108 



ENDOSPORE^. 



[STEMONITACEiE. 



Subcohort 11.— AMAUROOH^TINE^. Sporangia single, 

 or combined into an sethalium, without deposits of lime ; capil- 

 litium and spores dark-brown or violet-brown, rarely pale. 



Order I. — STBMONiTACBiE. Sporangia stipitate; sporangium- 

 wall a simple delicate membrane, often evanescent ; stalk ex- 

 tending within the sporangium as a columella from which the 

 branching threads of the capillitium take their origin. 



KEY TO THE GENERA OF STEMONITACE^. 



Sporangium-wall evanescent. Capillitium springing from all parts 

 of the elongated columella, ultimate branchlets united to form 

 a superficial net. (15) Stemoniti^ 



Fig. 23. — Stemonitis splendens Eost. 

 a. Group of sporangia. Natural size. 



J. Portion of capillitium and columella. Magnified 

 42 times. 



Sporangium-wall evanescent. Capillitium as in Stemonitis, but not 

 forming a superficial net, or only imperfectly towards the base 

 of the sporangium. (16) Oomatricha. 



,jj Fig. 24. — Coniatriclia ohtiisata Preuss. 



a. Group of sporangia. Natural size. 



h. Sporangium deprived of spores showing the 

 capillitium. Magnified 16 times. 



Sporangium-wall evanescent. Columella reaching to the apex of 

 the sporangium, capillitium springing from beneath the super- 

 ficially expanded end of the cohimella. (17) Enerthenema. 



Fig. 25. — Enerthenema elegans Bowm. 



a. Group of sporangia. Twice the natural size. 



J>. Sporangium. Magnified 16 times. 



c. Sporangium deprived of spores, showing the 

 capillitium. Magnified 16 times. 



Pig. 25. 



