Aureoboletus betula
Scientific classification
Kingdom:
Fungi
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Boletales
Family:
Boletaceae
Genus:
Aureoboletus
Species:
A. betula
Binomial name
Aureoboletus betula
(Schwein.) M. Kuo & B. Ortiz (2020)
Synonyms

Boletus betula Schwein. (1822)
Ceriomyces betula Murrill (1909)
Boletellus betula E.-J.Gilbert (1931)
Frostiella betula Murrill (1942)
Austroboletus betula E. Horak (1980)
Heimiella betula Watling (1990)
Heimioporus betula E. Horak (2004)

Aureoboletus betula
View the Mycomorphbox template that generates the following list
Pores on hymenium
Cap is convex
Hymenium is adnate
Stipe is bare
Spore print is olive
Ecology is mycorrhizal
Edibility is unknown

Aureoboletus betula is a species of mushroom producing fungus in the family Boletaceae.[1] It is commonly known as the Shaggy Stalked Bolete.[2]

Taxonomy

It was first described in 1822 by the German-American mycologist Lewis David de Schweinitz and classified as Boletus betula.[3] It has been reclassified many times over the years and is still sometimes referred to by the 2004 classification Heimioporus betula as given to it by the Austrian mycologist Egon Horak.[4][5]

In 2020 it was reclassified as Aureoboletus betula by the mycologists Michael Kuo and Beatriz Ortiz-Santana.[6]

Description

Aureoboletus betula features finely pitted spores. It is found under oaks, or in mixed woods of pine and oak, primarily in the southern Appalachians.

This bolete has a stem that is deeply, coarsely reticulate and, when the mushroom is in the "button" stage, often as wide as, or even wider than, the cap. With development the stem stretches out dramatically, becoming notably long. The sticky cap is reddish to yellow or orange, and the non-bruising pore surface is yellow, becoming slightly greenish with age. Under the microscope, Aureoboletus betula features finely pitted spores.

Cap: 2–5 cm. Convex and broadening with age. Starts golden yellow discolouring to brownish yellow or reddish orange. Texture is sticky and flesh is yellow. Pores: 1-2 pores every millimeter with tubes that are 1.5 cm deep. Bright yellow turning greenish yellow with age. Stem: 10–15 cm tall with a thickness of 1–2 cm. Distinctly textured with deep ridges with a slightly swollen and rooting base. Stem flesh is white with pink staining when exposed to air. Spore print: Olive. Spores: Ellipsoid. 16-24 x 7-12 µm. Taste: Indistinct. Smell: Indistinct.[7]

Edibility

This species is edible.[8]

Etymology

The specific epithet 'betula', meaning birch is not in reference to any specific habitat characteristics like growing under birch trees but rather a reference to the shaggy bark of birch trees which the stipe of this species is reminiscent of.[9]

References

  1. ↑ "Species Fungorum - Aureoboletus betula (Schwein.) M. Kuo & B. Ortiz, Mycologia 112(1): 205 (2020)". www.speciesfungorum.org. Retrieved 2022-07-15.
  2. ↑ "Boletellus betula ("Shaggy Stalked Bolete")". The Bolete Filter. 2015-07-23. Retrieved 2022-07-16.
  3. ↑ "Species Fungorum - Boletus betula Schwein., Schr. naturf. Ges. Leipzig 1: 94 [68 of repr.] (1822)". www.speciesfungorum.org. Retrieved 2022-07-16.
  4. ↑ Horak, E. (1999). "New Genera of Agaricales (Basidiomycota). 1. Rapacea gen. nov". Kew Bulletin. 54 (3): 789–794. doi:10.2307/4110877. ISSN 0075-5974. JSTOR 4110877.
  5. ↑ "Heimioporus E. Horak gen. nov. - replacing HeimiellaBoedijn (1951, syn. post., Boletales, Basidiomycota)" (PDF).
  6. ↑ Kuo, Michael; Ortiz-Santana, Beatriz (2020-01-02). "Revision of leccinoid fungi, with emphasis on North American taxa, based on molecular and morphological data". Mycologia. 112 (1): 197–211. doi:10.1080/00275514.2019.1685351. ISSN 0027-5514. PMID 31900053. S2CID 209751453.
  7. ↑ "Kuo, M. (2020, March). Aureoboletus betula. Retrieved from the MushroomExpert.Com Web". www.mushroomexpert.com. Retrieved 2022-07-16.
  8. ↑ Miller Jr., Orson K.; Miller, Hope H. (2006). North American Mushrooms: A Field Guide to Edible and Inedible Fungi. Guilford, CN: FalconGuides. p. 390. ISBN 978-0-7627-3109-1.
  9. ↑ "Alabama Mushroom Society - Aureoboletus". alabamamushroomsociety.org. Retrieved 2022-07-16.


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