Hikatsuka: Studies on the Flax Kust II 



From above tables we can find that tlie teleutospores of Melampsora lini- 

 perd.i (KÖKN.) Palm on Linuiii usitatissiinum L,. from different localities arc 

 quite similar, the majority beinjf 6r.2 to y})-^ ," i'l length and 9.6 to 15. 2 // 

 in width. 



VI. Nomenclature of the Flax Rust Fungus. 



The discovery of Alelampsora parasitic on the species of Linuni dates back 

 to the beginning of the 19th century, when Persoon described it in 1801 as 

 Undo miniata Pkrs. var. Lini Pi-'Rs. in his Synopsis methodica fiingorum, p. 

 216. Since then many mycologists have found the fungus not only parasitic 

 on Linum catharticuin L. and L. usitatlssitiiuiii L., but also on several other 

 species oi Linum, and have given it various different names as mentioned below: — 

 {•redo Litii Schum., U. polymorplia Stkauss var. Lini Strauss, U. Lini DC, 

 Caeovia Lini Link, C. Lini Schlecht., Xyloma Lini Ehrend., Eiysibe Lini 

 Wallr., I^cythea Lini Berk , Podocystis Lini Fr., etc. In 1843, the genus 

 Melampsora was established b)- I.ouls Castagne*^ on I^Ielanipsora Euphorbiae 

 Cast, as the type species, but, the binomial Alelampsora Lini was first used by 

 J. H. Leveille'^ in 1847. Prior to it, in 18 18, C. G. EiiREXUERf;^' described 

 the teleuto-stage of the present fungus, under the name of Xyloma Lini Khrei^b. , 

 and we must therefore regard Alelampsora parasitic on Linum as Melampsora 

 Lini (Ehrenb.) Lev. 



In 1865, F. KoRxrcKE'" found a clear distinction between Melampsora of 

 the cultivated flax {Linum usitatissiinum L.) and that of the wild species of 

 Linum, and regarded it as a variety of Melampsora Lini Tul. naming it Me- 

 lampsora Lini Tul. var. liniperda Köknicke. According to his record, the 

 seedlings of Linum i/sitatissinum var. leucocarpum, the seeds of which he ob- 

 tained from the Botanic Garden of Copenhagen, were severely infected by Me' 

 lampsora Lini Tul. var. liniperda Kornicke, while none of the wild species of 

 Linum in that neighborhood was attacked by it. Then, in 1869, L. Fuckel"'* 



i) Obserb. myr. II, p. 18 (1843). 



1) Ann. Sei. nat. S4r. 3, VIII, p. 376 (1S47). 



3) Sylvae Myc. Berr>l. p. 27 (iGio). 



4) Land- u. Forstw. Zeit. Preussen (^1065), p. 42 (1065). 

 5} Symb. Myc. p. 44 (1869). 



