. The Canadian field-naturalist. , 1950] The Canadian Field-Naturalist 185 1942 c. A new genus of the Myce- tozoa. Mycologia 34: 593-594. 1943. Notes on the Myeetozoa. VII. Mycologia 35 : 363-380. • 1944. The Myeetozoa of North Amer- ica. Mineola, Lister, Arthur. 1925. A Monograph of the Myeetozoa. Third edition, revised by Gulielma Lister. London. Macbride, Thomas H., and G. W. Martin. 1934. The Myxomycetes. New York. Mains, E. B., L. 0. Overholts, and Rene Po- merleau. 1939. Myxomycetes. In Mycological Society of America — Fungi collected at the foray, August 1938. Mycologi
. The Canadian field-naturalist. , 1950] The Canadian Field-Naturalist 185 1942 c. A new genus of the Myce- tozoa. Mycologia 34: 593-594. 1943. Notes on the Myeetozoa. VII. Mycologia 35 : 363-380. • 1944. The Myeetozoa of North Amer- ica. Mineola, Lister, Arthur. 1925. A Monograph of the Myeetozoa. Third edition, revised by Gulielma Lister. London. Macbride, Thomas H., and G. W. Martin. 1934. The Myxomycetes. New York. Mains, E. B., L. 0. Overholts, and Rene Po- merleau. 1939. Myxomycetes. In Mycological Society of America — Fungi collected at the foray, August 1938. Mycologia 31 : 728-729. Martin, G. W. 1942. Taxonomic notes on the Myxomycetes. Mycologia 34: 696-704. Massee, George. 1892. A Monograph of Myxo- gastres. London. Moore, C. L. 1910. The Myxomycetes of Pictou County. Trans. Inst. Sci. 12 : 165-206. Wehmeyer, Lewis E. 1935. Myxomycetes. In Contributions to a study of the fung- ous flora of Nova Scotia. I. Papers Mich. Acad. Sci. 20 : 238-241. 1950. Myxomycetes. In The Fungi of New Brunswick, Nova Scotia, and Prince Edward Island. Ottawa, pp. 10-13. NOTES AND OBSERVATIONS Effect on trees of extremes of climate in southern Alberta. — The growing season in this region is characterized by a low rainfall and late spring frosts. Although much of the 10-15 in. annual precipitation is in June, this month is frequently subject to strong west- erly winds which are both hot and dry, and thus involve a very great saturation defici- ency. Whereas the growing season may commence early due to the scanty snow cover and cloudless spring days, the clear nights following cold fronts allow severe frosts to occur in May. The dry winds may have spectacular effects on planted vegetation. After a day in early June, 1943, when the wind averaged 40 m. and the temperature 85° F., the foliage of a lilac bush (Syringa) 7 feet in height,. Fig. 1. Alberta white spruce transplants with crop of cones developed one year aiter planting at S\iiiield, Alta.
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