10 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



As regards the distribution in Scotland of the 

 several species, I adhere to the division into river- 

 basins first suggested by Dr. Buchanan White 

 (Scot Nat, Vol. 1, p. 161), and followed in the 

 Mycologia, only separating the province of Moray by 

 the Caledonian Canal into the two provinces of 

 Moray and Cromarty, Of these two, Moray has had 

 its fungi investigated by Dr. Keith with a success 

 not equalled elsewhere in Scotland ; but the fungi 

 of Cromarty are still almost unrecorded. 



In the subjoined list the numbers and names 

 under which the species stand in the Mycologia 

 Scotica are given in brackets, following the letters 

 "M.S." Brief descriptions are given of species that 

 are not included in Cooke's Handbook of British 

 Fungi, for the convenience of botanists who may 

 not have ready access to foreign works. 



I have noted the name of the discoverer (D.) and 

 of the recorder (R.) in the case of each species of 

 which I know these particulars, of course only as 

 regards their history as Scotch plants. In the hope 

 of adding ito the value of this revision I have 

 added the usual sign (!) after the names of all those 

 host-plants on which I have found the fungi in 

 Scotland, and also after all those i^rovinces in which 

 I have myself seen the latter growing, whether such 

 host-plants or such distribution had been previously 

 recorded or not. 



Sub-family I. ERYSIPHEAE. 

 Genus 1. Sphaerotheca Lev. 



1. S. pannosa (Wallr.) Lev. (M.S. 1825).— On Hoses I 

 both wild and cultivated, forming a dense mycelium 

 on the leaves and young twigs and buds, in summer 

 and autumn. 



Clyde ! Tay ! Argyle ! Dee ! Moray ! 

 Almost throughout Europe, in India, and in North 

 America. 



2. S. Castagnei Lev. (M.S. 1826).— -Forms a pale coat 

 either in spots, or along the edges of the leaves, or 



