7. Hysterostomina tenella Syd. 
Ann. Myc. XIII (1915), p. 228. 
Syn. Hysterostomella tenella Syd. Ann. Myc. X (1912), p. 442. 
On Asparagus striatus, Despatch, near Uitenhage, 23.3.11, Doidge [1241]. 
On Asparagus sp., Kentani, 19.3.12, Pegler [2240]; 3.6.12, Pegler [2362]. 
Stroma flat, membranous, dull black, 2-10 mm. long, irregular in shape, 70-80 yp. high, 
on both sides of the leaf, or more or less clothing the stem. lLoculi very closely crowded, 
irregularly arranged, dehiscing by a longitudinal slit; coverimg membrane radial, dark 
brown to black, opaque, formed of hyphae 3-4» thick. Hypothecium very thin, light 
brown. Asci paraphysate eight-spored, at first broad, oval, with conglobate spores ; later 
becoming elongated, with distichous spores ; very thick walled at the upper end, 45-60» x 
16-20 u. They do not react to iodine. Spores dark brown, strongly constricted, cells 
spherical, sub-equal, elliptic-oblong, rounded at the ends, 18-16 u x 6-8 u. Hypostroma 
not well developed ; it can only be detected in the stomata in the form of pegs, 20-25 p. 
high and 14-16 » thick, which do not penetrate into the intercellular spaces. 
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Fig. 1.—Section through loculus of Macowaniella congesta, showing hypostroma. 
8. MacOwaniella Doidge, nov. gen. Polystomellacearum. 
Stromata superficialia, radiato-contexta ex hypostromati epidermali et sub-epidermal 
oriunda ; loculis linearibus, rectis v. curvulis, inordinate nidulantibus. Asci paraphysati 
octospori. Sporae phaeodidymae. Mycelium superficiale ramosum, septatum. 
This genus differs from Hysterostomina in the presence of free mycelium, and from 
Lembosiodothis in the absence of sub-cuticular bands. The hypostroma is deep-seated in 
the tissues and is not sub-cuticular. 
MacOwaniella congesta (Wint.), Doidge. 
Syn. Lembosia congesta Wint., Syll. Fung. IX, p. 1105 [Wint. Exot. Pilze in Flora, 
1884, p. 9]. 
On leaves and stems of Carissa arduina, Lemana, Zoutpansberg, 14.8.11, Doidge 
[1786]; Isipmgo Beach, Natal, 21.5.17, Doidge [10155]; (Cango Valley, Oudtshoorn 
