Observation 25124: Amanita peckiana Kauffman
When: 2009-07-14
No herbarium specimen

Notes: Dr. Tulloss suggested this is in section Amidella

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Comments

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grayish gills on a dried Amidella
By: R. E. Tulloss (ret)
2009-09-13 11:25:42 CDT (-0500)

Patrick, your material from observation 25124 arrived with grayish gills. You probably noted this when you took it out of the drying process. This was once considered a definitive character for taxa in sect. Amidella…until it was noted that Singer’s collections always had almost completely white gills. I experimented with dryer temperature and discovered that drying an Amidella slowly produces grayish gills; however, drying an Amidella quickly (say cranking the temperature up a bit) will produce dried specimens with white gills. Drying amanitas quickly also is more likely to leave the tissues of the gills in a condition in which the cells can be successfully reinflated for microscopic examination.

Very best,

Rod

A. peckiana
By: Patrick Harvey (pg_harvey)
2009-09-11 22:15:36 CDT (-0500)

Thanks very much for your comments, Dr. Tulloss. I’ll know what details to look for next time.

I’ve also sent a specimen to you for an Amanita amerirubescens, observation #25023.

Well, I still think it makes a good Amidella
By: R. E. Tulloss (ret)
2009-09-11 18:50:48 CDT (-0500)

Notice that the cap escapes from the universal veil because of a friable inner layer of the u.v. Also, the stipe seems to be totally elongating. The rather weak staining of the cap after species has been collected and carried about at bit suggests A. peckiana.

If we could see down inside the volval sac, we might be able to divine a little more knowledge. Amanita peckiana often has the bottom of the stipe separating as if it were a second limb of the universal veil.

Very best,

Rod

Created: 2009-09-11 16:57:09 CDT (-0500)
Last modified: 2009-09-11 16:57:09 CDT (-0500)
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