108 
Conidia hyaline, fusiform, straight or slightly curved, acute at 
both ends, produced at the tips of the branches, contents finely 
granular, 1-3 septate, rather variable in length, but pretty con¬ 
stant in breadth, 29-41//. (stained canary-yellow by Potassium- 
iodide-iodine). 
On bark just above root of languid Orange trees, also on bark 
of Lemon trees. October-Fcbruary. Doncaster, near Melbourne. 
Trees were brought under mv notice as having some bark disease, 
and the above species was found splitting the bark and injuriously 
affecting the trees. It is evidently, at least in some cases, an 
injurious parasite, but it has only hitherto been observed on a few 
tiees. Peuzig is also inclined to regard it as a parasite, since it 
occurs on still living branches. As an instance of variability in 
size the two extremes (29-41//. long) wore found alongside of 
each other. 
Gibberella pulicaris (Sacc.) was seated upon it. (Figs. 167,. 
168.) 
69. CITRUS PHOMA. 
( Phoma citri , Sacc.) 
Forming densly crowded minute pustules giving a silvery-grey 
appearance to dead twigs. 
Perithecia sublenticular, depressed, immersed and slightly 
elevating cortex, finally erumpent and very black, with round,, 
scarcely papillate mouth, about 200//. diam. 
Sporules elongated elliptical to subfusoid, hyaline, bi*guttulate 
8J-9J, X 2?y-3//., basidia long, crowded, hyaline, guttulate, 
20-30//. 
On dead twigs of Orange practically all the year round. 
October to August. Armadale, near Melbourne. (Figs. 146, 
147, 148.) 
70. LARGE-SPORED PHOMA. 
(Phoma macroplioma , n. sp.) 
Minute, punctifonn, immersed pustules on dirty-grey to dirty- 
white bark of Orange twig. 
Perithecia gregarious, dark-brown by transmitted light, de¬ 
pressed globose, covered by epidermis with apical pore, texture 
parenchymatous, 150-180//., and pore averaging 18//. diam. 
Sporules hyaliue, oblong, rounded at both ends and often 
tapering slightly towards one end, with granular contents, 13-V 
14i x 3i-4^//., basidia cylindrical, continuous, simple, averaging 
15 x 2//. 
On branch of Orange and Lemon. October, 1893. Lancaster, 
Victoria. The discolouration of the bark is very marked, 
especially where adjoining the ordinary green tissue, and while 
