Author: D. Arora & J.L. Frank
Citation: Mycologia 106(3): 466 (2014)
The red capped cryptic taxa are distinguished by:
Butyriboletus querciregius: Growth almost exclusively with true oak (poss. tanoak) , cap pink to rosy or with yellow areas, in fall along coast; spores up to 15 microns, Q value approximately 3.
Cap deep purplish pink or deep rose when young, growth with conifers or tanoak/madrone, spores up to 17 microns, Q value up to 3.5:
Butyriboletus autumniregius (fruiting in fall in mountains as well as low elevation)
Butyriboletus primiregius (fruiting in spring in mountains)
Butyriboletus abieticola grows with true fir at elevation (rare and local along north CA coast) and has the distinctive pale-patchy cap.
Boletes with “yellow tube layer that often bruises blue, yellow reticulate stipe, mild flavor and firm yellow-tinged flesh that may … turn blue when exposed.”1
Created: 2014-06-04 13:53:10 CDT (-0500) by Christian (Christian Schwarz)
Last modified: 2014-06-10 05:51:09 CDT (-0500) by Joseph D. Cohen (Joseph D. Cohen)
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