South African Microthyriaceae. 
257 
hemispherical, sub-opaque, 120-130 /x diam., composed of radiating hyphae 
3-3"5 fji thick, central cells almost cubical, about 4 /x long ; dehiscence 
stellate, margin fimbriate. Asci aparaphysate, almost spherical, 30-34 /x 
diam. Spores brown, 1 -septate, constricted, rounded at both ends, 20-23 X 
10-12 /X, upper loculus broader, epispore verrucose at maturity. Pycnidia 
similar to the thyriothecia but smaller, 80-100 fi diam. ; conidia ovate 
to pyriform, continuous, brown with an ill-defined, light, medial band, 
16-20 X 10-14 /X. 
On leaves of Jasminum torhwsum, MacOwan 1139. MacOwan's No. 1139 
in the herbarium of the South African Museum, Capetown, is Puccinia 
exhccuriens Thiim., and I could find on the leaves no trace of an Asterina 
mycelium. Theissen (Ann. Myc. x, p. 16) writes of the specimen in the 
Kew Herbarium : Das Original enthalt eine unreife Asterina mit hell- 
braunlichem Myzel, dessen Hyphen 4-5 /x dick sind und abwechselnde 
6-8 liohe, meist drei-lappige Hyphopodien tragen. Die unreifen Grehause 
enthalten noch keine Schlauche, nur braune, liyalin gegurtelte sog. Stylo- 
sporen von 18-20 /x Lange und 10-12 /x Breite {' sporidiis ellipticis, continuis, 
atrofuscis 18 -20 x 10' in der Originaldiagnose) Die Art ist zu streichen." 
Two more recent collections on Jasminum spp., however, show abundant 
thyriothecia and mature spores, and as the mycelium and conidia correspond 
with the above description I have re-described A. erysiphoides from these. 
On Jasminum miiltipartitum, Springfield, Natal, 14/7/15, Wood, 9018. 
On Jasminum angulare, Kentani, 8/11/15, Pegler (Pegler, 1868), 9161. 
On Jasminum sp., Alice, CP., 18/11/17, Doidge, 11978. 
19. Asterina Balansae (Speg.) Th. 
Die Grattung Asterina, p. 88. 
Seynesia Balansae Speg. P. Gruar. i, No. 297; ii, No. 130; Syll. Pung. 
ix, p. 1065. 
var. africana Sacc. 
Heclwigia, 1899, p. (133) ; Syll. Fung, xvi, p. 640 ; Die Gattung Asterina, 
p. 88. 
Plate XV, fig. 24. Slide XXIII, 4. 
Epiphyllous, forming opaque black spots 3-5 mm. diam. ; these are often 
so numerous that they coalesce. Mycelium dense, irregularly branched ; 
hyphae brown, sinuous, 4-6 /x thick, cells 12-15 /x long; hyphopodia alternate 
or unilateral, sessile, lobed, 4/x high and 7-8 /x broad. Thyriothecia fiattened- 
hemisplierical, 100-150 /x diam., composed of radiating hyphae 3-3*5 /x thick, 
, dehiscence stellate or irregular. Asci aparaphysate, 8-spored, spherical, 
25-40 /X diam., or ellipsoid, 28-45 x 18-24 /x. Spores conglobate, brown, 
1-septate, constricted, 17-22 x 8-10 /x ; the upper cell spherical and broader 
than the lower ; epispore minutely verrucose at maturity. 
On leaves of Uubus rigidus, Natal, Wood (Wood, 6464), 9507. 
