4 THE BOTANICAL MAGAZINE. [vol. xxiv. No. 276. 



other for control. At the same time I took some diseased 

 leaves of Aster scaher bearing the teleuto-spores and kept them 

 in moist condition in order to let the spores germinate. Soon 

 the germination took place and the production of sporidia was 

 observed. On the 13th of November 1907, I fastened a leaf 

 with germinating spores on a slender bamboo stick and hung 

 it on the pine seedling in the flower-pot, so as to secure infec- 

 tion by the falling sporidia. On April 1908, I have found on 

 the infected pine seedling, the formation of spermogonium and 

 a week later Aecidium. The control plant remained unchanged 

 and the result was very striking. 



Conclusions. 



I believe from the foregoing experiments, that the relation of 

 these two forms of fungi, i,e, Peridermium Pini-densiflorae found 

 on the leaves of Pitius densi flora and Coleosporium on the leaves 

 of Aster scaher (considered by Professor P. Hennings to be 

 identical with Col. Sonchi Ley.)* has been completely proved 

 and the genetic connection between them established, so it be- 

 comes necessary to alter the scientific name of this species some- 

 what. 



I think it very logical to name the fungus Coleosporium 

 Pini-Asteris Orishimo, with the following diagnosis. 



Coleosporium Pini-Asteris Orisimo. 



Spermogonium, isolated or in rows, of a brown colour, im- 

 mersed, depressed cone-shaped, 0,2-2,5 mm. high, 0,1-0,2 mm. 

 wide; spermatia ovate or spherical, 1— 1,5// x 1// ; aecidium found 

 in rows and tooth like, 0,6—1,4 mm. high, 0,5—1,5 mm. long, 

 0,3-1 mm. broad, cells of psedoperidia irregularly polygonal, 

 colourless, 38-65 // long, 26-37 // broad ; aecidiospores oval, 

 oblong or somewhat polygonal, of an orange colour, 22,5—35// 

 long, 14—22,5// broad, in average 32,5x22//, exospore consist- 

 ing of minute rod like structures, 1-2 // in thickness ; ured-sori 

 oval, or circular, sometimes irregular in form, of an orange 

 colour, appearing on the under surface of the leaves, forming 



* P. Hennings, Fungi Japonici. Bot. Jahrb. XXVIII. S. 262. 



