122 British Fungi, 



841; Cke. Hdbk. n. 1783; Cke. Micr. Fung. p. 

 216. 



On living leaves of leguminous plants belonging to 

 the following genera : — Ononis, Medicago, Melilotus, 

 Tr (folium, Lotus, Coronilla, Astragalus, Orohus. 

 Common. Usually covering the entire under surface 

 of tlie leaves with a very delicate greyish film. 



Teronospora violaxea, Berk. 



Forming minute, scattered, pale lilac tufts ; my- 

 celium with saccate haustoria; gonidiophores very 

 short, 5 — 7 times dichotomously divided, primary 

 branches few, erect, termiual branchlets short, erect ; 

 gonidia elliptical, lilac, 30-40x16-20 fi; oospores 

 globose, epi>pore brown, irregularly plicate, thick 

 (5-8 /x), 20-26 f6 diameter. 



Feronospora violacea, Berk. Outl. p. 349; Cke. 

 Hdbk. n. 349; Cke. Micr. Fung. p. 217; Sacc. Syll. 

 vii. 846. 



On petals of Scahiosa arvensis. Not uncommon. 



The vesicular haustoria are unusual in the genus 

 Peronospora. 



Possibly the above species is identical with a fungus 

 described by Leveille (Ann. Sci. Kat. 1846, p. 298) as 

 ^^Botrytis violacea; hyph^e erect, continuously dichoto- 

 mously branched ; gonidia ovate, glabrous, violet.^' 



On flowers of Pyrethnim arvense, and on living 

 leaves of Lathyrus palustris. Found in France. 



Feronospora grisea, De Bary. 

 Forming dense, felt-like, violet-grey tufts on the 

 under surface of leaves; gonidiophores fasciculate, 



