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Page number:24 
Remarks (internal):This species is common and widely distributed throughout eastern North America on bark of living angiospermous trees, especially on Quercus and Ostrya (Lemke 1964b). Aleurodiscus oakesii also is reported from Arizona on bark of living oaks (Gilbertson & al. 1974). The isolates of A. oakesii studied differed in culture. The most recent isolates, FP 101813 and FP 101999, developed abundant hyphal swellings, especially on the submerged hyphae, while the older isolates had few or no swellings. Some isolates developed abundant fiber hyphae in both submerged and aerial mats while in other isolates such hyphae were absent. Although the distinction between fiber and generative hyphae is clear in some isolates, in other isolates the two hyphal types intergrade.  
Description type:Culture description 
Description:Aleurodiscus oakesii (Berk. & M. A. Curtis) Höhn. & Litsch.
Mats white, faintly zonate, some isolates moderately thin, appressed, subfelty to silky, other isolates moderately thick to thick, felty to woolly, a few isolates thick, raised and cottony-woolly, in all isolates agar surface firm to leathery at 2 wk, by 6 wk most isolates white, moderately thick to thick, appressed, felty to tomentose with scattered small mycelial aggregations, a few isolates developing very thick, raised and woolly mats; margins even to slightly uneven, appressed; odor absent or pungent at 2 wk, absent or sour at 6 wk; agar discoloration none at 2 and 6 wk; not fruiting by 6 wk. ; TAA mats at 2 wk white to Cream Color, moderately thin to thick, appressed to slightly raised, silky to downy, sometimes zonate; margins even, slightly raised. ; TAA ++++, tr-24; (13-)25-45; TyA -, brown or ++++, tr-14; tr-32
Microscopic characters: Marginal hyphae 2-5 µm diam, thin walled, simple septate, moderately branched. Submerged, surface and aerial hyphae (a) 3-6 µm diam, thin walled to slightly thick walled, becoming thick walled by 6 wk, simple septate, moderately to frequently branched, often branches short and tapering, some hyphae (Fig. 4) developing irregular swellings, these up to 9 µm diam; fiber hyphae 0.5-2 µm diam, slightly thick walled to thick walled, with scattered simple septa, frequently branched, with branches arising at right angles and tapering to apices, often slightly swollen at branch points, absent or abundant at 2 and 6 wk.
MEA (tr-)20-35; (27-)40-75; GAA ++++, 0-tr
Sexuality: Presumed homothallic (Boidin & al. 1968, p.57).
Cultural descriptions: Boidin & al. (1968, p.55); Stalpers (1978, p. 204).
Species codes: 2. 6. (8). (26). (27). 32. 36. 38. 46-47. (53).54. (57). 2. 6. 8. 32. 36. 38. 45.54. (57). (66?). (Boidin & al. 1968, p.55).


 
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