48 
A. trachycaulum var. pilosiglume n. var, 
Planta viridis. Glumae glumellaeque exteriores pubescentes. Glum- 
ella exterior aristata, arista glumella saepissime longior. Vaginae glabrae. 
Plant green. Empty glumes and lemma pubescent, the latter with 
an awn generally longer than its body. Sheaths glabrous. 
Specimen in the National Herbarium of Canada: British Columbia 
— No. 108309, Victoria, Vancouver island, June 14, 1914 (type!) (M. 0. 
Malte ), 
A. trachycaulum var. hirsutum n. var. 
Planta viridis. Glumae glumellaeque exteriores pubescentes. Glum- 
ella exterior aristata, arista glumella brevior vel subaequalis. Vaginae 
inferiores pubescentes. 
Plant green. Empty glumes and lemma pubescent, the latter with 
an awn varying from much shorter than to subequal to its body. Lower 
sheaths (and also upper side of lower blades) pubescent. 
Specimen in the National Herbarium of Canada: British Columbia 
- — No. 88698, Beacon hill, Victoria, Vancouver island, July 16, 1913 (type!) 
(J. Macoun). 
LITERATUKE CITED 
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2. Hitchcock, A. S.: “New Species of Grasses from the United States”; Proc. Biol. Soc. 
Washington, vol. 41, pp. 157-163 (1928). 
3. Holmberg, O. R.: Skandinaviens Flora, pt. 2, Stockholm, 1926. 
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Vetensk. — Akad. Handl., tredje ser, bd. 5, No. 1 (Stockholm, 1927). 
5. Kirk, L. E.: “The Improvement of Western Rye Grass, A gropyron tenerum Vasey”; 
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10. Link, J. H. F.: Hort. Reg. Bot. Berol., 1833. 
11. Malte, M. O.: “Breeding Methods in Forage Plants”; Sci. Agriculture, vol. I (Garden- 
vale, Quebec, 1921). 
12. “Commercial Bent Grasses (Agrostis) in Canada”; National Museum of Canada, 
Ann. Rept. 1926, pp. 105-126 (Ottawa, 1928). 
13. Pease, A. S., and Moore, A. H.: “Agropyron Caninum and Its North American Allies”; 
Rhodora, vol. 12, pp. 61-77 (Boston, Mass., 1910). 
14. Peto, F. H.: “Cytological Studies in the Genus Agropyron”; Can. Jour, of Research, 
vol. 3, pp. 428-448 (Ottawa, 1930). 
15. Rydberg, P. A.: Studies on the Rocky Mountain Flora XIX, Bui. Torr. Bot. Club, 
vol. 36, pp. 531-541 (New York, 1909). 
16. Scribner, F. Lamson, and Smith, J. F.: “Native and Introduced Species of the Genera 
Hordeum and Agropyron”; U.S. Dept. Agr., Div. Agrost., Bull. 4, pp. 23-36 (Wash- 
ington, 1897). 
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vol. 12, pp. 47-89 (Cambridge, 1922). 
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Nordeuropas kuster”; Svensk Bot. Tidskr., vol. 19, pp, 263-288 (Stockholm, 1925). 
