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Name: Boletus edulis Bull.

Rank: Species
Status: Accepted
Name: Boletus edulis
Author: Bull.
Citation:
Version: 8
Previous Version: 7
Genus: Boletus L.

Drafts are new versions of the description fields for a name being worked on within a project. Only members of the project can view drafts. Only the owner of a draft can edit them. You can create a new draft version of the description fields for this name for any project you are a member of.
Existing Drafts
  2008/2009 EOL University Species Pages Initiative (Lauren Z (Renhj19))


Description status: Approved
  (Latest review: 2009-09-22 by nathan)

General Description:

Boletus edulis (28)
Macroscopic characteristics Pileus can be nearly any shade of brown, starts convex and becomes nearly flat with maturity, and has a tackiness when it becomes wet. The cap can be between 8-30 cm. The pore surface is white when young and becomes olive-yellow with age. It does not bruise except in maturity when it may bruise olive. The pores are small and circular (2-3 per mm.) The stem is thick, usually club-shaped and can be bulbous but rarely equal. It can be 5-26 cm long, 2-8 cm thick with fine reticulations on the upper portion. The reticulations are white with pale brown. Annulus and partial veil are not present. The flesh is white and does not blue when bruised unlike some other boletes. KOH produces an orange or red reaction on the cap but has no reaction on the flesh. The spore print is olive brown.

Microscopic characteristics The spores are 13-19 × 4-7 µm, smooth elleptic and a pale yellow brown color.

The fruiting bodies can be solitary, scattered or in groups on the ground around conifers. They are found between June and October. This is an edible mushroom if keyed out correctly.

Some common names are porcini, cep, and King Bolete.


Diagnostic Description:

Boletus chippewaensis looks similar to B. edulis but has a pale lemon yellow cap with bright red sometimes. The pore surface is a creamy lemon yellow. Boletus nobilissimus has reticulation down the whole length of the stem.

Boletus edulis is clearly a complex of species. More work needs to be done to distinguish the species. The name Boletus edulis gets applied very generally to the choice edible species of Boletus that do not stain, have white-yellow pores, and have a reticulum on the upper part of the stipe. The actual type for B. edulis comes from Europe and is assoicated with hardwoods.


Distribution:

It is found throughout North America. B. edulis was origianlly classified from Europe but that particular mushroom can be distinguished from the American variety by key macroscopic characteristics.


Habitat:

B. edulis is mycorrhizal with conifers. The originally classified B. edulis characterized from Europe is mycorrhizal with hardwoods.


Look Alikes:

B. chippewaensis and Tylopilus felleus look similar to B. edulis.

See also Tom Volk’s page on Boletus barrowsii, Chuck Barrows’ bolete

In the western US the name B. edulis has been applied to the separate species Boletus rex-veris which fruits in the spring in the Sierra Nevada and the coastal fall variety Boletus edulis var. grandedulis.


Uses:

It is edible and particularly chosen for its delicious qualities.


References:

Description authors: Tom Volk, Lauren Z
Request Authorship Credit 
Description editors: Nathan Wilson, Johannes Harnisch


Varieties:

Boletus edulis var. clavipes (Peck) Pilat & Dermek
Boletus edulis var. grandedulis Arora & Simonini



Observations:

