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

Mycena citrinomarginata Gillet
yellow-edged Mycena

Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.

Introduction to the Macrofungi

© Michael Beug  Email the photographer   (Photo ID #18169)

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Distribution of Mycena citrinomarginata
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Species Information

Section Calodontes (Smith), Section Fragilipedes (Maas Geesteranus); very variable in all its distinguishing features: color of cap, color of gill edge, spore size and type of cheilocystidia, but nevertheless one of the easiest Mycenae to recognize, (Smith), features include hygrophanous, striate cap that is grayish yellow to brownish yellow or bright yellow or even white, gills that are whitish or ash-gray, with edges that are yellow when cap is yellow, and sordid brown when cap is brown, stem that is olivaceous gray or yellowish, elongate spores and variable cheilocystidia; Smith recognized another species Mycena olivaceobrunnea, distinguished by its consistently smaller size and smaller spores 6.5-8 x 4-4.5 microns (8-10 x 4-5 microns in 2-spored variant); Maas Geesteranus remeasured spores to be 7.6-9.8 x 4.5-5.4 microns and does not recognize M. olivaceobrunnea, but Michael Beug (pers. comm.) reports M. olivaceobrunnea from the Pacific Northwest with spore size and color matching Smith's description (cap color of M. olivaceobrunnea given by Smith as "buffy brown" to "dark olive buff" [Ridgway(1) colors] with a pallid margin, fading to sordid yellowish gray); description here derived from Smith(1) for M. citrinomarginata except where noted; Mycena citrinomarginata found at least BC, WA, OR, also ON, MB, CA, MI, NY, sporadic
(0.5)1-3.5(4)cm across, conic, broadly convex, or conic - bell-shaped, with margin close to the stem and incurved when young, often flaring in maturity; hygrophanous, grayish yellow to brownish yellow or bright yellow or even white, fading to yellowish or olive gray (color may be lighter in shady areas and darker in exposed areas); surface pruinose becoming bald and polished, moist, translucent-striate, when old sulcate [grooved], (Smith), "pale yellowish, greyish yellow, pure yellow, sulphureous, greenish yellow, olivaceous yellow, yellowish with a brownish grey shade, greyish green, darker at the centre (ochraceous, orange-yellow, brownish yellow, grey-brown, pale date brown), paler toward margin, more rarely entirely white", (Maas Geesteranus), pale yellowish to olivaceous to date brown (Trudell)
thick on cap center of large caps but otherwise thin, fragile; grayish yellow to whitish
ascending adnate, distant to subdistant, (14-20 reaching stem), 2-3 tiers of subgills, gills narrow, +/- 0.2-0.3cm, interveined; marginate: whitish or ash-gray with edges yellow (when cap yellow) to sordid brown (when cap brown), (Smith), whitish to yellow-gray usually with a lemon yellow edge, (Trudell)
3-8cm x (0.05)0.1-0.25cm, equal, fragile, round in cross-section or compressed, hollow; olivaceous gray or yellowish, usually paler and brighter in upper part; "the apex pruinose at first, either smooth or somewhat striate", base somewhat mycelioid
not distinctive
not distinctive
Microscopic spores:
spores 8-14 x 4-6 microns: in 4-spored variety 8-11 x 4-5.5(6) microns, in 2-spored variant 12-14 x 5-6 microns, elliptic to subcylindric [nearly cylindric], amyloid, [presumably smooth]; basidia 2-spored, 3-spored, or 4-spored; pleurocystidia "absent or very rare to occasional", cheilocystidia abundant and variable, awl-shaped, fusoid-ventricose, or clavate, all of these types either smooth, variously branched, or with finger-like prolongations over the upper part, (Smith)
Spore deposit:
white (Phillips)

Habitat / Range

single, scattered, or gregarious on moss, leaves, needles, or humus in deciduous and coniferous woods, spring and fall, (Smith), "in a wide variety of habitats, including under trees in forests and parks, under fallen leaves and mosses, on rotting tree bark, and in city-dwellers' lawns", (Trudell), fall to winter (Buczacki), spring, fall, winter

Synonyms and Alternate Names

Mycena olivaceobrunnea A.H. Sm.

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links


unknown (Phillips)

Additional Photo Sources

Related Databases

Species References

Smith(1), Phillips(1)*, Schalkwijk-Barendsen(1)*, Maas Geesteranus(1), Trudell(4)*, Buczacki(1)*

References for the fungi

General References