Observation 141676: Amanita sect. Vaginatae sensu Zhu L. Yang
When: 2013-08-01
Herbarium specimen reported

Notes: Yellowish-grey to greyish-white cap drying greyish-brown.(Methuen 6D3 and 7D3 for the grweyish-brown). Pileus 95mm Dia. × 5mm thick, with a small darker umbo, orbicular with a plane margin. Striations were 30/47. caps dry, dull and non-appendiculate. No detectable odor or taste. Context, white with no staining, was 4mm thick in the center to non measurable 22mm from center. The pileal striations were sulcate with some of them being forked 12mm from the margin and others forked 5mm from the margin. No UV remnants on the pileus, but there appeared to be very fine appressed fibrils near the disk. No staining or bruising reaction. Lamellae were white with white faces. Gills appeared to be adnate and left seceeding lines on the stipe apex,and close to subdistant.Lamellulae were plentiful with some being very short near the margin; others 1/2 to 3/4 the length of the lamellae. The stipe was white, solid to stuffed, tapered slightly towards the apex, had many brownish hairs on it, and was 130mm from apex to the bottom of the base. The volva was white and tough, sac-like; peeled easily and was not attached to the base. The distance from the base to the top of the volva was 32mm. No annulus present. Found on a lawn on a wet day. Surrounding trees were predominately Oak. Spore print white.

Proposed Names

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Recognized by sight: Greyish-brown to yellowish-

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Thanks Phil,
By: groundhog
2013-08-16 21:07:54 CEST (+0200)

This material has been received and accessioned into Rod’s herbarium.
-Naomi (working with RET)

Hello, Phil. Thanks for calling my attention to this observation.
By: R. E. Tulloss (ret)
2013-08-03 06:54:20 CEST (+0200)

This species is probably what Dave W. calls my “old number 17.” If that is the case the spores should be broadly ellipsoid to ellipsoid.

I would be interested in seeing your dried material. I’m hoping to get to DNA sequencing of species in section Vaginatae. If that becomes possible, material of this species should be fairly near the top of the list.

Very best,


Created: 2013-08-02 23:36:46 CEST (+0200)
Last modified: 2016-07-05 15:22:32 CEST (+0200)
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