32 
(2) Stroma not fully developed on Protea sp., Kentani, 19.10.12, Ê [5618], 
and on Protea abyssinica, Diepkloof, near Dullstroom, 19.9.10, Doidge [931]. 
This fungus is very variable in its external appearance, but after careful comparison 
I think there can be no doubt that Oligostroma protea Syd. on Protea flanagam [5163] 
is identical with Winter’s Didymella maculiformus. The variations mentioned in macro- 
scopic characters are due to variations in the thickness of the cuticle of the host, rather 
than to any variations in the structure of the fungus. 
Stromata amphigenous, forming discoloured, roughened areas on both sides of the 
leaf ; these are usually irregular in outline and up to 10 mm. in diam. or larger by con- 
fluence ; less frequently they are more or less circular and develop centrifugally. The 
stroma is reduced to an epidermal clypeus, 150-250 u diam. over each loculus and the 
short scattered hyphal strands or knots under it. Sometimes the loculi are closely crowded 
and the clypeus over adjoining loculi becomes confluent, forming a more or less continuous 
stromal plate, or the loculi may be more scattered, solitary, or in twos and threes. 
Loculi immersed, globose or ovate globose, 100-150 u diam., locular wall consisting 
of small brown cells and fused at the apex with the epidermal clypeus. Asci sessile, 
cylindrical-clavate or clavate, 75-1004. * 16-20 u, rounded at the apex, aparaphysate, 
eight-spored. Spores distichous, oblong-cuneate, unequally uniseptate, not constricted, 
24-28 » long; upper loculus shorter, but more broadly rounded or ovate 8-10 u long, 
7-9 ». broad, lower loculus longer and narrower, 15-19 u x 6-8 u, hyaline or sub-hyaline. 
50. Ophiodothella edax (B. and Br.) V. Hohn. 
Fragm. XII No. 630 (1910). 
Syn. Dothidea edax B. et Br., Journ. Linn. Soc., 1873, p. 135. 
Ophiodothis edax Sacc., Syll. Fung. II, p. 653. 
On leaves of Tephrosia elongata, Olifantsfontein, Pretoria Dist., 21.2.20, Pienaar 
[12822]. 
This fungus was originally described on leaves of Tephrosia suberosa from Ceyion. 
The South African specimen agrees with the description of the original, except in the size 
of spores. These are said to average 33-35 u x 2-8-3-2 u, but it is also stated that the 
asci are not quite ripe. It is probable, therefore, that the difference in the measurements 
of the spores is due to the fact that the present specimen is in a more mature condition. 
Stromata minute, black, punctiform, formed in groups on large yellow leaf ‘spots. 
There is an epidermal clypeus on both upper and under surfaces of the leaf, which is black, 
opaque, about 20 u thick in the lower epidermis, 25-30 u in the upper. There are 1-8: 
loculi in each stroma; these are flattened-spherical, 200-250 » diam., 150-200 vu. high, at 
base and apex united with the clypeus. The locular wall is 8-10 u thick and consists 
of hyaline very much flattened cells. Asci numerous, aparaphysate, eight-spored, thin- 
walled, pedicellate, clavate-ellipsoid, 7O-BO u x 10-13 u. Spores parallel, filiform, con- 
tinuous, hyaline, straight or curved, thin- walled, cylindrical, somewhat attenuated towards 
the blunt ends, 45-60% x 3-3-3 u. 
