142 
Phyllactinia, Lév. 
P. corylea, Karst. On Betula alba and Cornus sanguinea. 
Uncinula, Lév. 
U. clandestina, Schroet. The claim of this species to be con- 
sidered as British rests on the authority of Cooke, who records 
it (Kew Bulletin, 1897, p. 138) ^ growing 2 m —Ulmus cam- 
pestris—in the Royal Gai dens, Kew; Ic however, find 
specimens from this locality in n this hart 8 peces at Kew 
(Salm. Mon., p. 98). 
U. adunea, Lév. On leaves of Populus nigra. 
U. spiralis, Berk. & Cooke. On living vine leaves. 
U. Prunastri, Sacc. On leaves of Prunus spinosa. 
U. Aceris, Sacc. On living leaves of Acer Pseudoplatanus. 
U. Prunastri, Saccardo. On leaves of Prunus spinosa. 
Mierosphaera, Lév. 
M. Dubyi, Lév. On living leaves of Lonicera Caprifolium. 
M. Berberidis, Lév. On living leaves of Berberis vulgaris. 
M. penicillata, Lév. On living leaves of Lonicera sempervirens 
and Betula alba. 
Erysiphe, Hedwig. 
E. cichoracearum, DC. On Aster grandiflorus, Centaurea 
nigrescens, Cousinia uncinata. Also very abundant in conidial 
condition on living leaves of various cucurbitaceous plants. en 
abundantly developed the leaves present the appearance of having 
received a coat of whitewash. 
E. polygoni, DC. On leaves of Ranunculus, Delphinium, and 
Polygonum aviculare. 
E. graminis, DC. On living leaves of Hordewm vulgare. 
PERISPORIEAE. 
were Mass. & Salm. 
