Caloboletus marshii
{{Short description|Species of mushroom}}
{{Speciesbox
| image = 2014-09-10 Caloboletus marshii D. Arora, C.F. Schwarz & J.L. Frank 454553.jpg
| status = LC
| status_system = IUCN3.1
| genus = Caloboletus
| species = marshii
| authority = D. Arora, C.F. Schwarz, J.F. Frank
}}
{{Mycomorphbox
| name = {{PAGENAME}}
| hymeniumType = pores
| capShape = convex
| stipeCharacter = bare
| sporePrintColor = olive-brown
| ecologicalType = mycorrhizal
| howEdible = inedible
}}
Caloboletus marshii, commonly known as Ben's bitter bolete,{{Cite book |last=Arora |first=David |title=Mushrooms demystified: a comprehensive guide to the fleshy fungi |date=1986 |publisher=Ten Speed Press |isbn=978-0-89815-169-5 |edition=2nd |location=Berkeley}}{{Cite book |last=Schwarz |first=Christian |title=Mushrooms of the redwood coast: a comprehensive guide to the fungi of coastal northern California |last2=Siegel |first2=Noah |date=2016 |publisher=Ten Speed Press |isbn=978-1-60774-817-5 |location=Berkeley}} is a species of mushroom in the family Boletaceae. It is not poisonous, but it is too bitter to eat. It turns blue when cut or bruised, and it grows under live oak.
Taxonomy
Caloboletus marshii was first unofficially described by David Arora as Boletus "marshii" in his book Mushrooms Demystified, which was first published in 1979 and later revised in 1986.{{cite journal |author=Frank JL |title=Nomenclatural novelties |journal=Index Fungorum |date=24 October 2014 |url=http://www.indexfungorum.org/Publications/Index%20Fungorum%20no.194.pdf |page=1 |issn=2049-2375}} In 2014, Jonathan L. Frank formally described the species as Caloboletus marshii.
Description
= Similar species =
Caloboletus marshii can be confused with the brown butter bolete, Butryiboletus persolidus. It can also be confused with the white king bolete, Boletus barrowsii, which doesn't bruise blue as much as Caloboletus marshii.{{Cite web |title={{!}} The Santa Cruz Mycoflora Project |url=https://scmycoflora.org/genera/caloboletus/caloboletus-marshii.php |access-date=2024-07-14 |website=scmycoflora.org}}
Habitat and ecology
Caloboletus marshii is a mycorrhizal fungus that grows under live oaks in California, Oregon, and Washington. It fruits in late summer and fall, often before the rains come. It is rarely found fruiting in November.