77 



27 x 13 micromillimetres and varying as follows: 11-14 x 22-31 

 micromillimetres. These somewhat elongated, but occasionally ellip- 



X400 



Fig. 85. Germination of the aerial spore-forms 

 found in connection with the Fleospora of 

 the fruit of the passion-vine, a, spore that 

 has fallen from an aerial hypha such as that 

 shown at the right; b, a secondary spore 

 produced in a water culture. 



Fig. 86. Sketch of Pleospora from the rind of a 

 passion-fruit. The spores shown, magnified 

 400 diameters, are just beginning to germi- 

 nate, the end cells starting first. 



soidal, spores were crenate in contour, and were transversely divided 

 about seven times, the middle four to five parts being muriformly 

 sub-divided. The polar cells were undivided. Sometimes there were 

 two cells in succession at the pole undivided. Their greenish yellow 

 transparency allowed the observer to see that the contents of the cells 

 were only slightly granular. 



The asci were about six times as long as broad, and the contained 

 spores were arranged in a spiral manner in two rows. Between the 

 asci were transparent colourless septate sterile hypha3 one third as 

 wide as the ascospores. 



On escaping into water the ascospores 

 seemed to be at first surrounded by a layer 

 of transparent and almost invisible gelatine. 

 These thin-walled ascospores were quick to 

 germinate in water, and it was the polar cells 

 that were the first to throw out hyphae, 

 though sometimes the other cells were quick 

 to follow suit. 



The perithecia were about seventy micromillimetres in diameter, 

 but it may be that this measurement is deceptive, as only one or 

 two ripe specimens were seen. The measurements were from ripe 

 perithecia. 



Faulty Leaves on the Passion-Vine. 



The leaves of the Passion-vine are sometimes imperfect in shape, the 

 imperfection being manifested in a torn appearance, more especially at 

 the edges. Occasionally there are holes, as in the shot-hole disease of 

 the apricot. Such leaves are also somewhat distorted, but not so 

 much so as in the disease I -have named " Woodiness." The diseased 

 leaves look as if pieces had been torn out of them. 

 < If the apparently torn edges are examined with a magnifying glass, 

 it will be found that instead of being torn they are eaten away by a 

 fungus, the fungus itself, or at least the fruiting part of it, being visible 

 when looked at against a strong light. On certain parts of the 



Fig. 87. Fusanum of the 

 passion-vine stock. 



