Observation 190382: Amanita citrina f. lavendula group
When: 2014-11-26
No herbarium specimen

Notes: I found a group of Amanita ‘gemmata type’ mushrooms with two distinct types. Type 1 smaller and Type 2 larger, more warts on the cap. Otherwise the two types are very similar and per most field guides would be identified as Amanita gemmata. These were fruiting in an area about 15 feet radius. See Observation 190571 for the smaller mushroom descriptions.

This observation is for the larger, type 2. The large on on the upper left of the 1st photo. Also, the smallest one is I believe the same type, just immature, but robust as can be seen in the size of the bulb at the base of the stem.

NOTEALL MEASUREMENTS ARE FOR THE MATURE SPECIMEN.

Spores –
White Spore Print – see photos
[20/1/1]L (7.5-)7.7-8.8(-9.0) μm x W (4.0-)4.1-4.9(-5.0) μm, (L’ = 8.3 μm, W’ = 7.7 μm), Q (-1.00)1.02-1.11(-1.14)), Q’=1.08

Microscopy –
I can see that the basidiums hold 4 spore.

Chemical – no reaction to KOH.

Cap – pale yellow, dry, dull surface with numerous med-brownish warts – P. V. remnants. Slight bits of veil at edges. Veil pieces white. Gills slightly gray compared to the very white flesh of the cap. Cap skin peels easily. Shape – convex, almost plane. Flesh gradually thins toward edge. Not striate, some lines at edge show because the edges are beginning to desiccate. Cap shape, see photos.
Cap Size – 5.6 cm
Cap Thickness – 0.8 cm

Gills – slightly grayer than white flesh, very thin connecting section seen on stem (~0.2 mm), adnate with deep notch. Crowded. See photos
Gills Breadth – 4 mm max

Smell – mild mushroom

No bruising seen other than a little browning at insect attacks.

Ring – can see where ring was connected in mature mushroom with a bit of the annulus still clinging. In the immature mushroom, the ring is still in place although fragile.

Stem – almost constant section, widening sum toward the base.
Stem width at mid-stipe: 10 mm
Stem length ( to bulb) 11.0 cm

Ring – tiny bit on stem – white – can see where ring was attached. Immature specimen has ring.

Base of Stem – Bulbous base with fragile volva material seen at edges and in the soil around the base. No staining or bruising. Color – like stem – shape – see photos.
Length of Bulb – 20 mm
Width of Bulb – 25 mm

Odor: mild mushroom odor. Did not taste.

Ecology – soil mix of sand (from dry stream next to the mushrooms) red clay and forrest debris, decay. Mostly Short-leaved Pine and Loblolly Pine nearest. Sweet Gum and mixed hardwood shrub.

Images

486063
20141126-NIKON_2014DSC_7042.jpg
486064
20141126-NIKON_2014DSC_7041.jpg
Mature specimen on the left, immature in the center.
486065
20141127-LX1_2014P1040147.jpg
486071
20141127-NIKON_2014P1040140.jpg
1- Gill- w cap top – section – squash mount-1000x – Basidium ?
486072
20141127-NIKON_2014P1040125.jpg
2- Gill- w cap top – section – squash mount -1000x – Clamp Connection?
486073
20141127-NIKON_2014P1040133.jpg
3- Gill- w cap top – section – squash mount -1000x – unknown
486074
20141126-NIKON_2014DSC_7039.jpg

Proposed Names

56% (1)
Eye3
Used references: www.amanitaceae.org, www.mushroomexpert.com
Based on microscopic features: spore shape and size
Based on chemical features: no reaction to KOH

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2014-11-28 13:42:18 CST (-0600)
Last modified: 2015-01-23 14:54:13 CST (-0600)
Viewed: 39 times, last viewed: 2016-10-17 19:26:11 CDT (-0500)
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