Summary:
Features include growth flat on wood with the orange-cinnamon to cinnamon pore surface exposed, cylindric curved spores measuring 3.5-5 x 1-1.5 microns, and scattered heavily incrusted, thick-walled cystidia. The description is derived from Gilbertson(1).
Junghuhnia collabens has been found in BC, OR, ID, AB, NS, ON, AZ, CO, LA, MN, MT, NH, NY, SD, and WI, and circumglobally in the conifer zone, (Gilbertson).
Cap:
growing flat on wood with pore surface exposed, spread out up to 20cm, "tough, drying light in weight and brittle", often partly separating from wood on drying, margin fertile to narrowly sterile, up to 0.2cm wide, "pale pinkish buff, finely tomentose", annual
Flesh:
subiculum less than 0.1cm thick, tough-fibrous, not zoned; light pinkish buff
Pores:
3-4 per mm, circular to angular, with thick entire walls that become thin and deeply torn; cinnamon or orange-cinnamon to vinaceous cinnamon; tube layer up to 0.5cm thick, colored as subiculum and continuous with it
Microscopic:
spores 3.5-5 x 1-1.5 microns, cylindric, somewhat allantoid (curved), smooth, inamyloid, colorless; basidia 4-spored, 10-13 x 4-5 microns, clavate, with basal clamp; cystidia frequent to rare, completely imbedded or projecting to 40 microns, 40-70 x 9-11 microns, clavate, partly to completely incrusted, thick-walled, hyphal pegs usually present; hyphal system dimitic, subicular generative hyphae mostly 2-6 microns wide, some near substrate up to 8 microns wide, "thin-walled, rarely branched, with clamps", subicular skeletal hyphae 2-6 microns wide, colorless, "thick-walled, non-septate, with rare branching", trama hyphae similar
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