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



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. % — 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 

 about 0.5 mm long. <2[ —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, 



Figure 691.— Distribution of 

 Agrostis perennans. 



Figure 692.— Agrostis oregonensis 

 glumes and floret, X 5. 



(Hitchcock 23524, Oreg.) 



usually not 



more than Figure 693.— Distribution of 

 2 mm wide ■ Agrostis oregonensis. 



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. % 

 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, 

 or, in alpine or high northern plants, 

 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, 

 the awn usually bent and exserted; 

 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 Virginia; 

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



Figure 694.— Agrostis canina. Panicle, X 1; 

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



