BY D. McALPINE. 101 



becoming holes, .5-10 mm. in diam. Perithecia minute, black, 

 punctiform, gregarious, slightly eruuipent, globose, membrana- 

 ceous, of parenchymatous texture, with papillate mouth (24 fi), 

 80-90 fx diam. tSporules generally slightly curved, sometimes 

 straight, hyaline (stained yellowish by >Schulze's solution), 3- 

 septate, acute at both ends, slender, average 28-31 x 2-2 J fi. 



Doncaster, Vic; on living leaves of Cryptostemma calendu- 

 iaceicm, R.Br. (Capeweed); Oct., 1902. 



This species differs from ,S'. martinii, Cooke, found in Victoria 

 on Bedfordia saliciua, DC. {== Senecio Bed/ordii, F.v.M.), in the 

 decided greyish-brown spots, and in the 3-septate sporules which 

 are very regularly 28 /x long. The Capeweed known also as "Cape 

 Dandelion," is a native of South Africa, and coming from a 

 climate somewhat similar' to our own, has spread rapidly and 

 extensively. But hitherto no fungus has been recorded on it, 

 either here or in its native home, and now this one has been 

 found associated with Ascochyta cryptostemnuc, McAlp. The 

 specific name has been given on account of the spots affected by 

 the fungus often becoming perforated. 



37. Septoria thelymitr.e, n.sp. 



Spots whitish, surrounded l^y dark margin, roughly oval, on 

 upper surface of leaf, 2-3 mm. long. Perithecia minute, black, 

 punctiform, erumpent, dark brown by transmitted light, depressed- 

 globose, membranaceous, with minute pore, up to 105 fx diam. 

 Sporules hyaline, rod-like, continuous, straight, very occasionally 

 slightly curved, 2-5-guttulate, 14-16 x 1-2 /x. 



Ringvvood, Vic; on languishing, partially brown leaves of 

 Thelymitra arUfafa, Lindl.; Oct., 1902 (C. French, Jr.). 



The perithecia and sporules generally agree with those of S. 

 posekensisj Sacc, which was found in Siberia on the languishing 

 leaves of an undetermined orchid; but the spots are olive-green 

 and on both surfaces, while in >S'. orchidearam, West.^the sporules 

 are 18-22 /n long and 6-8-guttulate. 



