260 



RESEARCHES ON FUNGI 



Fig. 130. — Tilletia tritici. The germination of basidiospores and the produc- 

 tion of chlamydospores in pure cultures made with malt-agar. A, the 

 emission of germ-tubes by basidiospores : a and b, two basidiospores 

 which have just been discharged, each exhibiting a refringent particle 

 p at its basal end where it broke away from its sterigma ; c and e, basidio- 

 spores which have emitted germ-tubes from their apical end ; d and /, 

 basidiospores which have emitted germ -tubes from their basal end ; 

 d, e, and / show normal germination, including the migration of the 

 protoplasm along the germ-tubes and the formation of septa ; g, h, and 

 i show abnormal germination, for new germ-tubes have developed and 

 have withdrawn protoplasm from the old ones. Magnification, 570. 



B, a new basidiospore produced directly on an old one : a and b, two 

 discharged basidiospores each of which, on an exhausted substratum, 



