Butyriboletus primiregius D. Arora & J.L. Frank
Mycologia 106(3): 474, 2014.

Common Name: none

Misapplied name: Butyriboletus regius

• Description

  For descriptions see Arora & Frank and Siegel & Schwarz.

• Habitat

  Solitary to gregarious in soil, associated with conifers, primarily firs (Abies spp.); spring and early summer; Cascade and Sierra Nevada ranges.

• Edibility

  Edible and excellent.

• Comments

  Butyriboletus primiregius can be distinguished by its spring fruiting, vinaceous to dark red cap, yellow pores, and yellow reticulated stipe.

• References

  Arora, D. & Frank, J.L. (2014). Clarifying the butter Boletes: a new genus, Butyriboletus, is established to accommodate Boletus sect. Appendiculati, and six new species are described. Mycologia 106(3): 464-480. (Protologue)
  Siegel, N. & Schwarz, C. (2024). Mushrooms of Cascadia: A Comprehensive Guide to the Fungi of the Pacific Northwest. Backcountry Press: Keeland, CA. 576 p.
  Wang Y et al. (2024). Polyphasic taxonomy clarifies the relationships between Butyriboletus and Exsudoporus, and new taxa and reports of Boletaceae from ChinaMycosphere 15(1), 881–953.

• Other Descriptions and Photos
  Main Photo
  • Damon Tighe: Butyriboletus primiregius (CP)
  • Damon Tighe: Butyriboletus primiregius (CP)
  • Warren Cardimona: Butyriboletus primiregius (CP)
  • Alan Rockefeller: Butyriboletus primiregius (CP)
  • Mushroom Observer: Butyriboletus primiregius (CP)
  • iNaturalist: Butyriboletus primiregius (CP)
  • Trudell & Ammirati: p. (D & CP)
  
  

  (D=Description; I=Illustration; P=Photo; CP=Color Photo)