E-Flora BC: Electronic Atlas of the Flora of British Columbia

Summary:
Features include 1) resupinate growth on wood, 2) waxy fruitbodies that are cream to ocher, often with reddish, greenish or brownish areas, the surface with conic teeth up to 0.03cm long, the margin not distinct, 3) spores that are oblong, smooth, inamyloid, and colorless, 4) cystidia of 2 types: a) halocystidia, smooth with a bladder-like swelling at the tip, and b) astrocystidia, smooth and pointed with a star-like tuft of crystals, and 5) a monomitic hyphal system, the hyphae with clamp connections.

Resinicium bicolor has been found in BC, OR, ID, AB, MB, NB, NF, NS, ON, PQ, SK, AZ, CO, FL, GA, IA, LA, MA, MI, MN, MS, MT, NC, NM, NY, and TN, (Ginns). It occurs in all forested parts of Scandinavia (Eriksson). It has been found in Switzerland and in Asia, (Breitenbach).

Fruiting body:
resupinate, attached tightly, forming patches several centimeters to decimeters across, thin, consistency wax-like (brittle when dry); cream to ocher, "often also with slight reddish, greenish, or brownish spots"; irregularly densely verrucose-odontioid, teeth up to 0.03cm long "and extreme tips sometimes colored dark brown"; "thinning out at the margin", (Breitenbach), resupinate, closely adnate [firmly attached], effused [spread out], thin, in the living state ceraceous [waxy]; whitish or cream, "sometimes with a red tint and rather often greenish from overgrown green algae", darkening when old "and may turn brownish in patches"; odontioid, usually with small, conic teeth, scattered or more crowded, "in more vigorous fruitbodies the teeth may be bigger", giving a more hydnoid appearance, under a 50x lens "the teeth often showing an apical tuft of sterile hyphae", in older specimens turning brown, especially when touched; margin usually indeterminate and colored as the spore-bearing surface, (Eriksson), spore deposit white (Buczacki)

Microscopic:
SPORES 6-7.5 x 2.5-3.5 microns, irregularly elliptic, "flattened on one side and sometimes slightly curved", smooth, inamyloid, colorless; BASIDIA 4-spored, 12-23 x 5-9 microns, clavate, with basal clamp connection; CYSTIDIA of 2 types 1) halocystidia smooth with bladder-like swelling at tip, 2) cystidioles smooth and pointed with star-like tuft of crystals; HYPHAE monomitic, 1.5-4 microns wide, with clamp connections, (Breitenbach), SPORES 5.5-8 x 2.5-3.5 microns, oblong, adaxial side straight or slightly convex, smooth, inamyloid, acyanophilic, thin-walled, usually without oil droplets; BASIDIA 4-spored, when young clavate, 15-25 x 4-6 microns, with basal clamp connection; CYSTIDIA of 2 types, both as a rule numerous: 1) halocystidia which are capitate, with a distal, thin-walled bladder, 10-20 microns wide, that contains "resinous or oily grains or drops", and 2) astrocystidia, from hyphal ends narrowing into a peg, bearing a star-like cluster (about 10 microns across) of radially arranged crystals; HYPHAE monomitic, 2-3 microns wide, thin-walled, fairly densely septate and with clamp connections at all septa; in the center of the teeth packed in parallel fashion, "joined by anastomoses, and continuing into the apical tuft of sterile hyphae"; "hyphae of the thin subiculum densely branched and intertwined", (Eriksson)