524 



COMPARATIVE MORPHOLOGY OF FUNGI 



The germination of basidiospores has only been reported in the last 

 three genera. A basidiospore of Exidia repanda divides into two daughter 



d$*s* 





Fig. 344. — Exidia repanda. 1. a, tip of mature sterigma with reniform basidiospore; 

 b, germination of basidiospore with falcate conidia. 2. Exidia saccharina, var. foliacea. 

 (Ulocolla foliacea) . b, germinating basidiospore; c, germinating conidia. Tremella lutes- 

 cens. 3. Mature basidium. 4. Germinating basidiospores, one surrounded by sprout 

 cells. 5. Sprout mycelium. 6. Sprout cells developing hyphae. 7. Conidiophores. 

 Ditangium Cerasi (Orbilia rubella). 8. Conidiophore. (la, 3 X 450; 16, 5, 6 X 500; 1 c, 

 7 X 420; 2 X 320; 4 X 400; 8 X 300; after Brefeld, 1888.) 



Fig. 345. — Tremella mesenterica. Section through periphery of young fructification. 

 1. Oidial stage. 2. Beginning of basidial formation. 3. Mature basidia. (X600; 

 after Dangeard, 1894.) 



cells which in dilute nutrient solutions develop directly to slender septate 

 mycelia without clamps. In E. saccharina var. foliacea, bacilliform 



