E-Flora BC: Electronic Atlas of the Flora of British Columbia

Summary:
Features include a small cup with a dense covering of white hairs on outside and margin, yolk-yellow to orange upper surface, short stem, growth on bark of conifers (especially Ponderosa pine in the Pacific Northwest), and microscopic characters including small round spores.

Lachnellula suecica is found from ON to ID, MT and CO, (Seaver), Switzerland (Breitenbach), and Finland, Iceland, Norway, and Sweden, (Hansen). There are collections from BC at the Pacific Forestry Centre and (as Lachnellula chrysophthalma) at the University of British Columbia. Haines(1) included it (as Lachnellula chrysomphalma) after examining material from Goose Lake ID (note the discrepancy in hair length from Seaver), and says "it is believed to occur abundantly on the ponderosa pines of the eastern slopes of the Cascade Mountains".

Upper surface:
0.1-0.4cm across, "cup-shaped when young, then irregularly distorted, saucer-shaped to flat and plate-shaped"; spore-bearing upper surface yolk-yellow, smooth; margin white hairy-felty, "often split or notched and strongly inrolled when dry", (Breitenbach), reaching 0.5-0.6cm, at first nearly spherical, expanding and becoming shallow cup-shaped; spore-bearing surface concave or nearly flat, orange-red, (Seaver), 0.1-0.6cm across, with orange spore-bearing surface, (Hansen), up to about 1cm across (Trudell), up to 0.7cm across, disc yellow to orange, fruitbody margins folding in on drying, "often forming into a cocked-hat shape, seldom concealing the entire disc", (Haines)

Underside:
white hairy-felty (Breitenbach), with dense covering of white hairs (Seaver), white to cream where exposed, but "covered externally with a dense, tangle mat of white hairs which persists even at maturity", (Haines)

Stem:
short (Breitenbach), short-stemmed, appearing as if no stem, (Seaver), short, up to 0.1cm x 0.05cm, (Haines)

Microscopic:
spores 4.5-5 microns in diameter, round, smooth, colorless, sometimes with droplets, uniseriate; asci 8-spored, 70 x 7-8 microns, weak reaction in iodine; paraphyses barely projecting beyond the asci, filiform [thread-like], sometimes forked toward the tips; hairs colorless, thin-walled, multiply septate, finely encrusted, tips rounded, (Breitenbach), spores reaching a diameter of 5-6 microns, round, uniseriate; asci reaching a length of 80 microns and width of 5-6 microns, cylindric, tapering in lower part into "a rather slender, stem-like base which is often forked"; paraphyses filiform, slightly widened in upper part, reaching a width of 2-2.5 microns, filled with oil droplets; hairs reaching a length of 50-60 microns and a width of 4 microns, cylindric, densely covered with minute granules, colorless, (Seaver), spores 4-6.5 x 4-6.5 microns; asci 50-80 x 5-8.5 microns, with amyloid pore; paraphyses exceeding the asci, filiform, 2-2.5 microns wide; hairs 2.5-4 microns wide, cylindric, colorless, (Hansen), spores 4.5-5.0 microns in diameter, round, relatively thick-walled, usually with a single large, round, refractive inclusion and several small ones; asci 8-spored, 60-70 x 5-6 microns, with a narrowed stalk, wall slightly thickened; paraphyses thread-like, up to 2 microns wide at widest point, up to 8 microns longer than asci, thin-walled, often with septum in lower part, "often with numerous, small, refractive, yellow inclusions", otherwise colorless; hairs up to 150 microns long and 2.5-3.0 microns wide, cylindric with obtuse apex, conspicuously roughened by small adherent granules measuring up to 1 micron, colorless, thin-walled, multiseptate, septa forming cells up to 25 microns long, (Haines)