262 A Monograph of the Erysiphaceae 



Fig. 123. P, Schkchiendalii^ apex of two appendages. 



Figs. 124-126. Sphaerotheca phytoptopJdla : 124, perithecium artificially burst open, 

 forcing out the ascus and the inner wall, X ^55 ; 125, portion of the inner wall ; 126, 

 ascus and ascospores. 



Figs. 127-129. Erysiphe galeopsidis on Stachys sylvatica ; 127, conidiophores and 

 conidia; 128, 129, hyphae, showing lohed hau.storia (128 X 980). 



Fig. 130. Lobed haustoria of Erysiphe on Eupatormm ageraioides, X 670. 



Figs. 131. Haustoria q{ Ejysiphe cichoyaceayion on Sonchus arvensis, X ^70- 



Figs. 132-139. E, polygoni; 132, asci (a t}'pical form) ; 133, from specimen on 

 Lupimis; 134, from specimen on Cnicus lanceolatus ; 135-I39, ascospores; 135, from 

 specimen on Polygonum; 136, on Circaea Luteiiana ; 137, on Lupimis ; 138, on Oiicus 

 lanceolatus ; 139, on Paniassia CaroHnhma, 



Fig. 140. E, cichoracearzim (on Arctium), conidiophore and conidia; a, b, o, d, 

 successive stages in the development of the young conidiophore. 



Plate 8 



Figs. 141, 142. Erysiphe trina : 141, two perithecia ; I42, ascus and ascospores. 

 Fig. 143. Asci and ascospores of '• E. vernalisj' 

 Fig. 144, E. nggregata, two asci. 



Figs. 145-150, 152-154- E. taurica; I45-I47* 149, three appendages and ascus, 



from the type specimens oi'^ Microsphaera Bormnuelleriana'^ ; 148, 150, two append- 

 ages and ascus from the type specimen of - E. lanata '^. 152, 153, ascus and ascospores 

 from specimens from Leveille's herbarium ; 154, ascus of " E, papilioitacearumr 



Fig. 151. E. dchoracearu7n^ asci and ascospores. 



Fig. 155. E, polygoni on Polygonum avictilare ; section showing a hypha of the 

 mycehum fornung a haustorium in an epidermal cell, X ^70. 



Fig. 156. E,grami?iis, on Hordeum, conidial s'tage {Oidium monilioides), 



Plate 9 



Fig. 157. E. polygoni \-w[. septha ; asci and ascospores. 

 Fig. 158. E. polygoni, on Querais glauca ; ascus and ascospores. 

 Figs. 159, 160. E. graminis; 159, two asci, with 8 spores formed in each, from 

 the specimen in Rab. Fung. Eur. 671 ; 160, two asci (from European examples). 



Fig. 161. " Oidmm Bahamiir conidia (from specimen from Montagne's her- 

 barium). 



Fig. 162. - O. Bahama- on turnips (W. G. Smith in herb Cooke). 



Figs. 163-175. Phylladinia corylea ; section of leaf of Av^.-,-/. zW-^m, showing 

 a special hypha (<« Emahrungshyphe " ) of the mycelium passing through a stoma into 

 the intercellular spaces, and sending a hausterium into a cell of the spongy parenchyma 

 {the lower half of the hypha is seen passing behind some cells in an intercellular space); 

 164, ascus from Japanese specimen on Moms alba; 165, ascus and ascospores from Jap- 

 anese specimen on Patdownia impcrialis ; 1 66, ascus with three spores (from specimen 

 of " P Candollei- from Leveille's herb.) ; 167-169. ascus and ascospores ; 170-.72, 

 appendages ; 172, immature stages, X 255 ; 171, from specimen of " P. berderidis'\- 

 "^^ ^W^'? ^"'Srowths from the apical cells of the perithecium (173, a, stalk cell, b, 

 head of hyphal branches; 174, a branches beginning to coalesce through mucilaginous 

 degeneration) ; 175, apex of one of the branches of an outgrowth, at the stage when 

 the wall .s partly dissolved and invisible without staining, protoplasmic contents evi- 

 dent and resembling a stalked spore, X 670. 



