1919] 



MATSUMOTO — CULTURE EXPERIMENTS WITH MELAMPSORA 



311 



Melampsora Larici-Urbaniana Matsumoto, n. sp. 



Aecidiospores. Caeomata hypophyllous, scattered, pale 

 orange-yellow with yellow spots on the upper surface, roundish 



13 



Fig. 1. Melampsora Larici-Urbaniana. Caeomaspores. Camera 

 lucida drawing X460. 



oblong; spores roundish or oval, finely echinulate, li 

 -19 u: membrane hyaline, 3-4 a thick. 



26 X 



Uredospo 



Sori hypophyllous, densely scattered over the 



whole lower surfac 



Melampsora Larici 



Uredospo res. 



am 



drawing X460. 



surface, seated on small orange-yellow spots; spores mostly oval, 

 sometimes oblong or roundish, with a more or less elongated 

 stalk, 15-26X12-17 p.; membrane hyaline, echinulate, without 

 perceptible germ pore; paraphyses capitate, with a thin pedicel 

 (3-4 M ), 50-70X18-22 p. 



