Name: Suillus tomentosus (Kauffman) Singer
Most Confident Observations:
Copyright © 2009 Johannes Harnisch
Copyright © 2017 walt sturgeon (Mycowalt)
Copyright © 2013 walt sturgeon (Mycowalt)
Copyright © 2009 Nathan Wilson (nathan)
Version: 6
Previous Version 

First person to use this name on MO: Nathan Wilson
Editors: Alan Rockefeller, Erlon Bailey, Johannes Harnisch, Joseph D. Cohen


Rank: Species

Status: Accepted

Name: Suillus tomentosus

ICN Identifier: missing

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Author: (Kauffman) Singer

Citation: Mycologia 51(4): 570 (1960) [1959]

Misspellings: Sulillus tomentosus


Domain: Eukarya

Kingdom: Fungi

Phylum: Basidiomycota

Class: Agaricomycetes

Order: Boletales

Family: Suillaceae

Genus: Suillus

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Notes on Taxonomy: [Edit]

Type: Colorado

Brief Description: [See More | Edit]

Cap: 5-15 cm; convex becoming broadly convex; sticky or fairly dry; at first covered with a fine, grayish, felty covering, but often becoming smoother with age; yellow to orangish yellow; sometimes developing reddish spots and stains; the margin at first inrolled.

Pore Surface: Brownish to cinnamon when young, becoming brownish yellow to olive yellow; bruising blue; 1-2 angular pores per mm; tubes to 2 cm deep.

Stem: 4-12 cm long; 1-3 cm thick; equal or somewhat club-shaped; yellowish orange; covered with brownish glandular dots; staining brownish on handling; without a ring.

Flesh: Whitish to yellowish in the cap; yellow in the stem; bluing on exposure.

Odor and Taste: Not distinctive.

Chemical Reactions: Ammonia reddish to grayish or negative on the cap surface; brownish on flesh. KOH pinkish, then purple on cap surface; dark brown on flesh. Iron salts greenish to grayish on cap surface; gray to brown on flesh.

Spore Print: Olive brown when fresh, drying cinnamon brown.

Microscopic Features: Spores 7-12 × 3-5 µ; smooth; subfusoid.

Descriptions: [Create]


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The deprecated name is misspelled
By: Jacob Kalichman (Pulk)
2016-08-25 15:12:56 PDT (-0700)


I don’t understand what is going on
By: Oluna & Adolf Ceska (
2016-08-25 13:19:56 PDT (-0700)


Rank: Species
Status: Accepted
Name: Suillus tomentosus
Author: (Kauffman) Singer
Citation: Mycologia 51(4): 570 (1960) 1959
Deprecated Synonym(s): Sulillus tomentosus, Suillus

The accepted name is a Deprecated Synonym at the same time!

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