GASTEROMYCETES 



513 



A 



fog 



8 



zwm 





Fig. 333.— Mu- 

 tiny, s caninus. 

 Mature fructifica- 

 tion, showing gleba. 

 (Natural size; after 

 Fischer, 1900.) 



nMM 



m 



Pi 

 It! 



bambusinus of the tropics, this change occurs only in the proximal portion 

 of the stipe and is entirely absent in M . caninus of the north temperate 

 zone. 



The habit of a mature fructifi- 

 cation is shown in Fig. 333. The 

 stipe of the receptacle is white or 

 reddish, the sporiferous part is 

 dirty purple-red. The pileus is 

 lacking and the gleba lies directly 

 on the sides of the receptacle. 



In the other genera of the 

 Phallaceae, the fructifications are 

 formed according to the plan of 

 Mutinus, but the intermediate 

 tissue A undergoes a higher differ- 

 entiation. 



A first step in this direction, we 

 find in Phallus tenuis of southern 

 Asia (E. Fischer, 1887). In it, the 

 top of the tramal plates which press 

 inward toward the layer A are not, 

 as in Mutinus (and in the Hyster- 

 angiaceae), covered with a hymen- 

 ial palisade. Their hyphae develop 

 (as mutatis mutandis in Hysteran- 

 gium of the Hysterangiaceae) into 

 the intermediate tissue A and con- 

 nect laterally with the outgrowing 

 hyphae of the neighboring tramal 

 plates. Thereby a continuous 

 layer H, divided by elevations and 

 depressions (Fig. 335), shuts off the 

 gleba chamber on the inside. At 

 its apex it connects with the top of 

 the stipe wall (receptacle) ; further 

 down it is separated from the stipe 

 wall by the remains of the layer A . 

 The gleba does not lie directly on 

 the stipe, as in Mutinus, but on 

 the new campanulate tissue plate, 

 which subsequently becomes the pseudo-parenchymatous pileus of the 

 young fructification. When, at maturity, the receptacle elongates by 

 straightening the folded chamber walls, the pileus with the gleba is raised 

 out of the volva gel and the gleba drops off. The representation of such 





VI* 



•c 





„ TUJ. 



Fig. 334.— Phal- 

 lus tenuis. Unfolded 

 fructification after 

 d i s a p p earance of 

 gleba. (Natural 

 size ; after Fischer, 

 1887.) 



