'2 4i «— JIS tCt ^j ^n o Pf % 



distinguished two varieties in it, var. major and var. minor, the former variety 

 parasitic on IJitmn iisitatissiiiimn I,., tlic latter on Liiiimt catharticiim L. At 

 last, in 19 1 o, B. Palm" elevated JiTiiaiiipsora Lint var. liniperda to a specific 

 rank and called it Aletainpsora liniperda (Kokn.) 1'ai.m. 



Melanipsovn liniperda (Kökx.) Palm 



in Svensk Bot. Tidskr. IV, p. (5), 1910; Hiratsuka in Jour. Soc. Agric. & 

 Forestr. Sapporo, XVIII, p. 106, 1926; Jap. Jour. Bot. Ill, p. 293, 1927; Lind, 

 Danish Funi^'i, p. 292, 1913; Sacc. Syll. Fun^'. XXIII, p. 833. 



Synonyms. 



Jilc/ainpsora Lint Tul. var. liniperda Körnicke in Land- u. Forstvv. Zeit. 

 Preussen (1865), p- 4-, J865; Sacc. Syll. Fung. VII, p. 588; Wint. in Pilze 

 Deutschi. I, p.242, 1 88 1. 



AT. Lint Tul. var. major Fuckel, Synib. Myc. p. 44, 1S69. 



Type host. Linnm nsitatissimiim L. 



Distribution. Work!- wide. 



VII. The Life History of che Causal Fungus. 



The life history of the causal fungus, Melampsora liniperda (Körn.) Palm 

 is a complicated one consisting of four stages, all of which are passed on the 

 flax as hcst. It was Arthur '"\ who first in 1906 after many unsuccessful 

 trials discovered the spermogonia and aecidia of JMelampsora on the common 

 fla.x. In 1906, he obtained a large collection of flax straw from Prof. H. L. 

 BoLLEY of North Dakota, a most important state for flax culture in North 

 America. Germination experiments with these materials had been all vain until 

 one made in the last day of April on cultivated flax, dug from under a snow 

 bank. This specimen showed strong germination of the teleutospores, and on 

 May 4 the sporidia were sown on Lintim Leivissi and Larix laricina, and on 

 the following day on Tsnga canadensis and Ariscuma tripliyllum. Then, on May 

 16, spermogonia began to appear on Linnm Lezoisii and on May 21, aecidia. 



1) Svensk Bot. Tidskr. IV, p. (5), (igio). 



2) \.C. 



