120 British Fttnoi, 



^> 



mate branches often arcuate, ultimate brancWets often 

 eloDgato-subulate ; gonidia broadly elliptical, pale 

 dirty lilac, 20-25 x 15-18 /a; oospores with a tbickish, 

 pale yellowisb-brown, smooth membrane, 22-32 /a 

 diameter; oogonia subglobose, brown, almost smooth^ 

 35 /^ diameter. 



Peronospora jicarise, Tulasne, Compt. Rend. 26 Jan. 

 1854 ; Sacc. Syll. vii. 835. 



On under surface of living leaves of Banunculus 

 ficaria, R. acris, R. flammulaj R. auricomusj R. 

 hulbostis. Not common. 



Often covering the entire plant and producing fruifc 

 everywhere, except on the roots and flowers. 



Peronospora arhorescens, De Bary. 



Gonidiophores slender, erect, towards the top 7 — 10 

 times divided in a dichotomous manner, branches 

 spreading, more or less flexuous, becoming thinner 

 from the first order, ultimate branchlets very slender, 

 short, subulate, more or less curved; gonidia sub- 

 globose, 15-24 X 15-20, very pale lilac; oospores 

 globose, epispore brown^ minutely strialulate, 25-35 

 /JL diameter. 



Peronospora arhoresce^is, De Bary, Ann. Sci. Nat. 

 ser. iv. vol. xx. p. 119; Cke. Hdbk. n. 1785; Cke. 

 Micr. Fung. p. 217 ; Sacc. Syll. vii. n. 836. 



Botrytis arborescens. Berk, Journ. Hort, Soc. 1, p. 

 31, t. 4, f. 24. 



On the under surface of leaves of plants belonging 

 to the genus Papaver, as P. rhoeaSj P. duhmm, P. 

 soriiniferurriy P. agremo7ies. Not uncommon. 



Often almost entirely covering the under surface of 

 the leaves with a thin cottony felt. 



