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Based on chemical features: sequence cited above

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A south-facing sloped lawn…
By: Dave W (Dave W)
2020-01-22 11:43:55 CST (-0600)

near my house produces at least a few of these each summer. Caps often feature a darkened disc. But I don’t remember ever seeing one with a dark brown cap, even when the cap is just barely emerging from the ground. I have also collected what I believe is the same species from open/grassy areas in at least two other locations (besides Moon Lake and my property). There are two isolated areas on my property where I find them; one with mature shagbark hickory and some young oaks in the vicinity, the other spot with mature shagbark hickory but no oak. In other locations they seem to be associated with mature oak. During NEMF 2018 I collected a pair growing on a lawn midway between a large oak and a large hickory.

The cap color… (edited)
By: I. G. Safonov (IGSafonov)
2020-01-21 22:34:28 CST (-0600)

…looks consistent with the species if one compensates for overexposure due to the bright light. The hues here are more brown than gray to my eye. The upper stipe appears to be very powdery, which is also typical of rooseveltensis.
This species is fairly common on my property, where it grows under very old pin/scarlet oak in grassy areas in early summer (one of the first mycorrhizal mushrooms to appear in June). Very young fbs, with their unexpanded caps just peaking above the ground, can be very dark brown (coffee brown).

Habitat not recorded.
By: Dave W (Dave W)
2020-01-21 21:59:37 CST (-0600)

But, I’d guess it was a somewhat open area with oak present. For club forays at Moon Lake we usually park our cars in one of four spots like this.

Thanks Dave,
By: groundhog
2014-09-16 11:31:42 CDT (-0500)

We have recieved this material and accessioned it to Rod’s Herbarium. We have scheduled it for DNA sequencing.
-Naomi

Your description of the difficulty in obtaining the volva is very consistent with my…
By: R. E. Tulloss (ret)
2014-07-16 07:32:23 CDT (-0500)

experience with this species.

I’m hoping that we can get to working on the DNA of this amanita before the end of the present year.

Very best,

Rod

“Old species 17” fits this material.
By: Dave W (Dave W)
2014-07-16 06:33:53 CDT (-0500)

There were quite a few of these at Moon Lake, all occurring in habitat similar to where I have collected “17” on my property.

There were a couple children on the club foray who enthusiastically gathered these but, of course, just broke off the stipe at ground level. Finally, I convinced one little girl to lead me to a specimen in-situ. Even when one is careful to extract this type, getting even some of the volval material is difficult.

How about rooseveltensis or “old species 17”?
By: R. E. Tulloss (ret)
2014-07-15 22:47:35 CDT (-0500)

R