Observation 66973: Lentinus subgenus Lentinus sect. Lentinus
When: 2011-05-05
Collection location: Costa Rica [Click for map]
No herbarium specimen

Proposed Names

29% (2)
Eye3
Recognized by sight
56% (1)
Eyes3
Recognized by sight: “Pileal surface pilose-strigose, with ciliate margin… tropical and subtropical.”
Used references: Pegler, D. N. 1983. “The genus Lentinus: a world monograph.” Royal Botanic Gardens, Kew, London, England. 281 pp.
46% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Damon
By: Danny Newman (myxomop)
2012-06-03 04:34:02 CDT (-0400)

This is essentially where I’m at so far:

Pegler came out with a monograph in 1983. So far, I haven’t been able to find any publications that negate/trash-talk his findings. On the contrary, his suspicions of shared ancestry with polypores has held up nicely, and folks seem to continue to respect the way he grouped species, to some extent anyway. He put all the current Neolentinus in their own section (structured as Lentinus subgenus Panus sect. Squamosi) before Neolentinus was a published name.

There is one such section for “crinitoid” Lentinus, which he calls Lentinus subgenus Lentinus sect. Lentinus. As a side note, as far as a name for this section on MO, I think Lentinus sect. Lentinus would do just fine until or unless we have some reason to believe that Panus is a bogus grouping of things that really ought to be called Lentinus. Pegler’s method of differentiation is the presence of skeletal (Panus) vs. skeleto-ligative hyphae (Lentinus), a delimiter which may or may not hold any water in 2012. The common characteristics of this section are as follows:

conspicuously tapering skeleto-ligative hyphae, filiform toward apex
“pileus surface pilose strigose w/ white margin”

a section-specific key breaks individual spp. down from there.

The second line is in quotes because this copy of Pegler’s monograph — and perhaps all copies — are missing the other half of this really, really important couplet. This being Dennis Desjardin’s copy, he (or Herb Saylor, the original owner) has penciled in something that resembles the above sentence. Whether it is what Pegler intended to write or one of these men’s personal opinion is unclear. I intend to sort that out asap, as it throws a nasty wrench in the gears of the section I’m most concerned with. Since the first half of the couplet reads:

Pileal margin lacking fibrillose hairs, although pileal surface often squamulose:

I’m inclined to think that the other key choice must include something to the effect of Pileal margin with fibrillose hairs.

I’ll type up the sect. Lentinus key sometime soon, probably on either the L. crinitus or Lentinus name page. I’d do it now, but the my ride to the Sierra Nevada field course is precious few hours away, hours I need for sleeping and packing.

Excellent!
By: damon brunette (damonbrunette)
2011-05-06 16:18:00 CDT (-0400)

Let me know what you come up with as I have no experience with South American mushrooms. I spotted it in several places, so surprised it wasnt in the Halling books.

Lentinus reevaluation
By: Danny Newman (myxomop)
2011-05-06 15:27:14 CDT (-0400)

The name L. crinitus gets thrown around a lot. Anything that has a a convincing combination of its most recognizable characteristics (lignicolous; thin stiped; close, creamy white, decurrent gills; leathery/pliant; some degree of both umbillicate and hairy) gets given the same name, regardless of locale or the rather stark differences in appearance among them. I’ll have the chance to poke around the Switz volumes and some other wishlisted tomes later today. Perhaps they’ll shed some light on the diversity of the genus.

On the topic of this ob, I’d say you most definitely have a Lentinus, and very much one which it would be far from unusual to hear called L. crinitus. Whether or not this or any other could-be crinitus is in fact that species (especially those from the tropics/subtropics), I believe requires some further inquiry.

since myxo is onto Lentinus
By: damon brunette (damonbrunette)
2011-05-05 22:19:09 CDT (-0400)

is it possible that this is one? I found this in southern Costa Rica growing in small clusters on hardwood.

Created: 2011-05-05 22:15:40 CDT (-0400)
Last modified: 2013-07-02 05:35:15 CDT (-0400)
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