682 THE FUNGI WHICH CAUSE PLANT DISEASE 



Ovularia Saccardo (p. 577) 



Hyphse, simple, or sparingly branched, erect, apically simple 

 or dendritically branched; conidia globose or 



rJ ovoid, solitary, rarely in short chains. 

 Over seventy-five species, all parasites. 

 O. necans (Pass.) Sacc. produces spots on 

 quince leaves in Italy and France; 

 O. cansegricola Hen. on economic species of 



Fig. 389.— Ovularia. Rumex; 



After Sorakin. Q. armoraclae Fcl. on horseradish; 



0. mteistltialis B. & Br. and O. ^rimulana Tkiim^. on. primrose 

 leaves; 



O. viciae (Frank.) Sacc. on Vicia; 



O. corcellensis Sacc. on Primula; 



O. alnicola Cke. on Alnus; 



O. rosea Fdl. on willow; 



O. villiana Mag. on lemons; 



O. syringae Berk, on lilac. 



O. citri B. & F. causes the white rust of lemons in Sicily.**^ 



A lemon disease in Australia has been credited by McAlpine ^^ 

 to O. citri McAlpine. 



O. medicaginis Br. & Cav. is on alfalfa; 



O. ezigua (W. Sm.) Sacc. on clover. 



Ovulariopsis Patouillard & Hariot (p. 577) 



Similar to Ovularia, except in the solitary, acrogenous, sub- 

 clavate conidia. 



Sterile hyphse creeping, conidiophores erect, simple, septate, -at 

 apex with a single 1-celled hyaline, subclavate conidiimi. 



A small genus of leaf parasites, in part conidia of the Erysi- 

 phacese (Phyllactinia). See p. 187. 



O. ulmorica Del. causes a mildew of mulberries.^^* 



Pellicularia Cooke (p. 577) 



Hyphae creeping, branched, septate, m a subgelatinous pellicle, 

 conidia sessile. 



