546 THE FUNGI WHICH CAUSE PLANT DISEASE 



liypophyllous, numerous, 75-150 m; spores allantoid, continuous, 

 7-10 X 1.5-2 fi. On Carya. 



G. berberidis Cke. 



Hypophyllous; acervuli collected, numerous; spores ovoid, 

 5x3/1- On Barberry. 



G. tamarindi Hem. is on tamarinds, in Africa. 



G. canadense E. & E. 



Spots amphigenous, center pale, border brownish ; acervuli few, 



Fig. 368. — M. corticolum, on apple twig. After 

 Edgerton. 



180-200 m; spores ovate-oblong, hyaline, 10-14 x 3.5-4.5. 

 On white oak. 



Myxosporium Link (p. 538) 



Acervuli immersed or superficial, indefinite, pallid or reddish; 

 conidia ovate, hyaline or pale, conidiophores slender-cylindric. 



Some seventy species, some of which are important pathogens. 



In part=Gnomonia. See p. 274. 



M. valsoideum (Sacc.) All. on sycamore =Gnomonia veneta. 

 See p. 274. 



M. corticolum Edg. 



Acervuli erumpent, originating under several layers of cortex, 

 1-2 mm. in diameter, scattered over the diseased area; conidia 

 straight or curved, cylindric, very densely granular, 18-36 x 6-9 

 M, oozing out of the pores in white cirri; conidiophores very 

 short. Very similar to an immature Spharopsis malorum but 

 considered distinct by Stewart and his associates.'*** 



It forms bark cankers in pear and apple in America. 



