81 
16. ANTIIRACNOSE OR BLACK SPOT. 
(Phoma citricarpa , n. sp.) 
Spots dark-brown, at first whitish or greyish towards centre, 
but may ultimately become of one uniform colour, round, sunken, 
solitary or confluent, varying in size from 1 mill, to 5 mm., and, 
when confluent, forming Jarge irregular patches (fin. or more). 
Hyphas permeating rind, hyaline, septate, branched, 4-5^/z. 
broad. 
Perithecia, solitary or in groups, sometimes circularly arranged, 
minute, black, but dark-brown by transmitted light, punetiform, 
globular, erumpent ; pore about 20p. diameter, although it may 
be somewhat elliptical, 100-120/t. diameter. Sporules hyaline, 
somewhat variable in shape, elliptical to ovate or even pear- 
shaped, with conspicuously granular contents, 8—11 x 4^-6/i., 
average 9), x 5£/i. (stained a light green by Potassium-iodide- 
iodine); basidia hyaline, slender, about 6//. long. 
On ripe or still green Oranges, Lemons, and Mandarins, winter, 
spriug, and summer. New South Wales. 
The round sunken conspicuous spots are generally of a ruddy- 
brown tint, and paler in the centre where the pustules are seated. 
This is a distinctive species in the small size of the perithecia, 
as well as in the sizo and shape of the sporules. (Plato II. and 
Figs. 32, 33, 34, and 186.) 
17. WITHER-TIP, ROOT-ROT, OR BLACK SCAB OF 
FRUIT. 
(Phoma ornnivorit , n. sp.) 
Perithecia on greyish or dingy black patches, minute, black, 
gregarious, slightly erumpent, firm, membranaceous, globose to 
sub-globose, dark brown by transmitted light, with papillate 
apical pore, lo0-160/x. diameter or less. 
Sporules hyaline, cylindrical, rounded at both ends, escaping 
in a mucilagiuous tendril, minute 3-3^- X 1-H/u. 
Common on fruit, leaves, stems, and roots of Oranges, Lemons, 
and Citrons. September, 1898—August, 1899. All the year 
round. Victoria, Now South Wales, South Australia (Quinn), 
and West Australia (Helms). 
This species resembles P. limonis (Thuem.) in the size of the 
sporules, but the perithecia are not pntellifonn nor immersed, and 
the habit is entirely different, being found on green twigs and 
leaves, stems, and roots, as well as on green and ripe fruit. 
Fruit .—The still green or ripe fruit is conspicuously scabbed, 
giving it either a dirty grey or dingy black appearance over the 
whole of one side, and causing little patches to flake off. 
3316. 
v 
