South African Microthyriaceae. 
249 
cell slightly lobed or hooked, 8-14 x 6-10 jx. Thyriothecia 120-130 /j. diam., 
flattened-hemispherical ; margin fimbriate ; dehiscence stellate ; composed 
of radiating hyphae 3-3"5 fx thick, cells almost cubical, about 4 ft long. Asci 
aparaphysate, broadly cylindrical or spherical, somewhat thickened round 
the apex, 26-32 x 20-24 /x. Spores conglobate, 2-celled, constricted, 15-19 
X 9-10 fi, brown, upper loculus slightly broader ; epispore very minutely 
scabrous at maturity. Pycnidia similar to the thyriothecia but slightly 
smaller ; conidia ovate, brown with a lighter medial band, 13-17 x 8-10 ft. 
On leaves of Mikania sp., Winkle Spruit, Natal, 28/5/15, Doidge, 9001. 
3. Asterina Combreti Syd. 
Engl. Bot. Jahrb. 1910, p. 264, on leaves of Combretum tavatense^ 
Kibwezi, British East Africa ; Herb. Syd. and Berlin, Die Gattung 
Asterina, p. 63, pi. iii, fig. 8 ; vii, 7. 
Hyphaster kutuensis (P. Henn.) in H. Baum, Ber. der Kunene-Zambesi- 
Exped. 1902, p. 169. 
Asterina (Dimerosjporiwn) Jcutuensis (P. H.) v. Holm., Fragm. z. Mykol. 
xii, no. 599, on Comhretum Baumii, East Africa. 
Asterina Combreti var. kutuensis (P. Henn.) v. Hohn., Die Gattung 
Asterina, p. 63. 
Plate XIII, fig. 8. Slides XXIII, 19, 20 ; XXXI, 16; XXXIII, 16. 
Amphigenous, mostly epiphyllous, forming orbicular or indefinite spots 
2-6 mm. diam. ; mycelium delicate, undulating ; hyphae light brown, branch- 
ing irregularly and anastomosing, 3-4'5 ft thick, less frequently up to 5 ft 
thick, cells 16-20 ft long ; hyphopodia alternate briefly stipitate, 8-14 x 4-5 ft, 
upper cell slightly lobed or curved. Thyriothecia gregarious, flattened- 
hemispherical, 140-180 ft diam., composed of radiating hyphae about 3 ft 
thick, cells rectangular 4-7 ft long, the central ones almost cubical, cells 
longer towards the fimbriate margin ; dehiscence stellate. Asci globose- 
ovate, 28-40 X 28-32 ft, 8-spored, aparaphysate. Spores conglobate, obloug, 
rounded at both ends, l-se^^tate, constricted, brown, 18-23 x 8-11 ^, upper 
loculas frequently somewhat broader, epispore minutely verrucose at maturity. 
Pycnidia resembling the thyriothecia but smaller ; conidia {AsterostomeUa} 
elliptical to pear-shaped, continuous, brown with a medial, hyaline band, 
18-24 X 9-13 ft. 
On leaves of Comhretum Kraussii, Woodbush, Zoutpansberg, 3/8/11, 
Doidge, 1773 ; Buccleuch, Natal, 20/4/16, J. M. Sim, 10152 ; Stella Bush, 
Durban, 19/4/18, Bottomley, 11378; Buccleuch, 23/3/16, Doidge, 9709. 
On Comhretum, sp., Winkle Spruit, Natal, 28/5/15, Doidge, 9004 ; 
Eikatli, Portuguese East Africa, Sept., 1918, Junod, 11731, 11732; Louis 
Trichardt, Transvaal, 8/4/19, PutteriU, 11829. 
Theissen (Die G-attung Asterina, p. 63) describes A. Comhreti Syd. with 
hyphae 4-5 ft thick, hyphopodia 8-10 ft long and spores 20-24 x 9-11 ft; 
