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Rhodocollybia maculata var. scorzonerea
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.
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 µ long. Pileipellis at maturity a densely interwoven cutis of cylindric elements 3-8 µ wide, not diverticulate, lacking branchlets.
Further Online Information:
Collybia maculata at Roger's Mushrooms (see second illustration)
Cite this page as:
Kuo, M. (2013, February). Rhodocollybia maculata var. scorzonerea. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/rhodocollybia_maculata_scorzonerea.html