Observation 285783: Amanita rhopalopus Bas

When: 2017-08-10

Collection location: Franklin Co., Virginia, USA [Click for map]

37.4269° -79.1565° 194m

Who: Cody Morgan (Cody)

No specimen available

Notes:
Habitat: mostly oak forest with a few scattered pines
Cap: white with scattered white UV remnants
Stem: white, peeling in various places with sort of a velvet like texture, slighty bulbous base, half of the stem on the larger one was buried in leaf litter and soil
The over mature one had a strong smell that was pretty unpleasant…no PV remnants noticed but maybe it had fallen off (all were pretty old exept the young one pictured)

Images

769989
769990
770569
770570
770571
770572

Proposed Names

28% (1)
Recognized by sight
-45% (2)
Recognized by sight: Sweet potato shaped bulbs, white veil material scattered on the ground around old FB’s from weak partial veil’s, strong unpleasant smell
41% (3)
Recognized by sight
Used references
-28% (1)
Recognized by sight
52% (3)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
I appreciate all the responses. Thanks.
By: R. E. Tulloss (ret)
2017-08-13 05:52:18 CEST (+0200)

Amanita rhopalopus and A. smithiana are the two species that are most morphologically similar to A. magniradix. All three contain the same, serious kidney toxin (a large amino acid that is not used as part of proteins). So they would be considerably likely to share a number of traits along with the radicating bulbs. If you look at images of rhopalopus on the WAO site, you’ll see there is a strong tendency for the universal veil to take on a sort of orange-brown color.

The deeper brown in some of the photos of this material is not something I have seen exactly.

I’m sorry to hear the material was lost. You will get another shot, I think. I have found magniradix repeatedly in a small area in New Jersey. You could really say it was coming up year after year in the same spot.

Very best,

Rod

Rod
By: Ryan Patrick (donjonson420)
2017-08-13 05:06:05 CEST (+0200)

Ill have observation 282271 coming your way towards the end of the season. Not sure if I got the whole bulb in that obsie but a valiant attempt was made!

Brown staining on cap margin
By: Cody Morgan (Cody)
2017-08-13 04:09:11 CEST (+0200)

The cap seemed to stain brown from drying/wind..I see this mentioned in the discription of magniradix but not rhopalopus. Can rhopalopus have this trait?

.
By: Cody Morgan (Cody)
2017-08-13 04:01:55 CEST (+0200)

That looks like a strong contender as well! The description of the bulb on rhopalopus seems to match better with this obs as well (one was much shorter). I couldnt save any of these sadly, they were all in pretty bad shape and smelled terrible! Its been raining so maybe ill see a few more. Thanks for your input rod, as always its much appreciated.

Since whole bulbs have been extracted, I would suggest another possibility…
By: R. E. Tulloss (ret)
2017-08-13 03:23:23 CEST (+0200)

A. rhopalopus.

Very best,

Rod

One thing worries me. I’ve never seen anyone get the whole bulb of…
By: R. E. Tulloss (ret)
2017-08-13 03:21:34 CEST (+0200)

magniradix. I would be willing to look at the DNA of one of the better preserved specimens if it were dried and sent to me…and if there were interest in the results.

Very best,

Rod

One thing worries me. I’ve never seen anyone get the whole bulb of…
By: R. E. Tulloss (ret)
2017-08-13 03:21:32 CEST (+0200)

magniradix. I would be willing to look at the DNA of one of the better preserved specimens if it were dried and sent to me…and if there were interest in the results.

Very best,

Rod

Thanks rod and ryan for the assistance!
By: Cody Morgan (Cody)
2017-08-12 00:21:54 CEST (+0200)

I was unable to get the last bit on the fresh one but Im pretty sure I got all of the one on the left (maybe both of the stems on the left)

I think A. magniradix is a very promising proposal.
By: R. E. Tulloss (ret)
2017-08-11 18:40:23 CEST (+0200)

It not only has a deeply rooting stem bulb; it also has a sterile margin of the cap extending beyond the ends of the gills. The latter seems present in this material. Nice that the photo caught that character. Take a big shovel (as suggested) and some kind of ointment for sore muscels. :)

Very best,

Rod

Bring a large shovel
By: Ryan Patrick (donjonson420)
2017-08-11 18:02:36 CEST (+0200)

And attempt to extract the entire bulb intact.

A. magniradix
By: Cody Morgan (Cody)
2017-08-11 17:58:19 CEST (+0200)

A. magniradix looks promising. I have my eye on the younger one pictured here and I will get better pictures of the root like bulb as soon as I get the opportunity.

Created: 2017-08-10 17:05:51 CEST (+0200)
Last modified: 2017-09-05 19:00:31 CEST (+0200)
Viewed: 132 times, last viewed: 2018-02-23 06:35:25 CET (+0100)
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