Tillct/acece. 



'43 



B. Sori pci'niaiiciitlv itnhcdded in tissues. 



a. Spoie-])alls with sterile i)eriphcral cells. 



16. Doflssr/wsia.— Germination by a short proniyccliuni, with 



terminal cluster of conidia, which often heai- secondary 

 and tertiary groups. 

 h. Spoie-balls without sterile peripheral cells. 



«. Spore-balls with or without central sterile parenchy- 

 matous cells. 



17. BuiriUia. — Germination as in Eutvloma. 



p. Spore-balls with central network of filaments. 



18. Tracija. — Germination as in Doassansia. 



y. Spore-balls composed entirely of fertile spores which 

 are dark coloured. 



19. Tuhurcinia.—GfQiLmiivAiioii by promycelium with terminal 



conidia not separating, but fusing in pairs. Sometimes 

 surface conidia produced from hyphae, forming conspicuous 

 white growth. 



