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07-01-2026 10:24

Danny Newman Danny Newman

Pezicula sp. on indet. hardwood Appalachian Highl

07-01-2026 22:22

Danny Newman Danny Newman

Tatraea sp. on indet. hardwood The Swag, Great Sm

07-01-2026 17:29

Marc Detollenaere Marc Detollenaere

Dear Forum,On a barkless Populus I found some smal

10-11-2021 17:33

Riet van Oosten Riet van Oosten

Add-on topic http://www.ascofrance.com/forum/7059

07-01-2026 10:05

Danny Newman Danny Newman

cf. Chaetospermum on XylariaCosby Campground, Grea

06-01-2026 20:54

Thierry Blondelle Thierry Blondelle

Bonjour à tous et meilleurs voeux pour cette nouv

02-01-2026 17:43

MARICEL PATINO

Hi there, although I couldn't see the fruitbody, I

04-01-2026 17:45

Stephen Martin Mifsud Stephen Martin Mifsud

I was happy to find these orange asmocyetes which

02-01-2026 22:48

éric ROMERO éric ROMERO

Bonjour tous, Je profite de cette nouvelle demand

02-01-2026 19:35

William Slosse William Slosse

Good evening everyone,First of all, my best wishes

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cf. Rodwayella on Rhododendron maximum
Danny Newman, 15-12-2025 11:49
Danny Newman
ITS sequences from the following two collections BLAST together as 99.82% similar:


https://www.inaturalist.org/observations/179610784


both were found occuring on Rhododendron, and both are from essentially the same locality (Purchase Knob, Great Smoky Mountains National Park, North Carolina, USA).  Only one has micrographs at the moment, though measurements are still lacking.  This will soon be remedied.

photo credits: Connor Dooley
micrographs: Danny Newman

Any and all ID assistance is greatly appreciated.  More micrographs are available upon request for the newer collection (303197504), which will soon be sent to Patrick Verdier for a more comprehensive workup.  The earlier collection was previously posted in the Ascomycetes of the World FB group here: https://www.facebook.com/groups/ascomycetes/posts/3795982970653879/.  In the meantime, we are wondering if the information provided thus far is sufficient for even a genus ID.
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Hans-Otto Baral, 15-12-2025 12:13
Hans-Otto Baral
Re : cf. Rodwayella on Rhododendron maximum
I consider this R. sessilis. This species is variable in its rDNA, one of yours is in the attached alignment. We have an aff. rhododendricola which is very distant from this. I am not sure if rhododendricola is the same as sessilis which seems to be plurivorous.
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Danny Newman, 15-12-2025 13:20
Danny Newman
Re : cf. Rodwayella on Rhododendron maximum
Thank you Zotto.  I am curious to know more about the known distribution of R. sessilis s.s., as I can find few records of it from outside Oceania, despite it being first described ~100 years ago.  Do any of the entries from your 'Rodwayella - Remleria' folder correspond to this species?  If so, are they from countries other than Australia/New Zealand/Tasmania?  Would it be overzealous to state that our collections are the first to expand the species' known range into the Americas?
Hans-Otto Baral, 15-12-2025 15:07
Hans-Otto Baral
Re : cf. Rodwayella on Rhododendron maximum
It is actually strange that this species is unknown from European reports. My databse has it only for the two Australian records and a very recent one in France (Mombert et al. 2025, Ascomycete.org 17: 18), but no more than a short note.

My folder contains only European records. DNA isolates are known from New Zealand (Nothofagus). Luis has sequences from apothecia from Tenerife. 

The species may have been overlooked because it is drought-tolerant, occurring on attached twigs.