Page author: Julie Jones
Boletus rubripes
bitter bolete, red-stemmed bitter bolete
WTU specimens
Other herbaria

Distribution: Widespread but not particularly common in the PNW region.

Habitat: It was described from coastal conifer and mixed forests in California, but in the PNW, occurs in montane conifer forests.

Conservation Status: Not of concern

Description:
Common Names:

bitter bolete, red-stemmed bitter bolete

Identification Notes:

Boletus rubripes is medium-sized to larger, with a dry, matted tomentose to fibrillose, pale buff to olive brown or more brownish cap; the surface sometimes cracks in dry weather, but does not develop reddish colors like B. chrysenteron. B. rubripes has yellow tubes and pores that readily stain blue when bruised or cut, a feature it shares with a number of similar species including B. coniferarum and B. smithii. The name “rubripes” (red foot in Latin) refers to the lower portion of the stipe which is some shade of red. The stipe apex is yellow and it is not reticulate like that of B. coniferarum, although the lower portion may become ridged or striate. The base usually is covered by yellow mycelium. The flesh is bitter, cream to yellow or rarely pinkish in the cap, white to yellow in the upper stipe, and red to vinaceous in the base; when cut, it instantly changes to blue. It was described from coastal conifer and mixed forests in California, but in the PNW, occurs in montane conifer forests where one is likely to also encounter B. calopus. The latter is similar in coloration and bitterness, but has a reticulate stipe apex.

Accepted Name:
Boletus rubripes Thiers

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Boletus rubripes in the Consortium of Pacific Northwest Herbaria database.

CalPhotos: Boletus rubripes photos.

4 photographs:
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