Observation 90778: Trichaptum abietinum (Dicks.) Ryvarden
When: 2012-03-23
No herbarium specimen

Notes: This specimen was surprisingly more spectacular underneath than on the sun faded/dried out cap. Found on conifer log- hence “abietinum.” T.biforme is found on hardwoods.

Temp: mid 50’s sunny.

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Hi Irene, I realize this conversation is several years old,
By: Andrew Khitsun (Andrew)
2016-06-30 20:57:18 PDT (-0700)

but I just came upon it, and found out that the first link in your reference below is dead (damn websites – can’t they just stay put :-( I was wondering if you know where it moved, if that’s the case. Thanks!

Thank you-
By: Drew Henderson (Hendre17)
2012-03-25 10:44:06 PDT (-0700)

for the continued help Irene :) Much appreciated! Don’t know if your Spring season in Sweden is similar to here in Washington state, but I wish you the best of luck with Morels and porcini this year ;)

In North America
By: Irene Andersson (irenea)
2012-03-25 00:47:32 PDT (-0700)

you have 5 known species of Trichaptum:

abietinum (mainly on conifers)
fusco-violaceum (mainly on conifers)
laricinum (conifers)
biforme (hardwoods)
subchartaceum (poplar)

here’s one attempt to show how they have evolved:

and this is a kind of follow-up from Norway..

Thanks Irene-
By: Drew Henderson (Hendre17)
2012-03-24 23:43:49 PDT (-0700)

Didn’t really know any other Trichaptum other than T.biforme and T.abietinum… Til this point :) Appreciate the clarification and help.

Trichaptum is a frustrating genus
By: Irene Andersson (irenea)
2012-03-24 05:11:54 PDT (-0700)

and extremely polymorphic with lots of different forms. In Fennoscandia we probably have several hybrids that look like intermediates between abietinum, laricinum and fuscoviolaceum. Lots of investigations have been done, but without conclusions about delimitation of species..

Just thought I should mention that abietinum (or is it fuscoviolaceum..?) can occur on hardwoods too.

Created: 2012-03-23 15:27:26 PDT (-0700)
Last modified: 2012-03-23 15:27:29 PDT (-0700)
Viewed: 227 times, last viewed: 2016-10-23 08:04:28 PDT (-0700)
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