490 



COMPARATIVE MORPHOLOGY OF FUNGI 



utriculatus, where it penetrates the center of the fructification, and, in an 

 undescribed species from Tennessee, ends in a spherical knob from which 

 the septa radiate. In forms like D. globosus (Hymenogaster globosus), 

 it is dichotomously branched and nearly percurrent, as in the Elasmo- 

 myces group of the Hydnangiaceae. The spores in this species are longi- 

 tudinally ribbed suggesting Gautieria where the spores are characterized 

 by 8 to 10 longitudinal ribs. 



Fig. 312. — Gautieria graveolens. A. Habit. B. Section of fructification, showing colum- 

 ella and tramal plates. ( X 2; after E. Fischer, 1900.) 



In Gautieria we have a gradual degeneration of the peridium from such 

 species as G. Rodwayi and G. Parksiana with thick peridia, through 

 undescribed species with thin evanescent peridia, to species where the peri- 

 dium is absent at maturity, although still present in young individuals. 

 Only this last group has been studied ontogenetically (Fitzpatrick, 1913). 

 The fructifications are spherical, furrowed and 0.5 to 2.5 cm. or more in 



£•.•,.•, ::,—Per 



Fig. 313. — Gautieria graveolens. Development of fructification. Per, peridium; z. str, 

 columella; H. A., hymenial fundament; Tr, tramal plate. (After Fitzpatrick, 1913.) 



diameter (Fig. 312). They develop from clavate ends of rhizomorphs. 

 The rind consists of loosely interwoven inflated hyphae, incrusted with 

 calcium oxalate; it continues unaltered into the peridium of the young 

 fructification (Fig. 313, 1). Similarly, the core of the rhizomorph 

 becomes the columella of the young fructification. Its hyphae are inter- 

 mingled somewhat with swollen hyphae, and run parallel to the axis. In 

 the peripheral parts, they radiate toward the peridium and form dense 



