95 
Sporules greenish in mass, hyaline individually, continuous, 
elliptical or ovoid, 1-guttulate, 3J-44 X 23/i., average 4 X Sp.; 
basidia hyaline, slender, filamentous, 5-5{>/t. long. 
On leaves of Orange. December, 1898. Armadale, near 
Melbourne. 
This is probably the cause of the withering of the tip which 
may extend considerably down the leaf, which ultimately readily 
falls. The withered portion is depressed beneath the green 
portion, so that the line of demarcation seems raised. 
It differs from P . omnivora (McAlp.) in the ovoid, 1-guttulate, 
sporules, which are altogether stouter. (Figs. 81, 82.) 
43. ORANGE AND LEMON PHOMA. 
( P/ioma hesperidum , n. sp.) 
Perithecia loosely gregarious, depressed globose or shortly 
elliptical in outline, slightly erumpent, black, dark yellowish- 
brown by transmitted light, membranaceous, of parenchymatous 
texture, with distinctly papillate mouth, average 150 X 130/*. 
Sporules hyaline, elliptical, 4^-5i X 2£/i. 
On Orange and Lemon leaves, and stem of Lemon affected with 
Collar-rot. April, 1899. Malvern, near Melbourne. It differs 
from j P. omnivora in the slightly larger spores and flattened 
perithecia, and from P. Jlaccida in t he smaller erumpent perithecia 
with different mouth. (Figs. 121, 122.) 
44. PINK-SPORED PIIOMA. 
(Phoma rhodospora , n. sp.) 
Minute, black, punctiform pustules on greyish-brown, irregular, 
slightly raised, often confluent scab-like patches on upper surface 
of leaf, and ruddy-brown blister-like patches on under surface. 
Perithecia sub-globose, depressed gregarious, slightly erumpent, 
dark brown to goldeu brown by transmitted light, of parenchy¬ 
matous texture, with minute knob-like projections, round mouth, 
about 160-170/*. diam. 
Sporules decidedly pinkish collectively, hyaline individually, 
minute, almost cylindrical, average 4 X 1 i/*. 
On lemon leaf also affected with Sooty Mould. February, 
1899. Doncaster, near Melbourne. 
It is not always easy to distinguish between Phoma with 
hyaline spores and Coniothyrium and Splmeropsis with fuliginous 
spores, on account of the gradations of colour which may occur. 
Thus the typical hyaline or sub-hyaline spores of Phoma may be 
hyaline and collectively green (P. incompta , Sacc. and Mart.) or 
