eridium retaining tubular or cornute form, unaltered by dehiscence. 

 Peridial cells rugose. 



Inner and side walls densely rugose, moderately thick (6-7,1). 



11. G. Torminali-juniperinum. 

 Inner and side walls moderately rugose, thick (8-12,*). 



Peridial cells verru cose. 17. G. solenoides. 



Aeciospores medium small (15-25,.), wall rather thin (1.5-2,.). 



34. G. globosum. 

 Aeciospores very large (28-45,1), wall very thick (3-511). 



1 elongated, tubular at first, in some species becoming altered by 



12. G.Davisii. 

 eridium spreading or more or less erect after dehiscence. 



Peridial cells rhomboid in side view (45-9511 long), aeciospore wall 

 coarsely verrucose. 22. G. germinate. 



spore wall moderately verrucose. 30. G. clavariaeforme. 

 Peridial cells linear in side view (150-300,1 long), aeciospore wall, 

 finely verrucose. 29. G. transformans. 



30. G. clavariaeforme. 

 eridial cells verruculose. 36. G. Nelsoni. 



eridial cells rugose. 

 Inner and side walls strongly rugose with ridges of varying length. 



Inner and side walls rugose with long narrow ridges interspersed with 

 roundish papillae. 20. G. Nidus-avis. 



