Observation 24575: Amanita sect. Amanita

When: 2009-08-18

Collection location: Laguna Honda, San Francisco, California, USA [Click for map]

Who: Micah Courteau (waynegrompsky)

Specimen available

growing beneath Pine trees, white spore print, Annulus present on the stem of matured specimen.

[admin – Sat Aug 14 02:01:59 +0000 2010]: Changed location name from ‘Laguna Honda, San Francisco, CA USA’ to ‘Laguna Honda, San Francisco, California, USA



Proposed Names

39% (4)
Recognized by sight
56% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Looking back…
By: R. E. Tulloss (ret)
2009-12-17 10:10:13 PST (-0800)

Accidentally came upon this page and realized that the “East Coast” has been dry land for a very much longer time than has the land west of the big mountain ranges of the West. An interestingly large number of east Asian species share ancestors with eastern North American species suggesting that descendants of these ancestors were able to migrate across a temperate Beringia and temperate northern Canada on a land bridge as far back as dinosaur times…dinosaurs were taking the same route.


numbers on the coasts
By: R. E. Tulloss (ret)
2009-08-24 08:57:40 PDT (-0700)

I think Steve Trudell pointed out in an MO comment that there were about five times as many mycorrhizal hosts on the east coast as on the west. This is probably correlated to significantly greater diversity of mycorrhizal fungal taxa on the east coast. Perhaps, some one can correct me on the correct multiplicative factor with regard to host trees. My personal guess regarding the ratio of EC:WC amanita diversity is between 3.5 and 4.

Very best,


cool Amanita
By: AmatoxinApocalypse (AmatoxinApocalypse)
2009-08-21 20:39:47 PDT (-0700)

There tons of awesome Amanita on the east coast, including A. pantherina group.

How come you guys have so many more cool amanitas than we do out East?
By: Paul Derbyshire (Twizzler)
2009-08-21 19:13:50 PDT (-0700)

it just doesn’t seem fair…:)

Created: 2009-08-20 03:44:53 PDT (-0700)
Last modified: 2015-03-14 13:32:28 PDT (-0700)
Viewed: 122 times, last viewed: 2017-06-06 00:02:54 PDT (-0700)
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