|Major Groups > Gilled Mushrooms > Pale-Spored > Amanita > Amanita sinicoflava|
by Michael Kuo
This subtly beautiful Amanita is a member of the Amanita vaginata group; like the other species in the group it lacks a ring and features a strongly lined cap margin, as well as a sacklike volva. Amanita sinicoflava can be separated from the others without a microscope on the basis of its olive tan to olive yellow cap and its volva, which usually stains gray to black by maturity. It is fairly widely distributed east of the Great Plains, and appears under hardwoods or conifers.
Ecology: Mycorrhizal with various conifers and hardwoods; growing alone or gregariously; summer and fall; fairly widely distributed east of the Great Plains.
Cap: 2.5-7 cm; bell-shaped, expanding to broadly bell-shaped, convex, or nearly flat; sticky or dry; sometimes with a few whitish or grayish patches that are easily lost; olive tan to olive yellow, sometimes darker over the center; the margin prominently lined.
Gills: Free from the stem or nearly so; close or nearly crowded; whitish, developing grayish tones with age.
Stem: 6-14 cm long; up to just over 1 cm thick; tapering slightly to the apex; without a basal bulb; white; discoloring a little brownish on handling; base encased in a loose but fairly persistent sacklike volva that is initially white but discolors grayish to blackish with maturity, beginning with the upper edge.
Flesh: Whitish; unchanging.
Odor: Not distinctive.
Spore Print: White.
Chemical Reactions: KOH on cap surface negative.
Microscopic Features: Spores 8-15 µ; globose or subglobose; smooth; inamyloid. Basidia primarily 4-spored; without basal clamps. Pileipellis a cutis or ixocutis of filamentous hyphae. Lamellar trama bilateral; subhymenium ramose to cellular.
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Cite this page as:
Kuo, M. (2013, May). Amanita sinicoflava. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/amanita_sinicoflava.html