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 Add this item to the list   Boidinia Hjortstam & Stalpers
Page number:17 
Remarks (internal):This genus was segregated from Gloeocystidiellum principally because of the deviating texture of the basidiome, which was described as "separable, thin, porulose or furfuraceus, sometimes pellicular to soft membranaceous" or "loose consistency" (Hjortstam and Ryvarden 1988), and by the shape and ornamentation of the basidiospores, i.e., globose or subglobose, echinulate or verrucose, with a distinct apiculus. Only the type species was included initially. Jülich (1982), and Hjortstam and Ryvarden (1988) added suburniform basidia to the list of the principal characters of the genus. Jülich broadened the acceptable spore shapes to include "ellipsoid to reniform" and transferred G. subasperisporum to Boidinia. Hjortstam and Ryvarden emended the generic circumscription to include simple septate hyphae and transferred Gloeocystidium peroxydatum Rick and Corticium propinquum Jackson & Dearden to Boidinia. Earlier they (1987) had transferred Gloeocystidium lacticolor Bres. to Boidinia. Boidinia subasperispora was transferred to Amylosporomyces by Hjortstam and Ryvarden (1988).
Current status Boidinia contains four species: B. furfuracea, B. lacticolor, B. peroxydata, and B. propinqua. All, except B. lacticolor, occur in North America. The combination of characters which distinguishes Boidinia from other genera in the family are 1) globose to broadly elliptical, echinulate or verrucose, amyloid, basidiospores with a distinct apiculus, 2) suburniform basidia, 3) tubular to subclavate gloeocystidia, and 4) pellicular to soft-membranous texture and loose consistency of the basidiomes.
Description type:Non-original description 
Description:Boidinia Hjortstam & Stalpers
Mycotaxon 14: 76, 1982.
Type species Hypochnus furfuraceus Bres.
Basidiomes effuse, typically several cm long and broad, thin to 0.3 mm thick, membranous, in age some deeply fissured, yellow, pale yellow, buff, pallid to tan, lignicolous or corticolous. Hymenial surface smooth, but conforming to the topography of the substrate, furfuraceous to glabrous. Subiculum pallid to white, thin, dense. Hyphal system monomitic. Generative hyphae typically loosely arranged in a narrow layer parallel to and adjacent to the substrate, then becoming perpendicular to the substrate and slightly woven between the gloeocystidia and developing hymenium, distinct, some species with clamp connections, others with simple septa, 2-3.2 µm diam, the walls hyaline, thin or moderately thickened in some species, nonamyloid, acyanophilous. Gloeocystidia cylindrical or swollen basally, sinuous, typically 25-150 x 4-13 µm; the walls hyaline, thin; the contents oily to granular and hyaline to pale yellow in KOH, sulfo-positive or sulfo-negative. Basidia suburniform, about 14-38 x 4-6 µm with four sterigmata. Basidiospores broadly ellipsoid, globose or subglobose, about 4-6 x 3-6 µm, the walls echinulate to warty, hyaline, thin, amyloid, acyanophilous, with a distinct apiculus.
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