CHYTRIDIE.E. 201 



Synchitrium Taraxaci. D. By. $ Wor. Bericht. der Naturf. Ges. 



Freiburg in., t. 2, /. 1-7. 



Orange warts, about *5 mm. diam., prominent on both sur- 

 faces of the leaf, scattered or crowded. During summer each 

 wart contains a mass of crowded cells, polygonal or rounded, 

 variable in form and size, filled with granular orange proto- 

 plasm, which break up into globose, ciliated zoogonidia. 



SIZE. Zoogonidia '003 mm. ; cellules '02-'06 mm. diam. 



Parasitic beneath the cuticle of living leaves of dandelion 

 (Taraxacum officinale). 



Professor Trail adds to the above description that "in the autumn 

 thicker-walled resting spores are formed singly in the cells of the food 

 plant." 



Plate LXXX2. jig. 5. Sorus of Synchitriwn Taraxaci X 200. Figs. 6, 

 7, cells with contents converted into zoogonidia, X 400. Fig. 8, free 

 zoogonidia, X 400 ; after Woronin. 



Synchitriuxn anemones. Woron. Bot. Zeit, XXVI., p. 100, t. 2, 



/. 8-10. 



Forming dark violet, or almost black, hemispherical warts, 

 the size of a pin's head, which are gregarious, and sometimes 

 confluent. In the centre of each is a spherical cellule, the wall 

 of which is dark brown and warted. 



Dothidea anemones, DC. Fl. Fr. vi., 143. 



Sphceronema anemones, Libert. Crypt. Ard., No. 167. 



Septoria anemones, Fuckel Fung. Rhen., No. 518. 



Chytridium ? anemones, D.By. & Wor. Beitr. p. 29. 



Parasitic on the leaves of Anemone nemorosa. 



Plate LXXXII. jig. 7. Portion of leaf with Synchitrium nat. size. 

 Fig. 8, persistent spore- cell in situ X 200. Fig. 9, persistent spore-cell 

 free X 320 ; after Woronin. 



Synchitxium mexcurialis. Fckl. Fungi Rhen., No. 1067. 



Tubercles confluent on the nerves of the leaves, hemispheri- 

 cal, greenish, depressed above ; umbilicated ; sori oblong, grey, 

 zoogonidia globose, uninucleate, hyaline. 



SIZE. Sporangia echinulate '03-'04 mm. 



Schrcet. in Cohn's Beitr. p. 40. Grevillea ii., p. 162. 



Parasitic on leaves of Mercurialis perennis. April, 



Plate LXXXII. Jig. 1. Section of wart with persistent spore-cell. 

 Fig. 2, persistent cell. Fig. 3, same with contents polygoiially divided. 

 Fig. 4, sporangia escaping X 160. Fig. 5, sporangia X 320. Fig. G, free 

 zoospores X 320 ; alter Woronin. 



