Classificatio n. 123 



thick, greyish-violet, 5-7 times regularly dichoto- 

 mously divided; branches attenuated upwards, the 

 primary ones ascending, the remainder patent, flexuous, 

 ultimate branchlets generally unequal, slightly curved ; 

 gonidia elliptical, very obtuse, pale dirty lilac, 25-30 

 X 15-22 fjL ; oospores clear brown, wall thick, smooth, 

 30-40 fM diameter. 



Peronospora grisea, De Bary, Ann. Sci. Nat. ser. 

 iv. vol. XX. p. 119, t. 13, f. 12 ; Cke. Hdbk. n. 1784 ; 

 Cke. Micr. Fung. t. 10, f. 213 ; Sacc. SylL vii. 852. 



Botrytis grisea, Unger. Bot. Ztg. 1874, p. 315. 



On under surface of leaves of scrophulariaceous 

 plants, — Veronica heccahiinga, V. serpyllifolia, V. 

 scutellata, V. arvensis, V. ver7ia, V. trijjhylla, V. 

 hedercefolicbj V. anagallis. Not uncommon. 



Peronospora lamii, De Bary. 



Forming dense, effused, greyish-lilac patches, goni- 

 diophores short, 5 — 7, generally 6 times dichotomously 

 divided, branches tapering upwards, spreading, more 

 or Jess curved, ultimate branchlets generally elongated, 

 subulate ; gonidia broadly elliptical, with a short 

 persistent pedicel, pale dingy lilac, 17-22 x 15-20" 

 oospores small, brown. 



Peronospora lamii, De Bary, in Kab. Herb. Myc. 

 ed. ii. n. 325 ; Sacc. Syll. vii. 853. 



On under surface of leaves of labiate plants, as 

 Lamium allmrrij L. ruhrum, L. amplexicaule, L. macu- 

 latum; Salvia pratensiSy Stachys palastris. Not 

 common. 



Often forming broadly effused felt-like patches on 

 under surface of leaves. 



