168 FUNGOID TESTS OF CULTIVATED PLANTS. 



attached to each other in chains of from six to ten cells. Whilst remain- 

 ing attached, the ends'of the conidia are flattened at the point of junction, 

 but when free they acquire a globose form (10 /.i diam.), with a thin 

 hyaline membrane, but with granular golden-yellow cell-contents. 



At present this has only been recorded in Britain, and is certainly 

 epiphytal, probably not at all injurious to the plant: at any rate it is very 

 curious. 



Grevillea, xii. 98; Sacc. Syll. vi. p. 633, x. p. 511. 



Two or three kinds of leaf-spot have been caused upon Jasmin-leaves 

 by imperfect fungi, but none of these have been recorded as British. 



Passion-flower Black Mould. 

 Zygosporium oschcoides (Mont.), PI. XV. lig. 23. 



This minute black mould was first discovered in Cuba, growing on 

 dead leaves, and was only regarded as a saprophyte, but recently it has 

 been recorded on leaves of Passijlvra quadrangular is, seemingly under 

 the impression that it was a parasite, and a new species, under the name 

 of Cladotrichum Passificrce (Pirn.). 



The fertile threads are erect, septate (70 x 3 /<), sooty-brown, inflated 

 and paler at the apex, at the base emitting a semilunar sporophore. 

 Conidia, oval or globose, produced singly or in pairs at the apex of the 

 sporophores (5/u diam. or 12 ^ long). 



The peculiarity is that the hyaline conidia are borne at the end of 

 curved club-shaped branches, which is sufficient to identify the species. 



This same mould has been found in Cuba and elsewhere on Screwpines 

 and Palms. 



/</. Chron. Dec. 5, 1885, p. 724, fig. 164; Sacc. Syll. iv. 1591; 

 < 'orda, 1< on. vi. 



Cactus Scab. 

 Diplodia Opuntia (Sacc). 



The injury caused by this fungus is sometimes severe, the black 

 outgrowths constituting the sterile portion of the fungus often 

 oov< ring a con liderable area, the surrounding tissue becoming discoloured. 

 The mycelium is distinctly localised, ami each scale is the outcome of an 

 independent infection. The Diplodia Eormof fruit is rare but* has occurred 

 on Phylloecu tvA at I L< worth. 



Ga ■ . An;-. 12. L905, p. L26, fig. 14. 



StEPHANOTIS Li:\l-si'(ii . 



Phyllosticta Stephariotidis (Grove), PI. XV. tig. 21. 



Tin Li tected on the Leaves of Stephanotis in 188(i, 



forming round or irregular spots, which arc bleached or whitened and 



surrounded h\ a thin dark brown line. The receptacles appear on the 

 upper Burface, and arc small, numerous, ami scattered over the spots, 

 nestlin ill the cuticle, which is pierced by the -mall orifice of the 



