175 



most closely with Montemartini's description, so that the 

 above name is givon them (McAlp., 1897, p. 16). 



ASCOMYCETES. 



Erysiphe cichoracearum, DC. On Senecio vulgaris, L. 

 Glencoe, South-East, Dec. 9, 1916, G. Quinn. 



On living leaves and stems of Cucurbit a pepo, L. Mur- 

 ray Bridge, Feb., 1917. Also common in gardens in Adelaide 

 on the marrow and other types of Cuciirhita. 



Not listed by Mc Alpine (Osborn, 1918). 



Aster IN A baileyi. Berk, et Br. On living leaves of 

 Hakea rostrata, F. v. M. Belair, Sept., 1920, G. S. And 

 on Hakea ulicina, E-. Br. Forest of Kuitpo, May, 1922, G. S, 



This is a common fungus, and has been present here for 

 years, though not recorded for South Australia as yet. A 

 specimen of H . ulicina, in the Herbarium of the University 

 of Adelaide, labelled ''Aldgate, 1895, O. E. Menzel," is 

 affected with it. The Hakeas above are new host species. 

 (McAlp., 1895, No. 1728). 



Seynesia banksiae, McAlp . On the upper surface of 

 living leaves of Banksia ornata, F. v. M. Forest of Kuitpo^ 

 May, 1922, G. S. (McAlp., Proc. Linn. Soc. N.S. Wales, 

 1903, p. 553). 



Parodiella banksiae, Sacc. et Bizz. On leaves of 

 Banksia marginata, Cav. Ambleside, May, 1922, G. S. 



This fungus, known as Banksia Freckle, occurs on the 

 under surface of the leaves, chiefly the lowest or innermost 

 leaves, slightly "languid," as McAlpine says. Although it 

 has not been recorded for South Australia before, it has been 

 present here for years. A specimen of Banksia marginata, 

 in the Herbarium of the University of Adelaide, labelled 

 "Aldgate, 1895, O. E. Menzel," is infected with it (McAlp. 

 1895, No. 1741). 



OiDiUM, on apple. On living leaves and twigs of Pyrus 

 Mailus, L. Upper Sturt, Jan., 1921, G. S.; Houghton, Mar.^ 

 1921, G. S. 



At Houghton the Oidium was unusually plentiful on big- 

 leafy trees 12 to 15 ft. high which had only been single- 

 worked, and were probably on their own roots. 



The perfect stage of this Oidium was not found. There 

 are four apple mildews — Podosphaera oxycanthae, Podo- 

 sphaera leucotricha, Podosphaera tridactyla, and Sphaero- 

 theca mali — over which there has been considerable confu- 

 sion; until the perithecia are found, therefore, this Oidium 



