Observation 191982: Amanita sect. Lepidella sensu Bas
When: 2014-11-16
(21.4055° -158.098° 778m)
No herbarium specimen

Notes: Observed growing in mixed native and alien tropical insular lowland mesic forest, alongside moss in ironwood (Casuarina sp.) litter at the base of a rock face on the west side of the trail. Images recorded but no measurements made; specimen not collected. Following description compiled via inspection of images:

Cap convex to slightly umbilicate, light brown center fading to cream color toward the margins, densely scaly/patchy texture, ~ 6 cm broad with appendiculate margin. Stem white, thick (~ 15 mm) equal diameter to slightly club-shaped, rough or scaly texture with pendant annulus. Gills not observed.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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The appendiculate cap margin (cap margin with “goop” hanging from it)…
By: R. E. Tulloss (ret)
2015-01-17 18:37:29 PST (-0800)

is part of the definition of section Lepidella.

Another is that the spores darken in Melzer’s Reagent (a solution of iodine and potassium iodide).

A third is that, with few exceptions, there is not a firm membranous flap rising from the bulb at the base of the stem.

Your material is somewhat like A. austrostraminea as far as one can see. I worked the previous collection up fairly thoroughly by microcope and a colleague derived some DNA sequences for me as well (although we didn’t have anything with which to compare those sequences at the time).

I see similarities; however, many, many lepidellas are white or whitish, all have an appendiculate cap margin. The greatest likelihood is that the material of your present observation has been imported with one or more of the trees of Australian origin in the forest you describe.

Very best,

Rod

Amanita sect. Lepidella sensu Bas and Amanita austrostraminea D.A. Reid
By: Allen Hoof (allenhoof)
2015-01-17 16:47:34 PST (-0800)

There are some interesting visual similarities between the second image posted to this observation and the first (collection site) image posted in

http://mushroomobserver.org/140574

Thank you for taking the time to respond.
By: R. E. Tulloss (ret)
2014-12-07 13:47:43 PST (-0800)

It’s clear to me that you are developing an understanding of the naming of parts, which is a necessary first step.

The protection of trails in an environment that has been ravaged and has lost so much of its biodiversity is completely understandable.

Some day you may be in an appropriate ecosystem with permission to collect the fruiting bodies of some fungi.

Very best,

Rod

I know what a mushroom looks like – usually
By: Allen Hoof (allenhoof)
2014-12-07 11:19:54 PST (-0800)

Rod,

Beyond being able to recognize a “standard” (cap, stem) mushroom when I see one, I essentially know nothing of mycology. Even if I can recognize a species by sight, and cite its Genus-species name, the name conveys no understanding of the place of that mushroom/fungus in the universe of fungi, because I lack even a rudimentary knowledge of mushroom/fungi taxonomy, its “organization chart” or the bases for its sub-classifications.

One thing I think I do know, from looking at pictures, it that there can be some variation in appearance between individuals of the same species. Consequently, working on the basis of appearance alone, I could not with any certainty recognize another of this species if I saw it.

Also, I can’t immediately returned to the site of this observation. Access to Palikea-Palehua Trail is controlled. I’ve been able to hike there by invitation twice: in 2003 and last month. There is thus no possibility of collecting material from this individual, or its nearby kin/descendents.

The only thing I can contribute is imagery of three other, mutually dissimilar-appearing mushrooms observed at about 75 meter intervals along the same trail on the same day in the same environment.

Allen

Within the last year we found a second Lepidella from Hawaii (via MO).
By: R. E. Tulloss (ret)
2014-12-06 20:14:20 PST (-0800)

The first species was not mycorrhizal, but the second was associated with alien trees. The latter species was identified as Amanita austrostraminea (originally described from Australia).

It would be very interesting to check out the material that you have photographed…if you happen to see it and can collect and dry it.

Very best,

Rod

Created: 2014-12-05 22:57:04 PST (-0800)
Last modified: 2016-06-21 14:35:25 PDT (-0700)
Viewed: 104 times, last viewed: 2016-10-21 23:26:40 PDT (-0700)
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