The Scottish Naturalist. 



63 



Rhytisma acerinum (Pers.) On Acer Pseudoplatanus, Clyde,, 

 near Inveraray. 



Hysteriacese. 



Dichaena quercina (Pers.) On bark of Quercits Robur, *Clyde r 

 Inveraray, &c. 



D. faginea (Pers.) On bark of Fagi/s sylvatica, *Clyde, 

 Inveraray, &c. 

 Of both species of Dichcena only immature forms were met with. 



Acrospermum compressum Tode. On dead leaves of Deschampsia 

 ccespitosa, *Clyde, Duniquoich. 



Perisporiacese. 



Sohoerotheca Castagnei Lev. On Spircea Uhnaria, *Argyle, 



Cladich ; *Clyde, Inveraray, &c. 

 S. pannosa (Wallr.) Lev. On Rosa tomentosa, *Clyde, St. 



Catherine's. 



Uncinula Aceris (D. C.) Sacc. On Acer Pseudoplatanus, *Clyde, 



Inveraray, Tarbet. 

 Podosphsera Oxyacanthse (D. C.) De Bary. On Crataegus Oxya- 



cantha, *Clyde, St. Catherine's. 

 Erysiphe Galeopsidis D. C. On Stachys sylvatica, *Forth, 



Trossachs. 



Oidium erysiphoides Fr. On Geum urbanum, Semcio Jacobcza,. 

 and Veronica Chamaedrys, Clyde, Tarbet. 



Pyrenomycetes. 



Phyllachora Junci (Fr.) Fckl. On Juncus conglomeratus and J. 



effusus, common in all the districts. 

 Microthyrium microscopicum Desm. On dead leaves of Q. Robur* 



*Clyde, Glen Aray. 

 Xylaria Hypoxylon (L.), Grev., Clyde, Inveraray (J. S.) 

 Asterina Veronicas (Lib.) Cooke. On Veronica officinalis, *Clyde, 



Glen Aray. 



Lsestadia faginea (Awd.) On dead leaves of Fagus sylvatica, 



*Clyde, Essachossan. 

 Sphaerella Cerastii Fckl. On Cerastium triviale, *Argyle, 



Cladich ; *Clyde, Glen Aray. 



Lophodermium hysterioides (Pers.) 

 == Hysterium foliicolum Fr. 



On dead leaves of Cratcegus 

 Oxyacantha, *Clyde> 

 near Inveraray. 



