^58 
Transactions of the JRoyal Society of South Africa. 
20. Asterina Excoecariae Doidge, sp. nov. 
Plate XY, fig. 25. Slides XIII, 11 ; XXXIY, 3. 
Ampliigenous ; thin, carbonaceous, not forming orbicular spots, but 
irregular areas up to 8 mm. diam. Mycelium effuse; hyphae delicate, rather 
pale, somewhat undulate, 3-3-5 fx thick, cells about 16 [x long, branches 
opposite, anastomosing ; hyphopodia sessile, alternate, or unilateral, various 
in shape, usually with 2-3 broad lobes, 6-7 x 6-8 Thyriothecia scattered, 
flattened-hemispherical, 100-120 /x diam., composed of radiating hyphae 
2'5-3/x thick; dehiscence stellate. Asci aparaphysate, evanescent, 8-spored, 
sub- spherical, sessile, about 35-40 /x diam. Spores conglobate, 1-septate, 
brown, constricted, 23-27 x 12-13-5 /x, the upper loculus larger; epispore 
scabrous at maturity. Pycnidia similar to the thyriothecia but smaller, 
60-70 fj. diam. : conidia ovate, brown, with or without lighter, but not hyaline, 
medial baud, 20-24 x 13-17 fx. 
On leaves of Excoecaria sp.. Winkle Spruit, Natal, 28/5/15, Doidge, 9009. 
21. Asterina undulata Doidge, sp. nov. 
Plate XY, fig. 26. Slide XXXI, 12. 
Epiphyllous, forming minute black spots 1-3 mm. diam, Hyphae 
pale-fuscous, undulating in more or less regular waves, 5-6*5 /x thick, not 
much branched, occasionally anastomosing, cells 18-22 /x long ; hyphopodia 
alternate, 1 -celled, broader than long, 5-6*5 /x high and 7-10 /x broad, 
irregularly lobed and cut, many almost palmate. Thyriothecia formed at 
the tips of secondary hyphae, the immature thyriothecia are fan- shaped ; 
mature thyriothecia flattened-hemispherical, gregarious, often becoming 
slightly angular by contact ; margin not fimbriate ; radiating hyphae 2*5-3 /x 
thick, cells 4-6 /x long. Asci aparaphysate, 8-spored, slightly thickened 
Tound the apex, ovate, 20-24 x 17-20 /x. Spores conglobate, narrow-ovate, 
brown, 1-septate, constricted, 13-15 x 6-8*5 /x, broadly rounded at both 
ends, upper loculus slightly broader. 
On leaves of Viola ahyssinica, Woodbush, Zoutpansberg, 4/8/11, Doidge, 
1769. 
Near A. Vero7iicae, from which it differs in the size and form of the 
liyphopodia. In A. Vero7iicae there is a fairly broad sinus between the lobes; 
in the present species the lobes are closely folded together, so that only one 
wall is visible between the two. There is also a difference in the size of the 
spores. 
22. Asterina polythyria Doidge, sp. nov. 
Plate XY, fig. 27. Slide XXIY, 8. 
Mostly epiphyllous, colonies black, crustaceous, 1-4 mm. diam. Mycelium 
forming a radiating fringe round the very numerous, closely-packed thyrio- 
thecia and pycnidia. Hyphae brown, sinuous, branches numerous, frequently 
