E-Flora BC: Electronic Atlas of the Flora of British Columbia

Boletus pulcherrimus Thiers and Halling
red-pored bolete
Boletaceae

Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.

Introduction to the Macrofungi

© Michael Beug  Email the photographer   (Photo ID #14874)

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Distribution of Boletus pulcherrimus
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Species Information

Summary:
Features include dark reddish brown, tomentose to fibrillose cap, dark red pores, yellow flesh and tubes that turn blue, and club-shaped to somewhat bulbous stem colored pale reddish brown with dark red reticulations. Thiers and Halling in 1976 examined the type of Boletus eastwoodiae (Murrill) Saccardo & Trotter and found it to be Boletus satanas (treated here as Boletus eastwoodiae): what had passed in California under the name Boletus eastwoodiae was renamed Boletus pulcherrimus, (Thiers(9)). Boletus pulcherrimus is found in WA, OR, and CA, (Thiers), and BC and NM, (Bessette).
Cap:
8-20cm, convex, expanding, sometimes to flat or irregular in outline; reddish brown when young, usually with reddish tones particularly near margin, unchanging when old or darkening somewhat, moist to dry, bald to subtomentose to sometimes slightly velvety when young, unchanging or becoming obscurely appressed-fibrillose when old, often when very old somewhat areolate [cracked like dried mud] and obscurely fibrillose scaly, the scales often developing grayish tips, (Thiers), "reddish brown at first, becoming olive-brown to grayish on the fibrils over a pinkish red to dull red ground color, distinctly pinkish red to dull red along the margin"; margin incurved at first, usually with a narrow band of sterile tissue, (Bessette)
Flesh:
2-4cm thick, bright yellow, changing to blue when first exposed then often fading to pale bluish yellow, (Thiers)
Pores:
up to 1 mm, angular; dark red when young, changing to reddish brown when old, often yellow near margin, turning blue when bruised; tube layer 0.5-1.5cm thick, adnate to adnexed when young, usually depressed when old, yellow, turning blue immediately on exposure, (Thiers), 2-3 per mm, angular to irregular, dark red at first, becoming orange-red, then brownish red, instantly turning blue when bruised, (Bessette)
Stem:
7-16cm x 2-5cm, widening to 10cm thick at base, club-shaped to bulbous but not abruptly bulbous, sometimes equal especially when young, solid; pale reddish brown, base often staining brown, turning blue elsewhere when bruised; dry, dark red reticulation at least over upper 2/3, (Thiers), partial veil and annulus absent (Bessette)
Odor:
mild (Thiers)
Taste:
mild (Thiers)
Microscopic:
spores 13-16 x 5.5-6.5 microns, subelliptic to subfusoid, smooth, not dextrinoid, ochraceous in KOH, moderately thick-walled; basidia 1-4-spored, 35-40 x 9-12 microns; hymenial cystidia scattered, 33-60 x 8-12 microns, fusoid-ventricose to subclavate to basidioid, colorless to ochraceous in KOH; cap cuticle a trichodermium of tangled hyphae with noticeably roughened walls; clamp connections absent, (Thiers)
Spore Deposit:
brown (Thiers), olive-brown (Arora)

Habitat / Range

single to gregarious in humus in mixed woods, (Thiers), single or scattered on ground in conifer or mixed woods, August to January, (Bessette), summer, fall, winter

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links

Edibility

poisonous, causing severe gastrointestinal distress, at least one fatality, (Bessette)

Additional Photo Sources

Related Databases

Species References

Thiers(9), Bessette(3)*, Castellano(1)*, Arora(1), Schalkwijk-Barendsen(1)*, Ammirati(1)*, AroraPocket*

References for the fungi

General References