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Species Information
Summary: Features include a sulphur-yellow to gold yellow cup or disc with a black toothed margin, a dark brown scurfy exterior, absent stem, and growth that is gregarious or tightly clustered on the ground.
Podophacidium xanthomelum is found from WA to NY, ON, PQ, and Europe. A collection by R. Outerbridge from BC is deposited at the Pacific Forestry Centre.
Upper surface: 0.1-0.4cm wide, lens-shaped to irregularly disc-shaped, without stem; sulphur-yellow to gold-yellow, smooth; margin distinctly brown lobed and notched, (Breitenbach), reaching 0.3-0.4cm wide, bright yellow with a slightly olive tint, surrounded with a dark brown or almost black laciniate border, (Seaver), up to 0.4cm wide, cup-shaped or obconic with small base, disc flat; sulphur-yellow; prominent black toothed margin (Dennis)
Underside: brown; scurfy, (Breitenbach), dark brownish or nearly black (Seaver), almost black with a minutely scurfy surface, (Dennis)
Stem: contracted at the base (Seaver) but without a stem (Breitenbach)
Microscopic: spores 12-13 x 5.5-6 microns, elliptic, smooth, colorless, with 2 drops; asci 8-spored, irregularly uniseriate, 115-148 x 8.5-11 microns, amyloid; paraphyses "filiform, sparsely septate, tips forked and bent", (Breitenbach), spores 10-17 x 5-6 microns, elliptic, the ends slightly narrowed, usually with 2 oil droplets; asci reaching 90-125 x 7-9 microns, clavate; paraphyses very slender, branched, (Seaver), spores 13-15 x 5-6, elliptic-fusiform, with two large oil droplets; asci 150 x 10 microns, cylindroclavate with long stalks, rather broad pore deep blue with iodine; paraphyses slender, about 2.5 microns wide at tips, (Dennis)
Habitat / Range
gregarious or tightly clustered, on bare or needle-covered or moss-covered ground in coniferous forests, more rarely in hardwood forests, (Breitenbach), thickly gregarious, occasionally a few closely crowded, on soil in coniferous woods, (Seaver)
