176 MICROSCOPIC FUNGI. 



parasitism. It is found also on other plants of the- 

 same natural order, on the rest-harrow, trefoils, 

 enchanter's nightshade, bindweed, and knotgrass. 

 There are from four to eight sporangia in each con- 

 ceptacle, containing from four to eight spores (fig. 

 241). In this species, more especially, M. Tulasna 

 found curious sucker-hke processes developed on 

 the threads of the mycehum (fig. 242) : their office 

 may probably be only that of attachment. 



Of the other species found in Britain an enume- 

 ration will suffice, since they contain no feature of 

 interest to the microscopist ; and all the members 

 of this section are far less beautiful than those in 

 other genera (especially Microsjphoeria). 



The leaves of the dogwood or cornel (figs. 245, 

 246) are the home of one species {E. tortilis, Lk.), 

 and the burdock of another {E. Montagn&ij Lev.). 

 Both of these, in addition to the above, have spo- 

 rangia which contain more than two spores. There 

 are also two species in which only two spores are 

 contained in each sporidium. One of these {E.. 

 Linhii, Lev.) is found on both surfaces of the leaves 

 of the mugwort (figs. 248, 249) ; the other {E. lam- 

 procai'jja, Lev.) occurs on salsafy, scorzonera, 

 weasel-snout, and plantain (figs. 250, 251). 



These complete the Erysiphei; but there are allied 

 species of too much interest not to be noticed in 

 connection with them. Three very singular fungi 

 are found on damp straw and paper ; two on the 

 former and one on the latter. Of the species 



