CKIBEARIA.J HETERODEEMACE^. 139 



-B. ISTodes of the net expanded : — 



A. Sporangia nut-brown — 



a. Oup perforated at the margin, merging into the 

 branching nodes. 5. Q. macrocarpa 



h. Cup well-defined, nodes flattened, angular, branching, 

 continued into the connecting threads. 



6. C. aurantiaca 

 c. Cup replaced by strong ribs, nodes flattened. 



7. C. sphndens 

 di Cup well-defined or absent, nodes thickened, pro- 

 minent, numerous — 



Nodes with many free rays, connected by more or 

 less parallel delicate threads. 8. G. intricata 



Nodes rounded in outline, with few or no fi-ee 

 rays, connected by three to five delicate threads. 



9. C. tenella 



B. Sporangia purple- or red-brown — 



a. Stalk two to three times the height of the spo- 

 rangium, plasmodic granules 2 fx, diam. 



10. G. pyriformis 



h. Stalk four to six times the height of the spo- 

 rangium — 



Cup one-third of the sporangium, nodes polygonal, 

 plasmodic granules 0'5 to \ it. diam. 



11. G. languescens 



Cup minute or absent, nodes rounded, prominent, 

 plasmodic granules 1 '5 to 2 /i diam. 



12. G. microca/rpa 

 < c. Sporangia purple — 



Cup one-third the sporangium, 0'7 mm. diam. 



13. G. purpurea 

 Cup one-half the sporangium, 0'5 mm. diam. 



14. G. elegana 

 D. Sporangia violet-blue, sporangium 0'25 mm. diam. 



15. G. violacea 



1. C. argillacea Pers., in Rcimer, N. Mag. Bot., i., p. 91 (1794). 

 Plasmodium lead-coloured, in rotten wood. Total height 0"75 to 

 1-5 mm. Sporangia globose, crowded, stipitate, erect, or sessile, 

 0-5 to 0-8 mm. diam., clay-coloured ; cup imperfectly defined ; 

 sporangium-wall subpersistent throughout, delicately membranous 

 above, stouter towards the base, reticulated with strongly or 

 faintly thickened bands, which are beset with dark plasmodic 

 granules 1 /a, diam., and form a net with hardly expanded nodes 

 and subquadrangular meshes about 0"1 mm. wide. Stalk 



