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Clitopilus hobsonii

Clitopilus hobsonii
Photo Information
Copyright: Laszlo Kaposvari (Hormon_Manyer) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1472 W: 308 N: 2610] (10251)
Genre: Fungi
Medium: Color
Date Taken: 2017-01-07
Categories: Fungi
Camera: Panasonic Lumix DMC-FZ50
Exposure: f/2.8, 1/640 seconds
Map: [view]
Photo Version: Original Version
Date Submitted: 2019-10-12 7:58
Viewed: 325
Points: 10
[Note Guidelines] Photographer's Note
Hi Trekkers,

Thank you very much for your comments on my previous post. As I'm heading for a 2-week holiday tomorrow, I'd like to say a "see you soon" with a species not only new to TN, but one which is, although presumably common worldwide, very difficult to get info of, from the internet. So, here it is:

Miller's Oysterling (Clitopilus hobsonii (Berk.) P.D. Orton)

Cap 2-15(-20) mm, convex, then irregularly shaped, plane, minutely tomentose, glabrescent, white.
Gills decurrent, medium spaced to distant, white then pink.
Stem absent or present, 1-1.5 x 1 mm, lateral or eccentric, white (observation from me: usually absent, if present at all, strongly reduced).
Smell farinaceous.
Habitat: single or in groups on dead plant material in deciduous forests, gardens, etc.; all year. Observation from me: usually on very thin, but already dead twigs, either still on the tree or on the ground, mostly late autumn / winter (from October to February).
Spore ellipsoid or ยฑ amygdaloid, with 3-12 longitudinal ribs, angular in polar view, thin- to slightly thick-walled, pale straw yellow in water, pink in mass. (6.5-)7.5-8.5(-10) * 5-5,5(-6) pm, ellipsoid, with 6-12, rather distinct longitudinal ridges.
Distribution in the Nordic countries: very common in temperate, common in hemiboreal, occasional in boreal - arctic/alpine zone (observation from me: recorded from each continent except for Africa and Antarctica, as per infos on GBIF portal).

Source: Knudsen, H. & Vesterholt, J. (ed.): Funga Nordica, Agaricoid, boletoid, clavarioid,
cyphelloid and gastroid genera, Nordsvamp, Copenhagen, 2012.

Similar species: the Variable Oysterling (Crepidotus variabilis (Pers.) P. Kumm.) is very similar in shape, although usually a little bigger sized (10-20 mm), and the gills are not pink but brown when mature (because it's a dark-spored species from the family Crepidotaceae {= Inocybaceae}). However, this is not always easy to recognize in situ, and their habitat is more or less similar. May be confused with some other, less frequent Crepidotus species as well.

Unterseher et al. (Species richness and substrate specificity of lignicolous fungi in the canopy of a temperate, mixed deciduous forest; Mycological Progress 4(2): 117โ€“132, May 2005) found the species occasional in the higher canopy, especially on lime (Tilia cordata). However, they used the name Pleurotellus chioneus (Pers.) Kรผhner, which is, as per Legon et al. (Checklist of the British & Irish Basidiomycota, Royal Botanic Gardens, Kew, 2018) "a nomen dubium (= dubious name) lacking type material and variously interpreted. Most of the British collections thus named in herbarium Kew are Clitopilus hobsonii" - so here I follow the latter authors.

Photo was done near Cork city, in the Curraheen riverside forest dominated by alder (Alnus sp.) and aspen (Populus tremula). No PP at all except for moderate cropping and re-sharpening of the gills after re-sizing to the TN-standard. ISO 100, f/2.8, 1/640 sec. in manual exposure mode.

In the next 2 weeks I may be here sometimes to put some comments. Thanks for looking at my image.

mamcg, lousat, Hotelcalifornia has marked this note useful
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Critiques [Translate]

  • Great 
  • mamcg Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 333 W: 13 N: 91] (9843)
  • [2019-10-13 7:09]

Nice catch, never seen such beauty in my life and me assessing the smell but may these species have no odor or aroma. Your NOTE has the full story along with MAP, TFS.

  • Great 
  • lousat Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 6595 W: 89 N: 15659] (65489)
  • [2019-10-13 12:20]

Hi Laszlo,lucky meeting with this not common species as i can read in your note,the best way to say us goodbye before to start your holidays,and the pic is absolutely the best talking about the quality,well done!Have a nice week and thanks,Luciano

Ciao Laszlo, lovely composition with nice specie on dark BG, fantastic light, wonderful colors, splendid sharpness and fine details, very well done, my friend, ciao Silvio

  • Great 
  • hsn6a Gold Star Critiquer/Gold Note Writer [C: 160 W: 0 N: 435] (8652)
  • [2019-10-15 23:07]


Hello Laszlo,
๐ŸŽŠ Congratulation for such new species.
Well captured keeping background semi dark. Excellent details and exposure. Note bit "Chinese" to me due to lack of knowledge ๐Ÿ˜‰. But well captured photograph, no doubt.
Like your "Passport" comment on my last picture ๐Ÿ™‚
Thanks for sharing,
Regards and have a nice weekend,

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