& 



502 FUNGI IMPERFECTI. 



ducing conidia at the end of each branch. Conidia septate 

 oval or cylindrical, and light-coloured. 



"The parasitic habit, simple or sparingly branched hyphae, 

 denticulate and bearing the septate conidia at the tips, charac- 

 terize the genus, which differs from Urulnrifi only in the 

 septate conidia " (Massee). 



Ramularia cinarae Sacc. is said by Prillieux 1 to have caused 

 great destruction in the cultivation of artichokes. The leaves 

 became spotted and died, so that no flower-heads were produced. 



The following are British species : 



Ramularia hellebori Fuck. On leaves of ffelleborus foetidus and H. 

 viridis. 



R. epilobii (Sclin.). On leaves of Epilobium. 



R. ulmariae Cooke. On leaves of Spiraea Ulmaria. (U.S. America.) 



R. geranii Fuck. On under surface of leaves of various species of 

 Geranium. 



R. lampsanae (Desin.). On Lampsana and Hypochoeris. 



R. pruinosa Speg. On Senecio jacobea. 



R. plantaginis El. et Mart. On leaves of Plantago major. (U.S. Am.) 



R. variabilis Fuck. On leaves of Digitalis AiidVerbascum. (U.S.America.) 



R. calcea Ces. On leaves of Glechoma hederacca. 



R. urticae C'es. On leaves of species of Urtica. (U.S. America.) 



R. pratensis Sacc. On Rwme.r Acctosa. 



R. rufibasis (B. et Br.). On Myrica Gale. 



Some of the more important North American species are : 

 Ramularia rufomaculans Peck. On the buckwheat (Fagopyrum esciil'it- 

 tum\ it has proved a somewhat injurious fungus. 



R. albomaculata Peck. On leaves of Carya atnericana. 



R. viburni E. et E. On leaves of Viburnum Lentago. 



R. celtidis E. et K. On leaves Celtis occidentalis, 



R. desmodii Cooke. On leaves of various species of Desmodium. 



R. brunnea Peck. On living Tussilago farfara. 



R. areola Atks. 2 This causes spots on the foliage of cotton. 

 " Spots amphigenous, pale at first, becoming darker in age : 

 irregular in shape, limited by the veins of the leaf, conidia in 

 profusion giving a frosted appearance to the spots. Conidio- 

 phores fasciculate, in small clusters distributed over the spots. 

 Conidia oblong, usually abruptly pointed at the ends" (Atkinson). 



R. Goeldiana Sacc. is said to kill leaves and twigs of Coffea 

 in I.ra/il. 



1 " Mahulie d. Artichauts," Bull* /in </< la soc. mycolo;/. dt France, 1892. 



2 Atkinson, Bo/tuiim/ Gazette, xv., 1890, p. 166. 



