GASTEROM YCETES 



489 



and thin, while the septa are thick and composed of slender tramalhyphae. 

 The spores are small, ellipsoidal and minutely verrucose. In an unnamed 

 California species, the columella penetrates only about half way through 

 the fructification, and is but slightly branched, while the septa are much 



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Fig. 311. — Hymenogaster tener. A. Habit (natural size). S. Section of fructification 

 (X3.5.) C. Portion of gleba. (X 120.) D. Basidium and spores. (X 450.) After 

 Tulasne.) Hymenogaster Rehsteineri. E to G. Sections showing development of fructifi- 

 cation. ( X 450; after Rehsteiner.) 



thinner and the spores much larger. In D. cambodgensis, the peridium 

 is distinguished by fascicles of erect yellow hyphae. In the other sub- 

 genus, marked by a gelatinous sheath about the spore and a disappearance 

 of the sterile base, we get a gradual development of the columella from D. 



