Name in North American Boletes: Leccinum oxydabile, AND roseofractum, AND rotundifoliae, AND scabrum
- Species 2: oxydabile
- Species 3: roseofractum
- Species 4: rotundifoliae
Common Name: “Birch Bolete”
- Common Name 2: “Birch Scaber Stalk”
- Common Name 3: “Common Scaber-Stalk”
- Common Name 4: “Brown Birch Bolete”
Tells: Classic salt & pepper stem. Whitish pores age to gray-brown & may slowly bruise to yellow- or olive-brown. Favors birch but also found with oak and other hardwoods.
Other Information: CAP: Varies annoyingly from concave in youth to broadly convex in age, & any color from white or buff-pink through yellow-brown to brown-black. PORES: Can be quite deep. STEM: Scabers often start pale & darken w/age & toward base. Stem may also have distinct blue-green stains by base or yellowish tones higher up. FLESH: White cap flesh often DNS; may stain pink, brown, burgundy- or purplish-gray; and if it stains, may or may not resolve to violet-gray or black. Grrr. Oh yes: the stem flesh has been known to stain blue by the base. Double grrr. ENVIRONMENT: Likes birch, but not exclusively. OTHER: There are many lookalikes and the whole Leccinum genus is sort of up-in-the-air until DNA testing identifies some more useful patterns. If you’re in California, L. montanum is a particularly common lookalike that grows under aspen.
Science Notes: DNA tests have merged no less than three (3!) species into scabrum. You can find the departed names in North American Boletes at L. oxydabile, L. roseofractum, and L. rotundifoliae.
- NH4OH (Ammonia): No reaction.
- KOH: Cap skin and flesh both turn reddish brown.
- FeSO4 (Iron Salts): Cap skin and flesh both turn slate gray, usually w/bluish or greenish tints.