112 



IMIYCOMYCETKS. 



on steins, flower-stalks, radical and cauline leaves, and floral 

 envelopes. 



Leucochytrium. 



(1) l''(iriiiiiiu- simple vesicles: 



S. punctatum, Sehroet. On G(uirii prafcn^^ls. 



S. rubrocinctum, Magnus, forms little red eruptions on Saxi- 

 frafja iji'aiiiilntd, the cell-sap of the host-plant becoming red. 



S. alpinum, Thomas. On Viola hiflom. 



S. anomalum, Sehroet. (U, S. America). On AiJu.ia Moscha- 

 ti'llina, less common on Ranunculus Ficaria, Isopijrurii thalictroidcs 

 and Rumi'x Acctosa. The size and shape of the swellings, as well 

 as of the spores, are very variable. 



(2) Forming compound vesicles: 



S. anemones, De Bary and Wor. (U. S. America). On 

 A/u/none ncmorosa, A. ranunculoides and Thalictrum 2'^urpura- 



^^^.y^M 



h 



^d-A 



Fio. •n.—Synchytrium anemones. The sporocarps form black points on leaves, 

 petioles and perianth of the Anemone ; the laminae are also stunted and distorted, 

 (v. Tubcuf del.) 



sccas, attacking stems, leaves, ur flowers, and forming eruptions 

 whose cells contain a red sap. In very bad cases, crumpling 

 and swelling of attacked organs occur. 



