Observation 25635: Amanita citrina (Schaeff.) Pers.
When: 2009-09-18
Herbarium specimen reported

Notes: Brownish/grayish cap with numerous volval patches. Basal bulb split as in A. brunnescens. Ring on stalk shows gray on underside. Spores globose. Forgot to note whether spores were amyloid; but pic (mounted in Meltzer’s) looks like they had darkened. Conifers, mainly Norway Spruce. Pics taken indoors, so color off a bit.

[admin – Sat Aug 14 02:01:57 +0000 2010]: Changed location name from ‘Lackawanna County, PA, USA’ to ‘Lackawanna Co., Pennsylvania, USA

Proposed Names

34% (2)
Eye3
Recognized by sight
ret
75% (2)
Eyes3
Recognized by sight

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Comments

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Thanks David,
By: groundhog
2014-04-25 14:08:48 PDT (-0700)

This material has been accessioned to Rod’s herbarium.
-Naomi

hypermagenta
By: R. E. Tulloss (ret)
2009-10-09 10:42:32 PDT (-0700)

THANKS, Dave!

Take a picture of an American"_citrina_" and view it in Photoshop.
Using the appropriate adjustment tool (saturation), select “magenta” and set the slide for maximum saturation of magenta. If you have f. lavendula AND IF the lavender staining has occurred on the fruiting body in a part that shows in the photograph, you will find that strong magenta spots will appear on the various lavender tinted areas of the fruiting body. You will often find lavender spots or bruises on f. lavendula from material that has been exposed to night time temperatures near (but above?) freezing…certainly below 40 degrees F. My refrigerator does not simulate the effect. I think one may need to try the freezer compartment. In a recent year at Wildacres (NC) we had a night with temperature very close to freezing. The next day, the lavender staining on the specimens of f. lavendula was the most intense I have ever seen.

Take a look at the f. lavendula page on the Amanita Studies site. The most dramatically lavender specimen from that day at Wildacres is depicted on that page.

R.

I’ve got this one
By: Dave W (Dave W)
2009-10-09 04:51:30 PDT (-0700)

stored and MO referenced along with all the others. After the frost finally puts an end to this years fungal frenzy (one of the best years I’ve seen) I’ll send the whole lot.

“hypermagenta” test?
By: Dan Molter (shroomydan)
2009-10-08 21:11:31 PDT (-0700)

I also thought citrina when I first saw this OB, but the cap warts seemed too exquisite. Looking again after Rod’s comments I see citrina for sure!

What is “hypermagenta” test?

pale citrin annulus with gray volval material…
By: R. E. Tulloss (ret)
2009-10-08 19:04:17 PDT (-0700)

belongs in the Amanita citrina cluster. Note the cap color is pale yellowish and the patches of volva are getting rusty.

If you have a chance to send this, Dave, I’d like to check out the spores. I tried the “hypermagenta” test for lavendula. It came out negative. There are at least two things called citrina in the Americas. I can tell the two eastern N. American taxa apart by spore size…so far.

R.

R.

Created: 2009-09-24 17:28:12 PDT (-0700)
Last modified: 2011-03-30 12:37:21 PDT (-0700)
Viewed: 80 times, last viewed: 2016-10-23 00:43:04 PDT (-0700)
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