Summary:
Features include 1) small size, 2) a chalk-white, convex, slightly grooved cap that appears pruinose under a lens at first, 3) pliant flesh, 4) adnate, distant, broad, white gills, 5) a chalky white pruinose stem, 6) growth on hardwood debris, 7) a white spore deposit, and 8) elongate, smooth, amyloid spores. The description here is for Mycena kalalochensis by Smith(1) (except where otherwise noted) which is found in WA, the same as Resinomycena kalalochensis (Redhead(17)), Resinomycena saccharifera ssp. kalalochensis (Redhead(9)) and Resinomycena saccharifera (Redhead(6)).

Cap:
0.3-0.8cm across, "convex, remaining broadly convex, margin incurved at first", spreading when old; chalk-white, not hygrophanous; appearing pruinose under hand lens at first, bald and uneven when old but remaining chalky, slightly sulcate [grooved] when mature

Flesh:
membranous and pliant, not reviving

Gills:
adnate, distant, 10-12 reaching stem, broad, 2 tiers of subgills; white; edges pruinose

Stem:
0.3-0.7cm long and less than 0.05cm wide, equal or with slightly flanged base; chalky-white; base strigose (hairy) and remainder pruinose like cap

Veil:
[none]

Odor:
not distinctive

Taste:
indistinct (Buczacki)

Microscopic spores:
spores 8-11 x 5-6 microns, elliptic, smooth, distinctly amyloid; basidia 4-spored, pleurocystidia present but buried in the hymenium and difficult to locate, 22-30 x 5-9 microns, "narrowly fusoid-ventricose or some with irregular walls", cheilocystidia "very conspicuous, forming a sterile band", 36-62 x 6-12 microns, "somewhat fusoid to subcylindric or nearly filamentous", colorless, the walls often irregular; cap surface a turf-like covering of upright pileocystidia and filamentous projections, the pileocystidia 32-46 x 8-12 microns, "clavate to ventricose, the apex often subcapitate", filamentous cells 3-4 microns wide, "branched or variously contorted, no incrustations seen"; caulocystidia similar to pileocystidia, (Smith), spores 7.8-10.8 x 3.8-4.8 microns, elliptic to obscurely fusoid or occasionally obovoid, smooth, amyloid, colorless, thin-walled, with a prominent apiculus; basidia 4-spored, 24-25 x 7.5-8.0 microns, "clavate to obscurely utriform", with clamp connection; cheilocystidia abundant, forming a sterile edge, 31-48 x 5-6.5 microns, less variable than the pileocystidia, mostly narrowly cylindric to slightly clavate, occasionally forked or branched, occasionally with an apical finger-like projection, scantily resinous; cap epicutis "an erect to suberect tangled turf of polymorphic cystidia", 25-50 x 3-8 microns, varying from cylindric to narrowly clavate, "usually capitate to subcapitate, often secondarily septate, scantily resinous oleocystidia to variously branched to narrow dendroid and antler-like forms, which lack resinous exudates or contents", walls thin, colorless, smooth, with basal clamp connections; caulocystidia "similar to the pileocystidia but only scantily resinous like the cheilocystidia"; clamp connections mentioned for basidia, cap epicutis, cap trama, (Redhead(17)), the European subspecies saccharifera has spores (9.5)11-13 x 4-6 microns compared with 7.8-11(12) x 3.8-5(6) microns for subspecies kalalochensis, (Redhead(9) but Redhead does not appear to maintain the separate subspp. later in Redhead(6))

Spore deposit:
white (Buczacki)

Notes:
Resinomycena saccharifera was examined from BC, WA, OR, and CA, (Redhead(17)), and reported also from Denmark, France, and the United Kingdom, (Redhead(6)).

EDIBILITY

Synonyms and Alternate Names:
Mycena kalalochensis Sm.
Mycena quisquiliaris (Joss.) Kuehner
Resinomycena kalalochensis (A.H. Sm.) Redhead & Singer