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When: 2008-10-04
Collection location:
Larch Mountain, Multnomah Co., Oregon, USA [Click for map]
Who:
Daniel B. Wheeler (Tuberale)
No herbarium specimen
Notes: I’m confident that both these fungi are Amanitas, even though the volva is not visible in the first photo. Both are pale pinkish-gray, with the second picture being a separate specimen also showing the saclike volva much better. Second picture also has slightly umbonate cap, and shows edge striations on cap better. Stipe with white scruffy scales on a very light grayish-white stipe. Once again in Aurora keys out to A. velosa, which I don’t believe I have in my area.
Comments:
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Created: 2008-10-06 12:44:21
By: Rod Tulloss (ret)
Summary: species of sect. Vaginatae
We have several recent postings of various taxa of “grisettes” (species of sect. Vaginatae). Many of these taxa have not been described. A good color photograph is not obtained without effort. Given that effort, collecting and drying the subject of the photograph is a small additional act. That additional act can make it possible for these pictures to get names put on them. I feel terribly frustrated with “cf. vaginata”, “the vaginata-group,” etc.
Given the large area of the world from which MO draws contributions, MO should be given the chance to maximize its potential impact on taxonomy. This would be most likely to happen if (as an example) all “grisette” pictures were backed with well-preserved herbarium specimens.
The key at
http://pluto.njcc.com/...
Covers a larger number of taxa than Arora. Try looking at the part relevant to sect. Vaginatae. The key is certainly provisional and does require microscopy, but you can use it to learn more options than you now know. The key utilizes (to the degree possible) unpublished data from decades of collecting by people such as A. H. Smith and a number of West Coast collectors (including MO participants).
R
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Created: 2008-10-05 09:59:37
By: debbie viess (amanitarita)
Summary: yes. vaginata is the type specimen for section vaginata, which includes the grisettes.
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Created: 2008-10-05 08:43:22
By: Daniel B. Wheeler (Tuberale)
Summary: Is A. vaginata a grisette?
Just found another observation under A. vaginata which looks amazingly similar.
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Created: 2008-10-05 08:41:21
By: debbie viess (amanitarita)
Summary: It’s another lovely grisette, and certainly NOT a velosa.
This is a big group that needs work; no key exists that will name them all.
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Created: 2008-10-05 06:22:46
By: Paul Derbyshire (Twizzler)
Summary: Order reversal
Actually, the first photo is the one that shows the features better.
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Observation Created: Sun Oct 05 06:12:15 -0700 2008
Last Modified: Sun Oct 05 06:12:15 -0700 2008 by Daniel B. Wheeler (Tuberale)
Viewed: once, last viewed: Tue Nov 18 04:12:01 -0800 2008
Show Log
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Images:
 Amanita sp. Pers. (24014)
 Amanita sp. Pers. (24015)
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