512 COMPARATIVE MORPHOLOGY OF FUNGI 



Only a portion of the following stage can be shown at once since in 

 the meantime the fructification has grown too large. Such a section 

 is given in Fig. 332, 5, where the rind and the volva gel Vg are separated. 

 The differentiation of the columella proceeds through the cap P to the 

 volva gel. Similarly the stipe St of the fructification has elongated; 

 subsequently its bulk increases still further and soon exceeds the sporif- 

 erous part. Along the columella Z. sir. there has been differentiated 

 from tissue A, a thicker chambered cover, the fundament of the future 



1 



..VG, 



&—0. 





.-.. R 





■''."■- A' TTA •• ■'*■'. :■'■■■■ • V-*"-.-V. • . u 



Fig. 332. — Mutinus caninus. Development of fructification. (1,2 X 70; 3 X 44; 4, 5 X 



24; 6 X 6; after Burt, 1896.) 



stipe walls of the receptacle. The members of its hyphae swell gradually 

 so strongly that the chamber walls in the lower part of the receptacle 

 stipe lie in folds. This receptacle corresponds to the receptacle stipe of 

 Colus, Anthurus and Aseroe in the Clathraceae. 



A longitudinal section through an immature fructification is given 

 in Fig. 332, 6. The gleba Gl. has already darkened, and is separated from 

 the volva gel by a narrow layer, the compressed zone P, and from the stipe 

 wall by the vestiges of the intermediate tissue A. In the South American 

 Mutinus Muelleri, these vestiges become large spherical cells; in M. 



