long, the lower 

 minutely scabrous on the keel; 

 lemma a little shorter than the 

 glumes, awned about the middle, 

 the awn exserted, bent; callus minutely hairy; palea minute. 01 — 



Figure 693.— Distribution of 

 Agrostis oregonensis. 



Figure 692.— Agrostis oregonensis. Panicle, X 1; 

 glumes and floret, X 5. (Hitchcock 23524, Oreg.) 



FX? 



Meadows and open ground, Newfound 

 land to Quebec, south to Delaware 

 and Michigan; possibly native north- 

 ward but introduced in the United 

 States (fig. 695); Europe. Sometimes 

 cultivated for putting greens. 



31. Agrostis borealis Hartm. (Fig. ^ 

 696.) Culms tufted, 20 to 40 cm tall, W 

 or, in alpine or high northern plants, Wfa 

 dwarf; leaves mostly basal, the blades 

 5 to 10 cm long, 1 to 3 mm wide; pan- 

 icle pyramidal, 5 to 15 cm long, the 

 lower branches whorled and spreading; 

 glumes 2.5 to 3 mm long, acute ; lemma 

 a little shorter than the glumes, awned, ^jg^ 

 the awn usually bent and exserted; x 



palea obsolete or nearly so. % — *™ 

 Rocky slopes and moist banks at high 

 latitudes and altitudes, Newfoundland and Greenland to Alaska, south 

 to the high mountains of New England and New York; West \ lrginia; 

 summit of Roan Mountain, N.C. (fig. 697) ; northern Europe. 



Panicle, X 1; 

 glumes and floret, X 5. (Commons 99, Del.) 



