Summary:
Features include 1) resupinate growth on barkless conifer wood, 2) a somewhat gelatinous whitish to watery gray or livid fruitbody, the margin usually thinning out but often distinct, 3) spores that are suballantoid, smooth, and inamyloid, 4) basidia often with a gelatinous cover and also somewhat thick-walled, 5) cystidia that are awl-shaped, sometimes with septa, 6) a monomitic hyphal system, the hyphae embedded in a gelatinous matrix, with clamp connections, and 7) subiculum lacking or thin.

Microscopic:
SPORES 5-7 x 2-2.5 microns, suballantoid, smooth, inamyloid, acyanophilic, thin-walled; BASIDIA 4-spored (normally), 15-25 x 4-5 microns, narrowly clavate, "often with a gelatinous cover and also somewhat thick-walled", with basal clamp connection; CYSTIDIA numerous, 50-70 x 6-10 microns, subulate-acute [awl-shaped], a few obtuse, "walls at first thin then thickened, sometimes with adventitious septa"; HYPHAE monomitic: hyphae 2-3 microns wide, embedded in gelatinous matrix, thin-walled, with clamp connections, subiculum lacking or present as thin horizontal layer, (Eriksson)

Notes:
Phlebia segregata has been found in BC, MB, ON, PQ, and LA, (Ginns), as well as Finland, Norway, and Sweden, (Eriksson).

Synonyms and Alternate Names:
Griseoporia carbonaria (Berk. & M.A. Curtis) Ginns Mycotaxon
Hexagonia carbonaria Berk. & M.A. Curtis