Observation 112882: Lactarius deterrimus Gröger

When: 2012-10-06

Collection location: Trout Lake, Washington, USA [Click for map]

Who: Sava Krstic (sava)

No specimen available

Proposed Names

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“Main differences”
By: Christian (Christian Schwarz)
2012-10-26 08:04:25 NZDT (+1300)

I think that when considering mushroom ID in general, we should keep in mind that published differences are not the end of the discussion.

Many macroscopic differences have been overlooked in published keys in favor more esoteric features, often due to lack of broader experience, or any experience at all, or lack of really detailed observation.

That said, it would be good for Noah to explain.

Noah, you must have a keen eye,
By: Ron Pastorino (Ronpast)
2012-10-26 07:22:05 NZDT (+1300)
According to the Bessette book and the 2006 Nuytinck paper, the main difference between the two is the lack of macrocystidia in var. areolatus and possibly habitat…mostly spruce for deterrimus.
This looks more like
By: Noah Siegel (Noah)
2012-10-26 05:42:16 NZDT (+1300)
Almost impossible
By: Michael Wood (mykoweb)
2012-10-26 05:21:45 NZDT (+1300)

to keep up.

But I really don’t have a problem continuing using Lactarius deterrimus for our NA species until a new name is published. After all, they are morphologically virtually identical.

Thanks Mike, Interesting info
By: Ron Pastorino (Ronpast)
2012-10-26 05:14:45 NZDT (+1300)

even tho the Bessette book was published in 2009.
Guess it shows how hard it is to keep up and publish with all the new information
in this new age of molecular phylogenetic studies.

L. deterrimus is European
By: Michael Wood (mykoweb)
2012-10-26 04:51:34 NZDT (+1300)

The collections of North American “L. deterrimus” that have been sequenced do not match the European collections. The NA species needs more work and will need a new name. See:

Nuytinck, J., Miller, S.L. & Verbeken, A. (2006). A taxonomical treatment of the North and Central American species in Lactarius sect. Deliciosi. Mycotaxon 96: 261-307.

Nuytinck, J., Verbeken, A. & Miller, S.L. (2007). Worldwide phylogeny of Lactarius section Deliciosi inferred from ITS and glyceraldehyde-3-phosphate dehydrogenase gene sequences. Mycologia 99(6): 820-832.

And it certainly seems to be an accepted
By: Ron Pastorino (Ronpast)
2012-10-26 04:14:54 NZDT (+1300)

species in the US. The “Milk Mushrooms of North America” by the Bessettes and Harris list it as “fairly common” especially with spruce.

Let’s hear
By: Irene Andersson (irenea)
2012-10-26 03:46:34 NZDT (+1300)

what trees you have there first. L deterrimus could easily have been introduced – if it grows with Norway spruce.

Call it Lactarius deterrimus like!
By: ThKgk
2012-10-26 03:10:40 NZDT (+1300)

It is no Lactarius deterrimus, because L.deterrimus is a purely European species.

Created: 2012-10-09 21:19:23 NZDT (+1300)
Last modified: 2012-10-09 21:19:27 NZDT (+1300)
Viewed: 121 times, last viewed: 2018-01-20 16:34:08 NZDT (+1300)
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