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).

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"

Notes:
Collections were examined from BC, PQ, NY, Sweden, United Kingdom, and Canary Islands, (Diederich(1)), and GA, MI, (Diederich(2)).

Synonyms and Alternate Names:
Godronia zelleri Seaver Mycologia 1.54166666666667 354 1945