23S YORKSHIRE NATURALISTS UNION. 



" This pest is more especially injurious to young cherry- 

 trees, but also attacks the apple, peach, and other cultivated 

 and wild plants belonging to Rosacea ; it also occurs on 

 species of Vaccinium " (Mass. Text-Book of Plant Diseases). 



1670. Podosphsepa tridactyla (Wallr.) De By. 

 N.E. — Scarboro', on Prunus Padus, bird-cherry. 



SPH^ROTHECA Lev. 



1671. Sphaepotheca pannosa (Wallr.). 



Common on wild and cultivated rose bushes, especially 

 in the conidial' [Oidinm leiiconicum Desm.) condition; it 

 attacks the stems, leaves, and calyces. Records numerous. 



1672. SphsBPotheca castagnei Lev. 

 Mid W. — Malham ; Grassington (Lees' Fl.). 



S.W. — Bingley; Saltaire (Lees' FL). PotridingsWood, on 

 Alchemilla vulgaris (F.F. '01, 'Nat.', Nov. '01 =5. hnmnli). 

 Flebden Bridge, on Spircsa Ulmavia (Fl. Hx.). 



N.E. — Hawnby, on 5. Ulmavia '83 (J.A.W.). Scarboro', on 

 vegetable- marrow. Egton Bridge, on garden peas (F.F. '02). 



S.E. — Nr. Selby on hop — I/umulus Lapnlns (R.H.P.). 



N.W. — Masham, on A. vulgaris ('Nat.', Jan. '02 = 5. 

 humnli) . ' 



" Parasitic on numerous wild plants of various Orders " 

 (Mass. Text-Book of Plant Diseases). 



PHYLLACTINIA Lev. 



1673. Phyllactinia suffulta (Reb.) Sacc. [Phyllactinia 

 guttata Lev.] . 



MiD W. — On leaves of hawthorn, hazel, and forest trees, 

 locally abundant (Lees' Fl.). 



S.E. — Near Hull, on hawthorn, common (R.H.P.). 

 , N.E. — -Raincliff, Scarboro' on Covylus Avellana. 



" This fungus is also parasitic upon the leaves of elm, ash, 

 birch, beech, alder, willow, oak, hornbeam, honeysuckle, 

 spindle-tree, cornel, and sea-buckthorn " (Mass. Text-book 

 of Plant Diseases, p. 98, f. 26). 



Trans. Y.N.U. 1905 (pub. 1905). Bot. Series Vol. 6. 



