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

Summary:
Features include 1) resupinate growth on wood, 2) whitish or cream or sordid ochraceous color, under a 50x lens flocculose or granular when young, bristly from projecting cystidia, the margin indeterminate to filamentous, 3) spores that are allantoid, smooth, inamyloid, and colorless, 4) basidia that are subclavate, slightly stemmed, thin-walled or with slight wall thickening, 5) cylindric cystidia, the amyloidity varying from a strong blue to a grayish reaction, dissolving in KOH, generally encrusted with crystalline material, thick-walled with a capillary lumen that expands abruptly to the slightly narrower, thin-walled, blunt apex, and 6) a hyphal system that is normally monomitic, the hyphae with clamp connections, thin-walled to moderately thick-walled, but in some specimens thick-walled skeletal hyphae are found in a layer next to the substrate, weakly amyloid and seemingly without septa. The online Species Fungorum, accessed August 27, 2020, gave the current name as Tubulicrinis glebulosus (Fr.) Donk.

Tubulicrinis gracillimus has been found in BC, WA, OR, ID, MB, NS, ON, PQ, AZ, CA. CO, IL, ME, MI, MT, NC, NE, NH, NJ, NM, NY, VT, and WI, (Ginns), as well as Denmark, Finland, Norway, and Sweden, (Hjortstam), and Switzerland and Asia, (Breitenbach).

Fruiting body:
resupinate, effused [spread out], in most specimens relatively thick, up to 0.025cm thick or more, "at first discontinuous then continuous and widely spread" over the substrate; whitish or more commonly cream to sordid ochraceous; in young parts minutely flocculose or granular (under 50x lens), "especially when dried cracking in small and irregular pieces", distinctly pilose from projecting cystidia; margin mostly indeterminate, (Hjortstam), resupinate, attached tightly to substrate, forming thin, continuous patches several centimeters across, consistency thin-membranous, wax-like; whitish to cream; smooth, under a 10x lens finely hispid [bristly] from cystidia; margin filamentous, (Breitenbach)

Microscopic:
SPORES (6)7.5-8.5(9) x (1.5)1.75-2(2.25) microns, allantoid, smooth, thin-walled, variation in size noted, between normally 6-8 microns long up to 8-10 microns long; BASIDIA 4-spored, 20-25 x 4-4.5 microns, "in a fairly dense palisade, clustered relatively loose", subclavate, "thin-walled or with slight wall thickening", slightly stemmed, inamyloid, with basal clamp connection; CYSTIDIA cylindric, robust, generally 100-200 microns long and 6-10 microns wide in the middle part, "narrowing to the obtuse and slightly contracted thin-walled apex, generally encrusted with crystalline matter, capillary lumen narrow, expanding more or less abruptly at the apex, amyloidity variable from a very strong blue to a greyish reaction"; HYPHAE normally monomitic but sometimes with thick-walled skeletal hyphae; generative hyphae 2-2.5(3) microns wide, "arranged in a dense tissue, inamyloid", thin-walled to moderately thick-walled, septa with clamp connections, skeletal hyphae occurring in some specimens forming a thin layer next to the substrate, 2.5-3 microns wide, weakly amyloid, thick-walled and seemingly without septa, (Hjortstam(6)), SPORES 6-8 x 1.5-1.8 microns, cylindric, slightly allantoid, smooth, inamyloid, colorless; BASIDIA 4-spored, 15-20 x 4.5-5 microns, clavate, with basal clamp connection; LYOCYSTIDIA 105-140 x 8-12 microns, +/- cylindric with blunt tip, weakly amyloid, dissolving in KOH, thick-walled, lumen at the tip enlarging abruptly, dissolving in KOH; HYPHAE monomitic, 2-4 microns wide, thin-walled to thick-walled, septa with clamp connections, (Breitenbach)