312 



USTILAGINEAE. 



germination produce a thread-like promyeelium 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. occurs on leaves of Symphytum tuberosum, 

 S. officincdis, and Borago officinalis. 



E. canescens Schroet. On Myosotis (Britain). 

 E. fuscum Schroet. 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 o£F conidia.' (Britain.) 



E. corydalis De Bary on Corydalis 

 cava and C. solida. 



E. helosdadii Magn. on Heloscladium 

 nodiflorum. 



These do not produce conidia on 

 the host-plant : 



E. thalictri Schroet. on ThaUctrum 

 minus (U.S. America). 



E. vemiculosum Pass, on Ranuncuhis 

 lanuginosus. 



E. Fischeri Thtim. on Stenactis bellidi- 

 Aora. 



E. chrysosplenii (Berk, et Br.) on 

 Ch-ysosplenium altemifolium (Britain). 



E. linariae Schroet. on Linaria vulgaris 

 (TT.S. America). 



E. picridis Eostr. on Picris hieracoides. 



E. eryngii (Corda) on EryTigium, planum 

 and E. campestre. 

 Calendula, Hieracium, Amoseris, Arnica, 



Fig. 16S. — Entyloma calendulae. a, My- 

 celial filament, with two young resting- 

 spores. by Resting-spore germinating ; 

 the anterior pair of primary conidia 

 shows conjugation or fusion at the base. 



Entyloma microsporv.m. c, Germinat- 

 ing resting-spore ; four primary conidia 

 fusing in pairs at their apices, d. The 

 same specimen seTen hours later; com- 

 mencement of abjunction of a secondary 

 sporidium on each pair. (After De 

 Bary.) 



E. calendulae (Oudem.) on 

 Bellidiastrum, 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. bulbosus, and R. Ficaria 

 (Fig. 168). 



E. Aschersonii (Ule) on roots of Helichrysum areiiariwm (Fig. 169). 



E. Magnusii (Ule) on roots of Gnaphalium uliginosum and O. luieo-album 

 (Fig. 170). 



^ H. M. Ward, Philosoph. transactions of Royal Soc. London, Vol. 17S, 1889. 



