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Page number:269 
Remarks (public):Aleurodiscus penicillatus is characterized by globose echinulate amyloid spores and the more or less penicillate arrangement of the hyphoid processes at the apex of thin-walled acanthophyses. Thin-walled acanthophyses of this type are also found in A. fruticetorum W. B. Cooke, but this species differs in possessing smooth spores and a dimitic hyphal system (Lemke, 1965). A. penicillatus has been collected on numerous conifers all across the northern part of North America but has never been reported south of New York State. The lack of specimens from the southern Appalachians is undoubtedly due to the lack of collecting in this region. Collecting on conifer substrates in the southern Appalachians will certainly result in additional collections of this species from the area. It is an example of the northern flora extending along the Appalachian chain into the southern Appalachians. 
Description type:Non-original description 
Description:Aleurodiscus penicillatus Burt, Ann. Missouri Bot. Gard. 5: 201, 1918. (Figs. lb, 3 a f)
Basidiocarps (Fig. 1b) effused, corticioid, beginning as small patches, becoming irregularly confluent, up to 3 x 0.5 cm in extent; up to 0.5 mm thick, smooth, cream-buff to cream color, somewhat cracked, pruinose under a lens; margin irregular, pruinose, abrupt.
In section 350 µm thick; hyphal system monomitic; subiculum a textura intricata, hyphae (Fig. 3e) 2-3 µm diam, thin-walled, hyaline, septate, smooth or with scattered crystals, with clamps; catahymenium composed of acanthophyses, cystidia (pseudocystidia), paraphysoid structures, and basidia; acanthophyses (Fig. 3c) cylindrical to clavate, 30-100 x 5-15 µm, thin-walled, hyaline, clamped at base, with hyphoid processes protruding from apex, processes up to 6 x 1 µm; cystidia (Fig. 3b) arising in subiculum, clavate, often moniliform or variously constricted at apex, thin-walled, hyaline, clamped at base, imbedded or protruding up to 10 µm, often containing a yellow globule or crystalline inclusion; paraphysislike structures (Fig. 3f), simple or branched, 2-2.5 µm diam, smooth, clamped, hyahne, thin-walled; basidia (Fig. 3a) clavate to nearly cyhndrical, 50-90 x 15-23 µm, thinwalled, hyaline, 4-sterigmate, sterigmata up to 16 µm long, 4-5 µm wide at base; basidiospores (Fig. 3d), globose to subglobose, echinulate, l6-[9 x 14-18 µm, thick-walled, with noticeable apiculus, amyloid, acyanophilous.
Specimen examined. HHB 2287 on dead Tsuga canadensis (L.) Carr. (eastern hemlock) twigs, Cullasaja River at Turtle Pond Rd., Nantahala Natl. Forest, Macon County, North Carolina (CFMR).
 
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