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Boletinus cavipes


Boletinus cavipes
Photo Information
Copyright: Marco Della Maggiora (Sarcodon) Gold Star Critiquer/Silver Note Writer [C: 124 W: 0 N: 37] (70)
Genre: Fungi
Medium: Color
Date Taken: 2006-02-20
Categories: Fungi
Photo Version: Original Version
Date Submitted: 2006-02-20 6:12
Viewed: 1915
Points: 8
[Note Guidelines] Photographer's Note
Introduction:
Where it grows it is very abundant, sometimes nearly weed. This specie grows exclusively under larch and it is easy to identify on the field. This kind of vegetative life is named “fixed symbiosis”.

Systematics:
Kingdom: Fungi
Division: Basidiomycota
Class: Basidiomycetes
Subclass: Agaricomycetidae
Order: Boletales
Family: Suillaceae
Genus: Boletinus
Species: Boletinus cavipes (Opatowski) Kalchbrenner

Nomenclatural informations:
Boletinus cavipes was published by Wilhelm Opatowski as Boletus cavipes on Commentation Historico-Naturalis de Familia Fungorum Boletoideorum (Berolini), pag. 11 in 1836. It was recombined by Károly Kalchbrenner in the Boletinus genus with a publication on Icones selectae 25, pag. 52 in 1867.

Synonyms:
Suillus cavipes (Opatowski) Smith & Thiers
Boletopsis cavipes (Opatowski) Hennings
Paxillus porosus Berkeley
Boletus ampliporus Peck
Boletinus cavipes var. aureus Rolland

Macroscopic features:
Pileus obtuse to convex expanding, usually with obtuse umbo. Surface dry, never viscid, densely tomentose to fibrillo-squamulose, dull yellow to red-brownish to dark brown. Margin involute with adhering veil. Context white at first, then yellow, soft, not changing to blue when bruised. Odour and taste not distinctive. Tubes decurrent with pores 0,6-2 mm wide, very lengthened, angular, radiating from the stipe. Stipe subequal to clavate, usually concolorous with pileus or paler, decored in lower part with veil remnants, at times with a slight annulus, typically hollow (inde nomen).

Microscopic features:
Spores 7-10 X 3,5-4 micron, smooth, narrowly ovate to ventricose in face view, nearly hyaline in Melzer’s. Basidia 4-spored, pleurocystidia scattered to numerous, subcylindric to fusoid-ventricose, cheilocystidia similar to pleurocystidia.

Habitat and vegetative life:
Gregarious to cespitose under larch (Larix decidua) in autumn. It is common and abundant everywhere there is the tree partner.

Possible confusions:
As written above about synonyms, I consider Boletinus cavipes var. aureus Rolland identical to Boletinus cavipes because I often found yellow specimens (var. aureus) mixed to red-brown specimens (tipus specie). Closed species are Boletinus asiaticus Singer and Boletinus pictus Peck: the first one has red decorations on the pileus and the second one has a ochre-red pileus and context changing to pink when exposed to air.

Hope you like.
petrudamsa, extramundi, Hormon_Manyer, jhm has marked this note useful
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Critiques [Translate]

Hi Marco.
I know of the existence of this specie in my country but never met it yet.
What is intriguing me is the fact that they split from boletes the Suillaceae family.
Not long before they were all Boletaceae, moreover almost all genera (Suillus, Xerocomus, Leccinum) were downgraded into synonimy with Boletus genus - at least in my identification book of Romanian mushrooms, they all are Boletus.
Well, the everchanging taxonomy... I just can't keep up the pace.

Regards, Petru

Hi Marco,
I can also tell what Petru did: I know this species exists, but never met it yet. The photo's well composed (except the narrow cropping), it shows everything of the mushroom from its "hat" to "flesh". Inspiring. Although, as said, if I were You, I should have zoomed out once more. Ciao, László

  • Great 
  • jhm Gold Star Critiquer/Gold Note Writer [C: 649 W: 0 N: 178] (628)
  • [2007-09-26 23:51]

Hello Marco,

I see Mister Marco that you are a specilist in mushrooms, a other member have you name.
I'm no macro specialist, more a landscape photographer, maybe know you the name of my mushrooms here on TN?
I look with a lot attention to your mushrooms, you did very well.

Have a nice day,
John.

You allways surprise us with interesting species, I liked very much to see this one. Thanks for your comments in other posts too, they are much appreciated.
Best regards, Felipe.

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