Major Groups > Gilled Mushrooms > Pale-Spored > Collybioid > Rhodocollybia maculata var. scorzonerea

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Rhodocollybia maculata var. scorzonerea

[ Basidiomycetes > Agaricales > Marasmiaceae > Rhodocollybia . . . ]

by Michael Kuo

This variety of Rhodocollybia maculata differs from the typical variety in having yellow colors and closely spaced (rather than crowded) gills. I suspect it may constitute a separate species--or even a group of species--distinct from Rhodocollybia maculata, but this is only a hunch. Many, many varieties of Rhodocollybia maculata have been described (see Lennox, 1979 and Smith & Hesler, 1943), and this taxonomic area would make a great project for some enterprising young graduate student in DNA-based mycology somewhere.

Description:

Ecology: Saprobic; decomposing the deadwood or litter of conifers; summer and fall; distribution uncertain, but possibly widely distributed in North America.

Cap: 3.5-15 cm across; convex, becoming broadly convex or nearly flat; bald; dry or slightly moist; dull yellowish, with scattered watery spots--fading to yellowish buff, with pinkish discolorations; the margin not lined.

Gills: Narrowly attached to the stem; close; yellow; often developing rusty spots with age.

Stem: 5-12 cm long and 0.5-1.5 cm thick; more or less equal; bald; yellowish; developing cinnamon to rusty spots with age; basal mycelium whitish and copious.

Flesh: Whitish in cap; yellowish in stem; unchanging.

Odor and Taste: Odor slightly fragrant; taste slightly bitter, or not distinctive.

Spore Print: Pale pinkish to yellowish.

Chemical Reactions: KOH on cap surface negative.

Microscopic Features: Spores 5.5-8 x 4-5 µ; subglobose to ellipsoid or lacrymoid; smooth; at least a few (often many) dextrinoid. Pleurocystidia absent. Cheilocystidia scattered and inconspicuous; subclavate to subcylindric; often lobed or with projections; up to 60 long. Pileipellis at maturity a densely interwoven cutis of cylindric elements 3-8 wide, not diverticulate, lacking branchlets.

REFERENCES: (Batsch, 1786) Lennox, 1979. (Fries, 1838; Saccardo, 1887; Smith & Hesler, 1943; Phillips, 1981/2005; McNeil, 2006.) Herb. Kuo 11020906.

Further Online Information:

Collybia maculata at Roger's Mushrooms (see second illustration)

 

Rhodocollybia maculata var scorzonerea

Rhodocollybia maculata var scorzonerea

Rhodocollybia maculata va.r scorzonerea

Rhodocollybia maculata var scorzonerea
Spores

Rhodocollybia maculata var scorzonerea
Cheilocystidium



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Kuo, M. (2013, February). Rhodocollybia maculata var. scorzonerea. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/rhodocollybia_maculata_scorzonerea.html