Observation 71510: Inocybe stellatospora (Peck) Massee
When: 2011-06-30
Herbarium specimen reported

Notes: Herbarium Specimen: UBC F23676

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Thanks again
By: Irene Andersson (irenea)
2011-07-17 00:41:36 HST (-1000)

Very helpful, it makes me more confident with stellatospora. I had a closer look at the description of teraturgus again, and aside from the larger spores, it seems to have paler and less contrasting scales too. It’s hard to find good pictures of these species on the web..

Type of Inocybe stellatospora
By: Oluna & Adolf Ceska (aceska@telus.net)
2011-07-16 21:50:34 HST (-1000)

Matheny & Kropp 2001 selected a part of Peck’s type collection (NYS – New York State Museum) as a lectotype of I. stellatospora. They list I. longicystis Atk. as a synonym of I. stellatospora.

My specimen has spores 8-9(10)x 6-7(8)µm, i.e., within the range of I. stellatospora. According to Matheny & Kropp, Inocybe teraturgus should grow in Sphagnum and should have larger spores: 10-12.5 × 7.5-10 µm.

In the Matheny & Kropp concept, Inocybe lanuginosa has pleuro- and cheilo-cystidia “obovate, pyriform to broadly clavate” and equals to what used to be called “I. ovatocystis”.

Judging from the spore size, your obs 49245 is most probably Inocybe stellatospora. Matheny & Kropp cite two Stangl’s collections of I. stellatospora from Sphagnum in Bavaria, i.e., I. stellatospora occurs in Sphagnum as well. – Oluna

Thanks Oluna
By: Irene Andersson (irenea)
2011-07-15 22:07:29 HST (-1000)

Do you recall if they mentioned any type collection of stellatospora? I can’t find any record of it.

I have an obs, which I was hesitating to give that name, because there are many similar species in this group, and I’m not familiar with them. I. teraturgus was another option..
If you like to take look at obs 49245, does it look similar in the microscope?

Inocybe stellatospora – syn.: I. longicystis
By: Oluna & Adolf Ceska (aceska@telus.net)
2011-07-14 08:07:21 HST (-1000)

I am following Matheny P. B. B. R. Kropp 2001 (A revision of the Inocybe lanuginosa group and allied species in North America. Sydowia 53: 93-139)who synonymized Inocybe longicystis with I. stellatospora. – Oluna

A question
By: Irene Andersson (irenea)
2011-07-14 04:57:40 HST (-1000)

Do you consider Inocybe lanuginosa var. longicystis a synonym or a different species?

Created: 2011-07-13 09:57:40 HST (-1000)
Last modified: 2011-07-13 09:57:40 HST (-1000)
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