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 On Potato Sucrose Agar (PSA). Colonies. After 4 days growth of isolates ranges from 4-7.2 cm diam., with a mean ñ SD = 6.25 ñ 5.58; mycelium abundant, variable in colour; aerial mycelium usually white with no pigments, or sometimes with yellowish white aerial mycelium and orange grey pigmentation, or sometimes pale yellow mycelium and light brown pigmentation, or exceptionally white aerial mycelium with grayish green pigmentation, or white aerial mycelium and white with deep blue pigmentation. On Potato Dextrose Agar (PDA). Colonies. After 10 days growth varies from 7.2-9.55 cm length, with a mean ñ SD = 8.35 ñ 6.05; aerial mycelium abundant, usually white with no pigments, sometimes pale yellow with golden yellow pigmentation, or light yellow with light brown pigmentation, or exceptionally with white aerial mycelium and white with grayish green pigmentation, or with white aerial mycelium and white with deep blue pigmentation; mycelium rapidly forming globose to oval, smooth or rough-walled "chlamydospores" usually singly, in pairs, or in short chains. Conidia. Of two types; macroconidia abundant in sporodochia, rather wide, straight, stout, 35-55 × 4.5-6 μm, 3- to 7-septate, each with a blunt and rounded pointed and somewhat beaked apical cell and a poorly developed or well-marked foot-shaped or rounded basal cell; microconidia abundant, oval, ellipsoid, reniform and fusiform, 8-16 × 2-4 μm, 0- to 1-septate, occasionally 2-septate, produced in false heads from rather long monophialidic conidiogenous cells. Notes. This species grows on Glycerol Nitrate Agar (G25N) with growth rate less than 2 cm diam., producing white or orange aerial mycelium and yellowish orange or orange gray or orange pigmentation; growth on mannitol medium results in yellowish or orange mycelium and orange pigmentation; growth on Czapek-Dox Iprodione Dichloran Agar (CZID) results in white aerial mycelium and light yellow to brown or brownish grey or dull green pigmentation; growth on Dichloran Chloramphenicol Peptone Agar (DCPA) exceeds 5 cm diam. 

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© Ahmed Abdel-Azeem

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