Lactarius olympianus

Lactarius olympianus

A gorgeous western Lactarius recognized by a combination of features:

-a fairly large, bright orange cap with concentric zones of color;
-growth under mountain spruces;
-white milk that does not change color but stains the gills brownish to orangish brown;
-a stem that lacks potholes and discolors brownish when handled;
-acrid taste;
-a cap margin that is not hairy, even when young; and
-large, partially reticulate spores.
Lactarius olympianus  Geotagged,Lactarius olympianus,Summer,United States

Appearance

Cap: 2–10 cm; convex with an incurved margin when young, becoming flat, shallowly depressed, or shallowly vase-shaped; slimy to sticky when wet; fairly bald; the margin not hairy, even when young; bright orange with concentric zones of paler orange.

Gills: Attached to the stem or running down it; close or nearly distant; whitish at first, becoming yellowish or orangish; developing orangish brown to brown stains and discolorations.

Stem: 2–5 cm long; up to 2 cm thick; more or less equal, or with a tapered base; dry or moist; without potholes; smooth; white; discoloring brownish to dingy orangish or yellowish where handled.

Flesh: White; not changing when sliced, or developing rusty stains.

Milk: White; not changing when exposed to air; staining the gills brownish to orangish brown.

Distribution

ID, OR, WA, CO, WY

Habitat

montane conifer forests of the PNW;

References:

Some text fragments are auto parsed from Wikipedia.

http://www.mushroomexpert.com/lactarius_olympianus.html
Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassAgaricomycetes
OrderRussulales
FamilyRussulaceae
GenusLactarius
SpeciesLactarius olympianus