47 
106849, Edmonton, July 26, 1917; No. 108035, Jasper, July 31, 1917; 
Nos. 106913, 106914, Beaverlodge, July 18, 1921 (M. O. Malte); Nos. 
92012, 92013, Salt River region, Aug. 20, 1916 (Charles Camsell); British 
Columbia — No. 108344, Invermere, July 31, 1915; Nos. 106783, 106778, 
Vernon, July 12, 1918 (M. O. Malte); Yukon Territory — No. 106842, 
Whitehorse rapids, Yukon river, Sept. 2, 1902 (J. Macoun); No. 106842, 
Dawson, Aug. 10, 1916 ( M . O. Malte). 
A. trachycaulum var. caerulescens n. var. 
Planta glauca. Glumella exterior glabra vel scabriuscula, arista 
glumella Iongiore instructa. Vaginae glabrae. 
Glaucous. Lemma glabrous or finely scabrous, bearing an awn longer 
than its body. Sheaths glabrous. 
Specimens in the National Herbarium of Canada: Alberta — No. 
108310, Banff, Aug. 5, 1915 (M. O. Malte); British Columbia — No. 
107855, Comox, Vancouver island, July 22, 1915 (type!) (M. O. Malte.) 
A. trachycaulum var. ciliatum (Seribn. & Sm.) n. comb. 
A. Richardsoni Schrad. var. ciliatum Seribn. & Sm., U.S. Dept. Agr., 
Div. Agrost. Bui. 4, 29 (1897). 
A. caninum var. pubescens Seribn. & Sm., U.S. Dept. Agr., Div. 
Agrost., Bui. 4, 29 (1897). 
A. caninum (L.) Beauv. var. unilaterale (Cassidy) Vasey f. ciliatum 
(Seribn. & Sm.) Pease & Moore, Rhodora, 12, 76 (1910). 
A. caninum (L.) Beauv. f. pubescens (Seribn. & Sm.) Pease & Moore, 
Rhodora, 12, 71 (1910). 
Plant green. Lemma glabrous, bearing an awn longer than its body. 
At least the lower sheaths pubescent. 
Of specimens in the National Herbarium of Canada, the following 
may be cited: Quebec — No. 85659, Beaver meadow, Hull, June 30, 1911 
(J. Macoun); Ontario — No. 119245, Lemieux island, Ottawa, Aug. 9, 
1923 (M. O. Malte); No. 30299, near Shannonville, June 14, 1866 (J. 
Macouri); Manitoba — No. 106686, Brandon, Aug. 2, 1918 (M. O. Malte); 
Saskatchewan — No. 12962, Prince Albert, July 13, 1896 (J. Macoun); 
Alberta — No. 18595, Crowsnest pass, July 29, 1897 (J. Macoun); No. 
107813, Edmonton, July 26, 1918 (M. O. Malte); British Columbia— 
No. 30296, Golden, July 10, 1885 (J. Macoun ); No. 101852, Little Shuswap 
lake, June 18, 1889 (J. Macoun) 1 . 
A. trachycaulum var. glaucum (Pease & Moore) n. comb. 
A. caninum (L.) Beauv. f. glaucum Pease & Moore, Rhodora 12, 71 
(1910). 
Plant glaucous. Lemma glabrous or finely scabrous, bearing an awn 
longer than its body. At least the lower sheaths pubescent. 
Specimens in the National Herbarium of Canada: Nova Scotia — No. 
111101, Great Bras d’Or, Kidstone island, Aug. 28, 1920 (M. L. Fernald 
and B, Long); Alberta — No. 107776, Edmonton, July 25, 1916; No. 
108465, Edmonton, July 25, 1921 (M. O. Malte). 
'This is the specimen upon which A. caninum (L.) Beauv. var. pubescens Seribn. & Sm. is based. It is an 
extreme form of their A. Ridtardsoni Schrad. var. ciliatum with both sheaths and blades densely pubescent. Accord- 
ing to the inscription on the label it was collected at "Chase Lake s. of Kamloops.” According to information 
secured from the late Senator the Hon. Hewitt Bostock, Chase lake is the same as what is now officially known as 
Little Shuswap lake. Scribner and Smith give the locality as “Little Sheisemp Lake," which is obviously an 
orthographic error. 
35922—4 
