40 



Trichia clirysosperma Bull.— H 121, H 202, Vermilion lake. The lat- 

 ter varies considerably from the typical form. 



Tubulins cylindrica Bull — II 171, St. Louis river. 



CHYTKIDINE.&. 



Syucliytrium asari Arthur & Holway (n. ap.). Spots indistinct; galls' 

 flattened hemispherical, scattered; resting spores solitary, spherical, .10-.12 mm. 

 in diameter; epispore dark brown, smooth. — A 86, Vermilon lake. On leaves 

 and petioles of Asarum canadense. 



The galls are formed by the swollen epidermal cells surrounding the host- 

 cell, and are depressed in the centre, apparently forming a pore. They are 

 thickly scattered over the petiole and both surfaces of the leaf, either over the 

 whole leaf, which is the usual way; or over definite portions of it. The color of 

 the leaf is scarcely altered, but the affected leaves are ma.de conspicuous by the 

 minutely blistered and somewhat distorted appearance given by the parasite. 

 The spores are very uniform in size and shape. 



