74 Karl M. Wiegand and Arthur J. Eames 



[Avena (Tourn.) L.] 



[A. sativa L. Common Oat. 



The common oat occasionally springs up in waste places or where it has been 

 scattered from fodder, but it is not established. 



Native of Eurasia.] 



18. Arrhenatherum Beauv. 

 1. A. elatius (L.) Beauv. Oat Grass. 



Roadsides and fields, in good soils ; scarce. June. 



N. and s. of Slaterville Springs ; near McGowan Woods ; C. U. campus (D. in C. 

 U. Herb.!); Agricultural College greenhouses; Chi Psi grounds; Cayuga Heights 

 Road, grounds of Sigma Chi fraternity ; fairly abundant in Butler and Conquest. 



Escaped from cultivation: Newf. to Minn., southw. to Ga., Tenn., and Nebr. ; also 

 on the Pacific coast. Naturalized from Eu. 



19. Deschampsia Beauv. 

 a. Basal leaves setaceous, very numerous ; sheaths scabrous ; florets approximate ; 



flowering glumes scabrous, the twisted awn much exserted. 1. D. flexuosa 

 a. Basal leaves flat or involute, less numerous ; sheaths smooth ; florets distant ; 

 flowering glumes smooth, the straight awn scarcely exceeding the body. 



2. D. caespitosa 



1. D. flexuosa (L.) Trin. Hair Grass. 



Dry sandy, gravelly, or stony, noncalcareous or sometimes apparently calcareous, 

 sterile soils ; rare. June-July. 



Caroline Pinnacles (D. !) ; hillside s. of Brookton; cliffs n. of King Ferry (D.) ; 

 Utt Point (£>.!). 



Greenland and Newf. to Wis., southw. to N. J., N. C, and Tenn.; frequent on the 

 Coastal Plain. Found also in Eu. 



2. D. caespitosa (L.) Beauv. 



Marly meadows and limy shores; rare. July 10-Aug. 10. 



Spencer Lake (K. M. W ., A. J. E., & F. P. Metcalf) ; Cortland marl ponds {DA); 

 Farley Point (£>.); Utt Point (DA). 



Newf. to Alaska, southw. to n. N. J., 111., Minn., and in the mts. to N. C. and N. 

 Mex. ; apparently absent on the Atlantic Coastal Plain. Found also in Calif, and Eu. 



20. Ginannia Bub. 



1. G. lanata (L.) Hub. (See Rhodora 18:234. 1916. Holcus lanatus of Gray's 

 Man., ed. 7, and of Cayuga Fl.) Velvet Grass. 



Fields and roadsides, in rather damp rich soils; becoming frequent. June-Aug. 15. 



Field, Enfield Falls ; several places about C. U. campus and farm ; near Ringwood. 



N. S. to 111., southw. to N. C, Tenn., and 111.; also on the Pacific coast. Natural- 

 ized from Eu. 



21. Danthonia DC. 



a. Leaves mostly basal, short; the cauline leaves with blades 8-14 cm. long, those at 



the base forming a curly mass when dry ; culm terete ; panicle short and rather 



dense (open only at anthesis), 5-6 cm. long. 1. D. spicata 



a. Leaves more cauline, longer ; those on the stem with blades 15-30 cm. long, the 



basal ones not curly ; culm flattened ; panicle longer and more open, 7-9 cm. long. 



2. D. compressa 

 1. D. spicata (L.) Beauv. Wild Oat Grass. 



Dry sterile gravelly banks, hillsides, and old fields, mostly in acid soils, not found 

 on the clays and richer soils ; common. June-July 15. 



Newf. to N. Dak., southw. to N. C, La., and Tex., including the Coastal Plain. 



