Fig. 17, 
Sub-Section 2.—Mouths Even. 
Plants Epigeous. 
GEASTER MIRABIEIS. Plants growing densely gregarious, the my¬ 
celium forming a dense cushion. Exoperidium light-colored,smooth. En- 
doperidium sessile, dark colored, contrasting with the light exoperidium. 
This is a very variable 
plant, widely distributed but 
only in warm countries. It 
differs from most Geasters in 
that the plants are epigeous, 
developing on the top of the 
surface, also in the plants 
being borne densely gregar¬ 
ious on an effused mycelial 
subiculum. 
Fig. 18 
FORMS. 
The plants vary much in size and 
in shape of unexpanded plants. Usu¬ 
ally they are globose, sometimes some¬ 
what oval. The typical form (Fig. 
18) is very small ^ cm. in diameter 
but the only Australian form we 
have seen is larger about size of fig. 
19. This large form has been called 
Geaster subiculosus (Grev. 15-97). 
