80 



Phyllosticta was abundant on the patch that had been removed from 

 this hole. The question, therefore,, naturally arises, are these fungi 

 new growths taking up the destruction where the Phyllosticta leaves 

 off, or are they spore-forms of the Phyllosticta ? In this connection 



X4-00 



Fig. 91. Alternaria spores connected with 

 shot-holes in apricot leaves. 



Fig. 92. Oospora-like 

 fungus connected 

 with shot-holes of 

 the apricot and 

 almond. 



X900 



a fact worth noting is that the Phyllosticta is a sub-cuticular form, 

 while the later forms are aerial in their fructification. It seems possible 

 that the new conditions, brought about by the falling away of the circle 

 of dead tissue, cause the mycelium to produce new spore-forms. It is 

 probably incorrect to attribute all the damage to the Phyllosticta form. 

 On being cultivated in a moist chamber the Oospora-like fungus, 

 found on the margins of the shot-hole of the apricot, grows in precisely 

 ^the same manner as the fungus found corroding the margins of the 

 leaves of the Passion-vine. A careful comparison shows absolutely no 

 -difference in form, and, moreover, the rate of growth, &c., are the same. 



A Ripe-rot Fungus on Passion-vines. 



A Gloeosporiumj or Ripe-rot fungus, was observed growing on 

 Passion-vine leaves. Passion-vine leaves that 

 showed at the time of gathering only Macro- 

 sporium and accompanying pustules already 

 described., were placed on moist blotting paper 

 in a moist chamber. In five days Gloeosporium 

 pustules were so well developed that the spores 

 were being " spouted " forth. The Gloeo- 

 sporium appeared separate from the other fungi 

 on the leaves, the spots being scattered over the 

 tlamina of the leaf and on the veins. The pustules had the same ap- 

 pearance as the Gloeosporium of the apple, the mass of spores being 

 salmon-coloured or brownish, and the pustules being of the same size. 

 The measurement of ten spores taken at random are given above, 

 the average falling at 6*4 x 16'2/u,, and the range in size being repre- 

 sented by the figures 5-6-7' x 12'6-17'5/x. 



The elongated, slightly greenish, straight or somewhat curved spores 

 had a clearly defined vacuole near the centre ; if the spore was lying 

 -,so as' to appear curved the vacuole often had a lateral position on the 

 dncurved-side on the spore. The granulation of the spores was coarse, 



