109 
the bark actually invaded by the fungus is of a dirty white, the 
surrounding tissue may become blackish. 
The grower who sent the specimen notes that it begins as a 
small black spot, and when it gets right round a limb the top 
dies off. It also attacks Lemons in the same way, and several 
have died apparently from this cause. 
The sporules are just on the boundary line between those 
recognised as belonging to Phoma and Macro phoma, and this is 
indicated in the specific name. (Figs. 149, 150, 151, 15*2.) 
71. MINUTE PIIOMA. 
(Phoma punctispora , n. sp.) 
Associated with and probably a spermogonial stage of Gib- 
berella pulicaris (Sacc.). 
Perithecia sub-globose, brown, without definite texture, minute, 
about 40/x. diam. 
Sporules very minute, hyaline, pimctifbrrn, about Ip, diam. 
(coloured very pale yellow by potassium-iodide-iodine). 
On stem of dying Lisbon Lemon, along with Fusarium and 
Gibberella pulicaris. October, 1898. Ardmona, Victoria. 
Very few perithecia were seen, but they might very easily be 
overlooked on account of their small size. The sporules are quite 
distinct from those of P. pulicaris , which are oblong, curved, and 
4 X l-ljju. (Fig. 153.) 
72. SEPTATE PHOMA. 
{Phoma sepio-basidia, n. sp.) 
Forming minute, gregarious, black points, on grey bark of dead 
Orange twig. 
Perithecia immersed, dark-brown by transmitted light, flattened- 
globose, membranaceous, very brittle, of parenchymatous texture, 
with circular mouth (34-37/*. diam.), closely incorporated with 
matrix at the base, up to 260-330/*. broad. 
Sporules hyaline, cylindrical to elongated-fusoid, usually bi- 
guttulate, 8-12 X 2-2ip.; basidia hyaline, at least 1-septate, 
crowded, filiform, tapering slightly at apex, 20-25 x U/*. 
On Orange twigs. July, 1899. Armadale, near Melbourne. 
Associated with Phoma omnivora (McAlp.), which is readily 
distinguished by its much smaller and erumpent perithecia. It 
differs from P. citri (Sacc.) and P . scabclla (Penz.) in the longer 
and narrower sporules, and the septate basidia. (Figs 154, 155, 
156, 157.) 
