Summary:
Datronia scutellata is recognized by the small black cap with a pale pore surface. Other features include a tough consistency, small pores, and large cylindric spores. The description is derived from Gilbertson(1).
Datronia scutellata has been found in BC, WA, OR, ID, MB, NB, NS, ON, PE, PQ, AZ, CT, FL, GA, IA, IN, ME, MI, MN, MT, NC, NH, NM, NY, OH, PA, TN, VT, and WV, (Gilbertson).
Cap:
up to 3cm x 1.5cm x 0.3-1cm, shelf-like or bent out from flat pore surface to form cap, semicircular to almost pendent (hanging by slender attachment) or broadly attached, tough, drying hard, annual; upper surface whitish at first, soon dark brown to black, margin often remaining paler than basal parts; at first velvety but soon bald and often slightly grooved in zones
Flesh:
0.1-0.3cm thick, dense; wood-colored to pale brown with a distinct black crust on top
Pores:
4-5 per mm, round to slightly angular, walls often finely farinose; white to buff or pale brown when old; tube layer up to 0.7cm thick, cork-colored to wood-colored
Microscopic:
spores 8-12 x 3-3.5 microns, cylindric, inamyloid, colorless, thin-walled; basidia 20-25 x 7-10 microns, broadly clavate, with basal clamp; cystidia none but cystidioles 20-26 x 7-8 microns, fusoid, with basal clamp; hyphal system trimitic: generative hyphae "with clamps, hyaline in context and trama, 2.5-4 microns wide, pigmented hyphae with clamps present on pileus surface"; skeletal hyphae 2-4.5 microns wide, solid, pale yellowish, binding hyphae of same width as skeletal hyphae but much more branched
|
