Observation 174573: Suillus acidus (Peck) Singer
When: 2014-08-08
No herbarium specimen

Notes: Cuticle with acidic taste.

NEMF foray.

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Thanks Walt.
By: Dave W (Dave W)
2016-03-27 00:36:33 GMT (+0000)

Like you say, obs 175832 was unusually dark-colored. So even when “species lumping” seems to simplify things, there’s always the occasional collection that doesn’t seem to fit in.

they are the same
By: walt sturgeon (Mycowalt)
2016-03-26 20:09:18 GMT (+0000)

according to Alan Bessette and Index Fungorum (see below).

I have never seen it as dark as your collection, 175832

Suillus acidus (Peck) Singer, Farlowia 2: 271 (1945)

Synonymy:
Boletus acidus Peck, N.Y. St. Mus. Ann. rep. Reg. 59: 15 (1905)
Suillus acidus (Peck) Singer, Farlowia 2: 271 (1945) var. acidus
Suillus acidus var. intermedius A.H. Sm. & Thiers, Monogr. North Amer. Species Suillus: 74 (1964)
Suillus acidus var. luteolus A.H. Sm. & Thiers, Boletes of Michigan (Ann Arbor): 55 (1971)
Suillus acidus var. subalutaceus A.H. Sm. & Thiers, Monogr. North Amer. Species Suillus: 75 (1964)
Suillus intermedius (A.H. Sm. & Thiers) A.H. Sm. & Thiers, Boletes of Michigan (Ann Arbor): 56 (1971)
Suillus subalutaceus (A.H. Sm. & Thiers) A.H. Sm. & Thiers, Boletes of Michigan (Ann Arbor): 57 (1971)

Walt, is this to say…
By: Dave W (Dave W)
2016-03-26 15:59:24 GMT (+0000)

that intermedius and subalutaceus have now been lumped under the name acidus?

Yeah Walt. I remember your subalutaceus proposal…
By: Dave W (Dave W)
2014-08-20 02:10:53 BST (+0100)

for this one. For this post I went with the BRB concept of intermedius as the acidic tasting type. The two species are otherwise similarly described.

Dave
By: walt sturgeon (Mycowalt)
2014-08-19 15:07:23 BST (+0100)

In my experience the darker capped species or variety also has acidic tasting gluten. It also is more common in Northern areas. The big bolete book says S. subalutaceus has a mild tasting gluten. I wonder if these two are not varieties of the same species.

Created: 2014-08-19 13:59:17 BST (+0100)
Last modified: 2016-03-26 15:22:54 GMT (+0000)
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