. Bothalia. Botany. 7. Hysterostomina tenella Syd. Ann. Myc. XIII (1915), p. 228. Syn. Hysterostomélla tenella Syd. Ann. Myc. X (1912), p. 442. On Asparagus striatus, Despatch, near Uitenhage, , Doidge [1241]. On Asparagus sp., Kentani, , Pegler [2240]; , Pegler [2362]. Stroma flat, membranous, dull black, 2-10 mm. long, irregular in shape, 70-80 [i high, on both sides of the leaf, or more or less clothing the stem. Loculi very closely crowded, irregularly arranged, dehiscing by a longitudinal slit; covering membrane radial, dark brown to black, opaque, formed of hyphae 3-4
. Bothalia. Botany. 7. Hysterostomina tenella Syd. Ann. Myc. XIII (1915), p. 228. Syn. Hysterostomélla tenella Syd. Ann. Myc. X (1912), p. 442. On Asparagus striatus, Despatch, near Uitenhage, , Doidge [1241]. On Asparagus sp., Kentani, , Pegler [2240]; , Pegler [2362]. Stroma flat, membranous, dull black, 2-10 mm. long, irregular in shape, 70-80 [i high, on both sides of the leaf, or more or less clothing the stem. Loculi very closely crowded, irregularly arranged, dehiscing by a longitudinal slit; covering membrane radial, dark brown to black, opaque, formed of hyphae 3-4 [l 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, 45-60fx X 16-20 [jl. They do not react to iodine. Spores dark brown, strongly constricted, cells spherical, sub-equal, elliptic-oblong, rounded at the ends, 13-16 \l x 6-8 [/.. Hypostroma not well developed ; it can only be detected in the stomata in the form of pegs, 20-25 \l high and 14-16 \l thick, which do not penetrate into the intercellular Fig. 1.—Section through loculus of Macowaniella congesta, showing hypostroma. 8. MacOwaniella Doidge, no v. gen. Polystomellacearum. Stromata superficialia, radiato-contexta ex hypostromati epidermali et sub-epidermal oriunda ; loculis linearibus, rectis v. curvulis, inordinate nidulantibus. Asci paraphvsati' octospori. Sporae phaeodidymae. Mycelium superficiale ramosum, septatum. This genus differs from Hysterostomina in the presence of free mycelium, and from Lemhosiodoihis 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, , Doidge [1786]; Isipingo Beach,
Size: 2047px × 1221px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1921
