76 
ENDOSPORE^E. 
[CHONDRIODERMA. 
KEY TO THE SPECIES OF CHONDRIODERMA. 
A. Spoi^angium-wall densely calcareous {Euchondrioderma) : — 
A. Spores reticulated. 2. C. subdictyospermum 
B. Spores not reticulated — 
a. Columella white or pinkish, sporangia white. 
Spores violet-brown, 7 to 11 /x diam. 
1. 0. s2mmarioide8 
Spores dark purplish-brown, 10 to 14 jx diam. 
3. C. globosum 
b. Columella flesh-coloured, hemispherical or flattened. 
Sporangia subglobose, sessile, pink — 
4. 0. testaceum 
Sporangia disc-shaped, stalked, columella flattened. 
5. C. Michelii 
Sporangia forming plasmodiocarps, white. 
6. C. i^eticulatum 
c. Columella orange, hemispherical, or hardly evident. 
7. C. niveum 
d. Columella red-brown, clavate or cylindrical. 
8. G. Lyallii 
B. Sporangium -wall cartilaginous (Leangium) : — 
A. Sporangium-wall white and crystalline on the inner side. 
9. C. Trevelyani 
B. Sporangium-wall without a crystalline layer — 
a. Spores with widely scattered warts. 
13. G.floriforme 
b. Spores closely spinulose, warted, or nearly smooth — 
Columella hardly evident, sporangia sessile. 
10. G. Sauteri 
Columella hemispherical or subglobose ; stalk stout, 
' ochraceous. 11. G. radiatum 
Columella clavate, white ; stalk slender, black. 
12. G. rugosum 
Columella cylindrical, brown ; stalk dark brown. 
14. G. llookeri 
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 Rost., Mon., p. 174, figs. 142 to 145, 151 
(1875). Plasmodium white, among dead leaves. Sporangia sub- 
