Fig. 34. — Coniothyrium Fuckelii on Rose Stems. 



a, Shoot of rose showing a number of spots caused by the rose canker fungus, x 2 ; 

 b, upper part of a showing minute fissures in bark, x 4; c, portion of b showing 

 fissures and fungus bodies, x 20 ; d, section through bark with eight fungus bodies, 



x 20 ; e, a single fungus body, x 50 ; f, same as e with a portion cut away, x 50 ; 

 g, portion of fungus body showing spore bearers and spores, x 200; h, basidia and 

 spores, x 500; i, ripe spores, x 750; j, germinating spores, x 1,000 ; k, rose twig 

 showing result of fungus attack, long splits in the bark, x 1 ; l, a fissure in the 

 bark, x 2 ; m, cross-section through same, x 2 ; n, portion of a shoot showing 

 parenchym growth from the edges of the crack, x 2 ; o, cross-section through 

 same, x 2 ; p, badly cankered shoot, x 4; q, cross-section through the same, x 4 ; 

 r, part of the cellus containing five fungus bodies, x 15; 



VOL. XXXIV. q 



