76 ENDOSPORE.E. [CHONDRIODERMA. 



L 



KEY TO THE SPECIES OF CHONDRIODERMA. 



A. Sporangium-wall densely calcareous (Euchondrioderma) : 



A. Spores reticulated. 2. C. subdictyospermum 



B. Spores not reticulated- 



a. Coluniella white or pinkish, sporangia white. 



Spores violet-brown, 7 to 11 /x diam. 



1. C. spuma/rioides 



Spores dark purplish -brown, 10 to 14 ^ diam. 



3. C. globosum 



b. Columella flesh-coloured, hemispherical or flattened. 



Sporangia subglobose, sessile, pink- 



4. C. testaceum 



Sporangia disc-shaped, stalked, columella flattened. 



5. C. Michelii 



Sporangia forming plasmodiocarps, white. 



6. C. reticulatum 



c. Columella orange, hemispherical, or hardly evident. 



7. C. niveum 



d. Columella red-brown, clavate or cylindrical. 



8. C. Lyallii 



B. Sporangium-wall cartilaginous (Leangium) : 



A. Sporangium-wall w T hite and crystalline on the inner side. 



9. C. Trevelyani 



B. Sporangium-wall without a crystalline layer 



a. Spores with widely scattered warts. 



13. C. floriforme 



b. Spores closely spinulose, warted, or nearly smooth 



Columella hardly evident, sporangia sessile. 



10. C. Sauteri 



Columella hemispherical or subglobose \ stalk stout, 

 ochraceous. 11. C. radiatum 



Columella clavate, white ; stalk slender, black. 



12. C. rugosum 



Columella cylindrical, brown ; stalk dark brown. 



14. C. Hookeri 



Columella stipitate, brown ; stalk orange. 



15. C. lucidum 



Sub-genus 1. Euchondrioderma. Sporangia sessile, rarely 

 stipitate ; sporangium- wall double, the outer layer a smooth crust 

 composed of globular lime-granules, the inner membranous, more 

 or less separating from the outer layer. 



1. C. spumarioides Host, Mon., p. 174, figs. 142 to 145, 151 

 (1875). Plasmodium white, among dead leaves. Sporangia sub- 



