BASIDIOMYCETES. 



157 



folded, quivering, orange fruit-bodies, about one inch in breadth ; T. lutescens 

 (Fig. 161) has orange-yellow conidial- and yellow basidial-layers ; T. frondosa 

 has fruit-bodies upwards of a foot in breadth. 



Order 4. Pilacraceae. The transversely divided basidia have no 

 sterigmata, but sessile basidiospores, and fill up the cavity of a closed 

 (angiocarpic) fruit-body as a gleba without a regular arrangement 

 (hymenium wanting). 



Pilacre fagi on the old stems of the Copper-Beech ; P. pctersii, on dried 

 branches of the Hornbeam, has stalked, capitate fruit-bodies. 





- ---< . 



.'/r t - J ' ." ^ -,5--- 'W'a.tf 



;-?^^i^:r;^Ss^^^^si^^^?ss^--i; 



On "'' T 23T ' '^ x ri 







FIG. 161. Tremella Itit?scfits: I and II fruit-bodies (nat. size); III vertical section 

 through a fruit-body ; b basidia ; c conidia; IV- VI basidia; VII basidiospore with a 

 second spore ; VIII a basidiospore with yeast-like budding (cultivated) ; IX a conidio- 

 phore. (III-IX about 400.) 



Series 2. Autobasidiomycetes. 



This second and larger part of the Basidiomycetes is character- 

 ised by its more highly differentiated, undivided, club-shaped, or 

 cylindrical basidia, which generally bear 4 (seldom 2, 6, 8) apically- 

 placed sterigmata and basidiospores (Fig. 145). The fruit-bodies 

 are partly gymnocarpic (in the first 3 orders and in some Agarica- 

 cece). partly hemiangiocarpic (in orders 3-6 of the Hymenomycetes 



