| Major Groups > Gilled Mushrooms > Pale-Spored > Lactarius > Lactarius chrysorrheus |
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Lactarius chrysorrheus [ Basidiomycetes > Russulales > Russulaceae > Lactarius . . . ] by Michael Kuo Lactarius chrysorrheus (sometimes spelled with one r as Lactarius chrysorheus) is mycorrhizal with oaks and other hardwoods; it features a pale pinkish cap, gills that do not develop reddish spots and discolorations, and white milk that turns yellow when exposed to air. Its stem is not slimy, and its surface does not feature potholes. The smooth stem is the best way to separate Lactarius chrysorrheus from Lactarius maculatipes, which shares the hardwood habitat and yellowing milk but features yellowish potholes and (usually) a nearly white cap. The similar Lactarius vinaceorufescens is mycorrhizal with conifers, usually has a redder cap, and has gills that develop reddish spots by maturity. If you are on the West Coast, see Lactarius xanthogalactus. None of the milky caps with yellowing milk should be considered for the table. Description: Ecology: Mycorrhizal with oaks and possibly other hardwoods; summer and fall; to be expected throughout the oak forests of eastern North America. Cap: 3-10 cm; broadly convex with an inrolled margin when young; becoming shallowly depressed or vase-shaped with an uplifted margin; moist or dry; smooth or finely roughened; pale pinkish to pale cinnamon; often with vague concentric zones of color, at least when young. Gills: Attached to the stem or beginning to run down it; close; whitish to pale yellowish; not bruising or discoloring, not developing reddish spots with maturity. Stem: 3-8 cm long; 1-2 cm thick; more or less equal; dry; without potholes; whitish. Flesh: White; firm; yellow when sliced. Milk: Copious; white, becoming quickly yellow on exposure to air. Odor and Taste: Odor not distinctive; taste acrid. Spore Print: Yellowish. Chemical Reactions: KOH on cap surface yellowish to pale olive. Microscopic Features: Spores 6-9 x 5.5-6.5 µ; broadly elliptical; ornamentation with prominences up to 1 µ high; connecting lines forming a broken reticulum. REFERENCES: Fries, 1838. (Saccardo, 1887; Coker, 1918; Kauffman, 1918; Hesler & Smith, 1979; Smith, Smith & Weber, 1979; Weber & Smith, 1985; Phillips, 1991/2005; Heilmann-Clausen et al., 1998; Metzler & Metzler, 1992; Barron, 1999; McNeil, 2006; Miller & Miller, 2006.) Herb. Kuo 10010408. Further Online Information: Lactarius chrysorheus in Hesler & Smith (1979) |
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Cite this page as: Kuo, M. (2007, September). Lactarius chrysorrheus. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/lactarius_chrysorrheus.html |