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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. The illustrated and described collections are from Illinois and Québec.
Cap: 3.5–8 cm across; convex, becoming broadly convex or nearly flat; bald; dry or moist, with a greasy feel; dull yellowish, with scattered watery spots—fading to yellowish buff; the margin not lined.
Gills: Narrowly attached to the stem; close; short-gills frequent; pale yellow.
Stem: 5–8 cm long and 0.5–1 cm thick; more or less equal; bald; pale yellow; basal mycelium white and copious.
Flesh: Whitish in cap; yellowish in stem; unchanging when sliced.
Odor and Taste: Odor slightly fragrant; taste slightly bitter, or not distinctive.
Chemical Reactions: KOH on cap surface negative.
Spore Print: Yellowish.
Microscopic Features: Spores 5–6 x 3.5–5 µm; subglobose to broadly ellipsoid; apiculus prominent; smooth; hyaline in KOH; at least a few dextrinoid. Pleurocystidia not found. Cheilocystidia scattered and inconspicuous; subclavate to subcylindric; often lobed or with projections; up to 50 µm long. Pileipellis a cutis of cylindric elements 4–8 µm wide. Clamp connections present.
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Cite this page as:
Kuo, M. (2018, March). Rhodocollybia maculata var. scorzonerea. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/rhodocollybia_maculata_scorzonerea.html