TUBERCTJLINA. 



Tuberculina. 



32r 



Mycelium parasitic on hyphae and spore-patches of Uredineae. 

 Short rod-like hyphae spring from the spore-patches, and give 

 ofi' from their apices, globose conidia, which on germination 

 produce branched promycelia bearing sickle-shaped conidia. 



Fig. 179. — ScMifizia cypericola on Ct/perus Jkivescens. Several roots show palmately- 

 divided swellings. Isolated spore. (After Magnus.) 



Tuberculina persicina Ditm. The lilac-coloured spores are 

 found on aecidia of Feridermium pini and other aecidial forms,, 

 also on some species of Caeoma} (Britain and U.S. America.) 



^ Plowright (British Ustilagineae) gives also Aec. asperifoUi, Aec. tussilaginiSf 

 and Roestelia lacerata as hosts. 



