Aureoboletus russellii

Short description: Species of fungus

Aureoboletus russellii

Scientific classification
Kingdom:  | Fungi
Division:  | Basidiomycota
Class:  | Agaricomycetes
Order:  | Boletales
Family:  | Boletaceae
Genus:  | Aureoboletus
Species:  |

A. russellii

Binomial name
Aureoboletus russellii

(Frost) G. Wu & Zhu L. Yang (2016)

Synonyms[1]

Boletus russellii Frost (1878)
Ceriomyces russellii (Frost) Murrill (1909)
Boletellus russellii (Frost) E.J. Gilbert (1931)
Frostiella russellii (Frost) Murrill (1942)

Aureoboletus russellii

float Mycological characteristics
| pores on hymenium
| cap is convex
| hymenium is adnate
| stipe is bare

| spore print is olive
| ecology is mycorrhizal
| edibility: edible

Aureoboletus russellii, commonly known as the jagged-stemmed bolete[2] or Russell's bolete, is a species of bolete fungus in the family Boletaceae. The fruit bodies are characterized by their coarsely shaggy stem. The yellow-brown to reddish-brown caps are initially velvety, but become cracked into patches with age.

An edible species, it is found in Asia and eastern North America, where it grows in a mycorrhizal association with oak, hemlock, and pine trees.

## Contents

* 1 Taxonomy
* 2 Description
* 2.1 Similar species
* 3 Habitat and distribution
* 4 Uses
* 5 See also
* 6 References

## Taxonomy

Originally named Boletus russellii by Charles Christopher Frost in 1878 from collections made in New England,[3] the species was transferred to Boletellus by Edouard-Jean Gilbert in 1931.[4] It was then transferred to Aureoboletus by Gang Wu and Zhu L. Yang in 2016.[5] The specific epithet russellii honors American botanist and Unitarian minister John Lewis Russell, the first collector of the species.[6] Common names given to the mushroom include shagnet,[7] jagged-stem bolete,[8] and Russell's bolete.[9]

## Description

The cap is hemispheric to convex or broadly convex, reaching a diameter of 3–13 cm (1 1⁄4–5 in).[2] The cap surface is initially velvety, with a margin rolled inward, but after maturing the cap becomes cracked and forms scale-like patches.[2] The color is yellow-brown to reddish-brown to olive-gray, while the flesh is pale yellow to yellow.[2] The pore surface is yellow to greenish yellow;[2] when the pore surface is rubbed or injured it will turn a brighter yellow color. The pores are angular, and about 1 mm wide, while the tubes that comprise the pores are up to 2 cm (3⁄4 in) deep.

The stem is up to 20 cm (8 in) long and 1–2 cm (3⁄8–3⁄4 in) thick, and either roughly equal in width throughout, or slightly thicker at the base.[2] Reddish brown to pinkish tan in color, the stem is solid (i.e. not hollow or stuffed with a pith), sometimes curved and viscid at the base. The surface texture is characterized by deep grooves and ridges, with the ridges torn and branched so as to appear shaggy.[2] No partial veil or ring are present.[2]

The spore print is olive brown.[2] The spores are ellipsoid, measuring 15–20 by 7–11 μm.[9] Similar to the reticulation of the stem,[8] the spore surfaces have deep longitudinal grooves and furrows, sometimes with a cleft in the wall at the top of the spore.[9]

### Similar species

Aureoboletus betula is somewhat similar in stature and also has a deeply reticulate stem, but can be distinguished by its smooth, shinier cap and spores with pits.[9] Boletellus ananas is somewhat similar.[2]

## Habitat and distribution

Aureoboletus russellii is known from eastern North America,[10] where it grows singly or scattered on the ground in association with oak, hemlock, and pine trees. The geographic range extends from eastern Canada south to Central America,[8] and west to Michigan and southern Arizona. It is also found in Asia, including Korea[11] and Taiwan.[12]

## Uses

The fruit bodies are edible,[9] but of low culinary interest due to being soft and little flavour.[2][8]

## See also

* List of North American boletes

## References

1. ↑ "Boletellus russellii (Frost) E.-J. Gilbert 1931". MycoBank. International Mycological Association. http://www.mycobank.org/MycoTaxo.aspx?Link=T&Rec=254517. Retrieved 2012-08-31.
2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 Arora, David (1986). Mushrooms Demystified: A Comprehensive Guide to the Fleshy Fungi (2nd ed.). Berkeley, CA: Ten Speed Press. pp. 508-509. ISBN 978-0-89815-170-1. https://archive.org/details/arora-david-mushrooms-demystified-a-comprehensive-guide-to-the-fleshy-fungi-ten-speed-press-1986/page/508/mode/2up.
3. ↑ Peck CH. (1878). "Report of the Botanist (1875)". Annual Report on the New York State Museum of Natural History 29: 29–83.
4. ↑ Gilbert E-J. (in French). Les Livres du Mycologue Tome I-IV, Tom. III: Les Bolets. pp. 1–254 (see pg. 107).
5. ↑ Wu, Gang; Li, Yan-Chun; Zhu, Xue-Tai; Zhao, Kuan; Han, Li-Hong; Cui, Yang-Yang; Li, Fang; Xu, Jian-Ping et al. (2016). "One hundred noteworthy boletes from China". Fungal Diversity 81: 25–188 [59]. doi:10.1007/s13225-016-0375-8. https://link.springer.com/article/10.1007/s13225-016-0375-8.
6. ↑ The Mushroom Hunter's Field Guide. Ann Arbor, Michigan: University of Michigan Press. 1980. p. 112. ISBN 0-472-85610-3. https://books.google.com/books?id=TYI4f6fqrfkC&pg=PA112.
7. ↑ A Field Guide to Mushrooms: North America. Peterson Field Guides. Boston, Massachusetts: Houghton Mifflin. 1987. p. 101. ISBN 0-395-91090-0. https://books.google.com/books?id=kSdA3V7Z9WcC&pg=PA101.
8. ↑ 8.0 8.1 8.2 8.3 The Book of Fungi. Chicago, Illinois: University of Chicago Press. 2011. p. 327. ISBN 978-0226721170.
9. ↑ 9.0 9.1 9.2 9.3 9.4 North American Boletes. Syracuse, New York: Syracuse University Press. 2000. pp. 86–7. ISBN 9780815605881.
10. ↑ Kuo M. (November 2006). "Boletellus russellii". MushroomExpert.com. http://www.mushroomexpert.com/boletellus_russellii.html. Retrieved 2012-08-31.
11. ↑ An Y-H. (1998). "Notes on Korean Strobilomycetaceae (II) – on Boletellus" (in Korean). Korean Journal of Mycology 26 (2): 211–29. ISSN 0253-651X.
12. ↑ "The boletes of Taiwan (X)". Taiwania 43 (2): 140–9. 1998. ISSN 0372-333X.

Wikidata ☰ Q107506448 entry

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