Notes:
This small and dainty amanita with a distinct and pronounced tuberculate-striate cap margin and an exannulate stipe probably belongs in subsect. Pantherinae. It was found in pure deciduous woods dominated by beech, maple, tulip poplar and oak. The large amount of rain the area had received prior to the foray doesn’t justify the delicate frame of this species, so perhaps Nature just intended to make it on the small side. :-)
A NJMA Foray collection. Preserved for RET.

Images

Proposed Names

29% (1)
Recognized by sight
54% (3)
Used references: 1) Dave W’s comment/proposal below
2) www.amanitaceae.org

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= Observer’s choice
= Current consensus

Comments

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Herbarium Rooseveltensis Amanitarum (RET) has received specimen.
By: mcmacher
2017-11-02 12:37:49 CDT (-0400)

We have received the dried specimen. Thank you. It is being accessioned in Herbarium Rooseveltensis Amanitarum as RET 801-8.

PV in “sp-34”
By: I. G. Safonov (IGSafonov)
2017-08-22 20:01:32 CDT (-0400)

What you wrote makes total sense and I agree with you. The PV structure is likely to be non-membranous and so fragile that it never attaches itself to the stipe to leave a ring-zone, and when the cap expands, the torn remnants just fall off or simply disintegrate quickly.
I’ve never collected albocreata for I need to drive 100 miles either north or west to see hemlock woods, but even then NJMA probably rarely finds it at our northern NJ forays. As to “sp-34”, I’ve seen it a few times on MO but the name never registered as it’s another rare one in my area. Now, of course, I will remember having collected it for the first time. It’s a memorable critter by virtue of its small size and nonexistent PV.

I have had several discussions with Rod…
By: Dave W (Dave W)
2017-08-22 19:31:14 CDT (-0400)

regarding the presence/absence of pv on sp-34. He says the species has a fleeting pv, but I have never seen any evidence of this. I have observed some very young buttons in a spot on my property (but so far, not this summer).

Perhaps not unrelated to this, I have noticed that A. albocreata, an exannulate species, may feature a very thin slightly floccose coating over the gill edges. As soon as the cap expands and the gills spread out, the coating apparently breaks apart and leaves no trace on the stipe. Seems kinda like a pseudoveil, if that makes any sense (and if so… hey… a new word!). See obs 281869.

Thanks for the proposal, Dave
By: I. G. Safonov (IGSafonov)
2017-08-22 18:47:01 CDT (-0400)

Sp-34 is actually in subsect. Gemmatae. It’s funny I originally included that name in the notes, but then took it out before posting. Rod’s description says PV is present but often lost. Given the condition of the mushroom following the rainy weather, it’s conceivable the ring fell off prior to collection. I distinctly remember it being exannulate at the time of picking.

Although not typical for the species…
By: Dave W (Dave W)
2017-08-22 18:38:03 CDT (-0400)

fruit bodies of sect. Amanita sp-34 occasionally feature basal volval deposits. Other that the stipe base, this one looks like sp-34.