78 
On ripe Lemons, imported into South Australia from New 
South Wales, September, 1898 (Quinn). 
The Lemons are sometimes rough all over with the hard 
excrescences, and thereby rendered unsaleable. 
The solitary continuous conidia indicate that this form 
approaches nearest to Ovularia. The vegetative phase is most 
abundant, at least at this season of the year, and conidia are not 
copiously produced. (Figs. 15, 16.) 
10. FALSE MELANOSE. 
(Cladosporium brunneo-atrum , n. sp.) 
Mycelium composed of a network of creeping hyphae of a 
greyish or greenish colour, and ultimately olivaceous, septate, 
constricted at septa, much branched, and branches often at right 
angles, average broad, reaching 8 p. 
Conidia produced at or near tho apex of short, septate, pro¬ 
jecting conidiophores, and similarly coloured at first, finally 
becoming brown, globose to elliptical, mostly simple, but also 
uniseptate, smooth, 8-10 x 5-7Jw., or 6i-74/t. diameter. On 
Oranges. July, 1898. Sydney, New South Wales. 
This is the cause of the so-called “ Melanose ” of Australia, 
which is simply one form of ‘‘scab.” The brown spots, or 
blotches, ultimately become blackish, and split up into numerous 
small areas, from the hyphae bursting through to produce their 
conidia. The conidia are at first colourless, ultimately almost 
chestnut-brown, and for the most part unicellular. 
It differs from C. sphacrospermum (Penzig) in the short, 
closely septate conidiophores, and in the brown not olivaceous 
conidia. 
It is said to occur on leaves and twigs in New South Wales, 
but I have not had an opportunity of examining specimens. 
(Plate I., and Figs. 17, 18.) 
11. LEMON-SCURF. 
( Cladosporium Jtir/'uraceum, n. sp.) 
Forming dingy-white patches on surface of Lemon, ultimately 
becoming dotted over with brownish-black spots. Tho dis¬ 
coloured portions readily peel off in minute flakes, and the Lemon 
becomes scurfy in appearance. Hyphae yellowish-green, septate, 
branched, regular or irregular, in breadth 4-o^/i. 
Conidia ovate to pear-shaped, lemon-yellow, continuous or 1- 
septate, not constricted at septa, pretty constant in size, 15-17 X 
8^-9-^ju. 
