312 



USTILAGINEAE. 



germination produce a thread-like promycelium bearing apical 

 conidia, which conjugate in pairs before emerging from the 

 host-tissues. 



The following species form conidia on the host-plant : 



Entyloma serotinum Schroet. occiirs on leaves of Symphytum tuberosum, 

 S. officinalis, and Borago officinal !x. 



E. canescens Schroet. On Myosotis (Britain). 

 E. fuscum Srhroet. On Papaver Rhoeas and /'. Argemone. 

 E. bicolor Zopf. On Papaver Rhoeas and P. dubium (Britain). 

 E. ranunculi (Bon.) forms white spots on species of Ranunculus. Tufts 



of hyphae emerge from the stomata and 

 form conidia, which on germination again 

 give off conidia. 1 (Britain.) 



E. corydalis De Bary on Gorydalis 

 cava and C. solida. 



E. heloscladii Magn. on Helox<-l<lin,n 

 nodiflorum. 



These do not produce conidia on 

 the host-plant : 



E. thalictri Schroet. on Thalictrum 

 minus (U.S. America). 



E. verruculosum Pass, on Ranunculus 

 lanuginosus. 



E. Fischer! Thiim. on Stenactis bellidi- 

 nora. 



E. chrysosplenii (Berk, et Br.) on 

 Ckrysosplenium alternifolium (Britain). 



E. linariae Schroet. on Linaria vul<jrix 

 (U.S. America). 



E. picridis Rostr. on Picris hieracoides. 



E. eryngii (Corda) on Eryngium plan <'/// 

 and E. campestrc. 

 on Calendula, Hier&cium, Arnoseris, Arni<-. 



FIG. 1(38. Entyloma calendulae. a. My- 

 celial filament, with two young resting- 

 sjiciivs. 1 1, Resting-spore germinating; 

 the anterior pair of primary conidia 

 shows conjugation or fusion at the base. 



Eiit>//oma microsporum. c, Germinat- 

 ing resting-spore ; four primary conidia 

 fusing in pairs at their apices, d, The 

 same specimen seven hours later ; com- 

 mencement of ab junction of a secondary 

 sporidium on each pair. (After De 

 Bary.) 



E. calendulas (Oudem.) 

 Bellidia.it rum, etc. (Britain) (Fig. 168). 



E. crastophilum Sacc. on Poa and Dactylis in Italy. 



The following produce gall-like swellings : 



E. microsporum (Ung.) (E. Ungerianum De Bary) (Britain and 

 U.S. America). On Ranunculus repens, R. bidboms, and R. Fi<-aria 

 (Fig. 108). 



E. Aschersonii (Ule) on roots of lf<'lirl<ri/xiini arenarium (Fig. 169). 



E. Magrmsii (Qle) on roots of GiWj>l<"Hniii uliginosum and G. luteo-albmn 

 (Fig. 170). 



1 H. M. Ward, Philosoph. transaction* <>t' lloyal Soc. London, Vol. 178, 1889. 



