Summary:
Features include fruitbodies the grow flat, or shelf-like to shingled on conifers, tough caps that are whitish discoloring darker, small round to angular pores that are white to wood-colored discoloring darker, and microscopic characters including arboriform binding hyphae. The description is derived from Gilbertson(1).
Dichomitus squalens has been found in BC, WA, OR, ID, AB, MB, NB, NF, ON, PQ, SK, YT, AK, AZ, CA, CO, CT, LA, MD, ME, MI, MN, MS, MT, NE, NH, NJ, NM, NWT, NY, PA, SD, VA, VT, and WI, (Gilbertson).
Cap:
shelf-like, single to imbricate [shingled] or with cap(s) bent out from fruitbody growing flat on wood with pore surface exposed, or entirely flat (may spread out up to 100cm or more), caps usually triquetrous, "up to 3cm wide, 1-7cm long", 0.3-1.5cm thick at base, tough and corky drying hard, annual to reviving a second year; "upper surface white to cream, with age discolored and ultimately bay to almost blackish from the base and then with a very thin cuticle, at first finely tomentose, later glabrous, azonate or slightly concentrically zonate, in dry condition often slightly wrinkled radially, margin white, narrow to glabrous, discolored by age"
Flesh:
0.1-0.4cm thick, dense; white
Pores:
4-5 per mm, round to angular, thin-walled; white to wood-colored, when old "more yellowish or discolored in light brown and gray shades, often unevenly"; tube layer up to 1cm thick, colored as pore surface or paler
Taste:
slightly bitter
Microscopic:
spores 7-10 x 2.5-3.5 microns, cylindric to oblong-elliptic, smooth, inamyloid, colorless, thin-walled; basidia 15-22 x 6-8 microns, clavate; cystidia absent; hyphal system dimitic: generative hyphae 1.5-4 microns wide, thin-walled and colorless, with clamp connections, "arboriform and usually dichotomously branched binding hyphae predominant in the fruitbody, hyaline, thick-walled to solid, up to 7 microns wide in the main stems, tapering down to thin whip-like ends"
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