64003
Boletus edulis Bull. (27946)
Stadtroda, Thueringen, Germany: Andreas Gminder (mollisia)
Observation made: 2009-09-26
Community confidence: 95%
35098
Boletus edulis Bull. (17394)
Puy-de-Dôme, Clermont-Ferrand, France: Michael Wood (mykoweb)
Observation made: 2001-10-15
Community confidence: 94%
50397
Boletus edulis Bull. (23226)
Forest near Elgin Street, Pembroke, Ontario, Canada: Paul Derbyshire (Twizzler)
Observation made: 2009-07-15
Community confidence: 91%
59471
Boletus edulis Bull. (26276)
Washington Crossing State Park, Mercer Co., New Jersey, USA: I. G. Safonov (IGSafonov)
Observation made: 2009-10-05
Community confidence: 91%
61676
Boletus edulis Bull. (27067)
World Forestry Center, Portland, Multnomah Co., Oregon, USA: Daniel B. Wheeler (Tuberale)
Observation made: 2009-10-18
Community confidence: 91%
38044
Boletus edulis Bull. (19048)
Huber Alm, Dorfgastein, Bezirk Sankt Johann im Pongau, Salzburg, Austria: Gerhard Koller (Gerhard)
Observation made: 2008-07-22
Community confidence: 91%
38025
Boletus edulis Bull. (19045)
Huber Alm, Dorfgastein, Bezirk Sankt Johann im Pongau, Salzburg, Austria: Gerhard Koller (Gerhard)
Observation made: 2008-07-21
Community confidence: 91%
27977
Boletus edulis Bull. (13734)
Lapland, Sweden: Irene Andersson (irenea)
Observation made: 2007-08-20
Community confidence: 90%
62504
Boletus edulis Bull. (27453)
Aptos, Santa Cruz Co., California, USA: Shane (Mushane)
Observation made: 2009-10-27
Community confidence: 84%
18008
Boletus edulis Bull. (9719)
Camp Magruder, Tillamook Co., Oregon, USA: Daniel B. Wheeler (Tuberale)
Observation made: 2003-11-02
Community confidence: 84%
17613
Boletus edulis Bull. (9469)
Portland, Multnomah Co., Oregon, USA: Daniel B. Wheeler (Tuberale)
Observation made: 2003-10-19
Community confidence: 83%
17497
Boletus edulis Bull. (9407)
Portland, Multnomah Co., Oregon, USA: Daniel B. Wheeler (Tuberale)
Observation made: 2001-10-20
Community confidence: 83%


Similar Observations:
(Someone proposed Boletus edulis Bull. for these observations, but consensus hasn’t accepted it. Confidence value is for this name, not the consensus name.)

16792
Boletus edulis var. grandedulis Arora & Simonini (8882)
Point Reyes National Seashore, Marin Co., California, USA: Darvin DeShazer (darv)
Observation made: 2008-08-10
Community confidence: 73%
16790
Boletus edulis var. grandedulis Arora & Simonini (8880)
Point Reyes National Seashore, Marin Co., California, USA: Darvin DeShazer (darv)
Observation made: 2008-08-10
Community confidence: 64%
16788
Boletus edulis var. grandedulis Arora & Simonini (8878)
Point Reyes National Seashore, Marin Co., California, USA: Darvin DeShazer (darv)
Observation made: 2008-08-10
Community confidence: 64%
35775
Boletus sp. L. (18122)
Mamouth Pennsylvania: John (John Plischke)
Observation made: 2008-07-17
Community confidence: 59%
78409
Boletus edulis var. grandedulis Arora & Simonini (33719)
Grays Harbor Co., WA, USA: Dan K. (Dan K.)
Observation made: 2009-09-21
Community confidence: 55%
55735
Boletus sp. L. (24966)
Forest near Elgin Street, Pembroke, Ontario, Canada: Paul Derbyshire (Twizzler)
Observation made: 2009-09-04
Community confidence: 46%
28626
Boletus edulis var. grandedulis Arora & Simonini (14001)
Coastal Sonoma County: pennybun (pennybun)
Observation made: 2008-10-29
Community confidence: 37%
63185
Boletus edulis var. grandedulis Arora & Simonini (27678)
Soquel, Santa Cruz Co., California, USA: Shane (Mushane)
Observation made: 2009-11-02
Community confidence: 30%
28670
Boletus edulis var. grandedulis Arora & Simonini (14009)
San Francisco, California, USA: (CureCat)
Observation made: 2008-11-01
Community confidence: 29%
34597
Boletus edulis var. grandedulis Arora & Simonini (16318)
Albion, Mendocino Co., California, USA: Douglas Smith (douglas)
Observation made: 2008-12-06
Community confidence: 28%
64722
Boletus edulis var. grandedulis Arora & Simonini (28230)
Soquel, california: (crbbndt)
Observation made: 2009-11-14
Community confidence: 27%
27911
Boletus edulis var. grandedulis Arora & Simonini (13541)
Mendocino, Mendocino Co., California, USA: Ryane Snow (snowman)
Observation made: 2008-11-04
Community confidence: 25%

Name Created: Tue Jan 09 21:03:57 -0500 2007
Last Modified: Tue Sep 22 21:40:03 -0400 2009 by Nathan Wilson (nathan)
Viewed: 2296 times, last viewed: Thu Mar 11 17:27:05 -0500 2010
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