Summary:
Tremella cetrariicola produces a minute, convex, reddish or grayish brown, brown, or black fruitbody with a waxy-gelatinous consistency, identified by microscopic characters including the refractive apiculus at the lower end of the spore. The description is derived from Diederich(1).
Collections were examined from BC, PQ, NY, Sweden, United Kingdom, and Canary Islands, (Diederich(1)), and GA, MI, (Diederich(2)).
Fruiting body:
0.04-0.18cm across, superficial, "convex, often with a constricted base, generally with a typical central depression", old fruitbodies sometimes tuberculate; "reddish or greyish brown, sometimes dark brown to black, pale brown when young"; consistency waxy gelatinous
Microscopic:
spores 6.5-8(10) x 4-5.5(6.5) microns, elliptic to almost limoniform [lemon-shaped], "with a distinct apiculus at the lower end of the spore", the apiculus refractive; basidia when mature, 2-spored or 4-spored, 12-18(22) x 7-11 microns, ellipsoid, septum longitudinal or oblique, rarely transverse, epibasidia 25-40 x 1.5-3 microns, elongate, cylindric; hymenium colorless, containing numerous probasidia, probasidial initials ellipsoid, often with attenuated base, rarely stalked, proliferations occurring through the basal clamp connection; hyphidia and cystidia absent; hyphae of context 2-4 microns wide, thick-walled, clamp connections not seen; haustorial branches frequent, mother cell 3.5-4 x 2-3.5 microns, subspherical to ellipsoid, haustorial filament 1-7 x 0.5 microns, rarely branched; anamorph "unknown, but numerous conidia-like cells of variable size have been observed in squash preparations"
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