Vuilleminia beltraniae M. Duefias, Telleria & M.P. Martin,

Descripción original 
Etymology. Named after Esperanza Beltran-Tejera, mycologist, botanist, colleague and friend, for her contribution to the knowledge of Macaronesian mycobiota.
Basidioma resupinate, adnate, at first orbicular, forming small patches, then confluent and effused, crustaceous to ceraceous when dry; hymenophore smooth, pruinose under the lens, finely cracking in older parts, white to yellowish (86.1.Y; Kelly& Judd 1976 ), with age darker (83.brill. Y—82.V.Y); margin& Judd 1976 ), with age darker (83.brill. Y—82.V.Y); margin finely fibrillose in young specimens, later abrupt, not especially differentiated. Hyphal system monomitic; hyphae thin to thickwalled, richly branched, with clamps, 3—4 um wide, those of the subiculum mostly horizontal, loosely interwoven, those of the subhymenium vertical, densely interwoven; abundant crystals especially in the old fruitbodies. Hyphidia numerous, sparsely branched, thin to thick-walled, encrusted with small crystals in the apex. Cystidia of two kinds: 1) tubular, capitate, thin- to moderately thick-walled, projecting in the hymenium, 70—130 x9—13 um; 2) cylindrical to fusiform cystidia, thin- to moderately thick-walled, normally included, 80—160 x (6—)8—14 um. Basidia claviform, more or less pedunculated, sinuous, (55—)65-—100 x6—12 um, with four sterigmata and basal clamp. Spores allantoid, adaxially concave, (12—)14—23 x (4.5—)5—7 um, Q = 2.7, thin-walled, smooth, non-amyloid, non-cyanophilous, often with adventitious septa, with oil drops in the protoplasm.
Habitat & Distribution — Most of the specimens examined were found on species of Cistus. Studied samples are from France, Iberian Peninsula, Canary Islands, and Morocco.