390 



FUNGi 



It is manifest therefore that in these simple types we have repeated 

 very much the same order of things as in the tremelloid Uredinese. It is 

 perhaps most striking in the case of Exobasidium, from which the transi- 

 tion is easy to the Tremellineae. The layer of basids and basidiospores may 

 be compared with the layer of teleutospores, while the transverse division 



FIG. 318. Coprinus stercorarius Fr. A, B, and C, germinating spore in successive stages. D 

 portion of mycele, *, with five early stages of development of fungus. E and F, further stages. 

 (7, longitudinal section through germinating sclerote, s, with young fungus still within volva, t>. 

 //, fully developed fungus with sclerote, s, and rhizoids, r. (AC x 300, D x 200, E x 120, 

 F x 50, G and H natural size.) (After Brefeld.) 



of the basidiospores into four cells, two of which germinate, heightens the 

 resemblance. Farther the production of secondary spores on the short 

 germ-tubes of basidiospores recalls the formation of sporids on the 



