{{Taxobox
| color = lightblue
| name = ''Bolet de pi''
| image = Hypholoma fasciculare 040926w.jpg
| image_width = 200px
| image_caption = ''Hypholoma fasciculare'' Sulphur Tuft
| regnum = Fungi
| divisio = Basidiomycota
| classis = Homobasidiomycetes
| ordo = Cortinariales o Agaricales
| familia = Strophariaceae
| genus = Hypholoma
| species = '''H. fasciculare'''
| binomial = ''Hypholoma fasciculare''
| binomial_authority = (Huds.:Fr.) P. Kumm.
}}
300px|thumb|right|Una colònia de '''bolets de pi'''.
300px|thumb|right|'''Bolets de pi'''.
200px|thumb|right|Exemplars de '''bolets de pi'''.

El '''bolet de pi''' (''Hypholoma fasciculare'', del grec ''hyphos'' -filament- i ''lôma'' -franja-, i del colònies, a voltes d'una forma espectacular pel gran nombre d'individus reunits.

==Morfologia==

El seu barret és de rogenc per les espores que, abandonades pels exemplars que creixen al seu voltant, s'hi acumulen.

Les seues làmines, primerament grogues, en envellir passen a ésser verdoses i, finalment, d'un bru fosc.

La seua carn és groga i amarga.

==Hàbitat==

Viu damunt de soques i arrels podrides, no tan sols de pins, sinó també d'altra mena d'arbres. 

Amb més o menys abundor es pot trobar gairebé tot l'any.

{{Taxobox
| name = ''Hypholoma fasciculare''
| image = Hypholoma fasciculare 040926w.jpg
| image_width = 220px
| image_caption = ''Hypholoma fasciculare'' Sulphur Tuft
| regnum = Fungi
| divisio = Basidiomycota
| classis = Agaricomycetes
| ordo = Cortinariales or Agaricales
| familia = Strophariaceae
| genus = ''Hypholoma''
| species = '''''H. fasciculare'''''
| binomial = ''Hypholoma fasciculare''
| binomial_authority = (Huds.:Fr.) P. Kumm.
| synonyms = ''Naematoloma fasciculare'' <br/> ''Nematoloma fasciculare'' <br/> 
}}
{{mycomorphbox 
| name = Hypholoma fasciculare
| whichGills = free 
| capShape = convex 
| hymeniumType=gills
| stipeCharacter=ring
| ecologicalType=saprotrophic
| sporePrintColor=brown
| howEdible=poisonous}}
'''''Hypholoma fasciculare''''', commonly known as the '''Sulphur Tuft''', '''Sulfur Tuft''' or '''Clustered Woodlover''',  is a common woodland mushroom, often in evidence when hardly any other mushrooms are to be found.  This small gill fungus grows prolifically in large clumps on stumps, dead roots or rotting trunks of broadleaved trees.  

The Sulphur Tuft is bitter and poisonous; consuming it can cause vomiting ,diarrhoea and convulsions, and the death case by this mushroom is reported in Japan. The principal toxic constituents have been named fasciculol E and fasciculol F. [http://giftpflanzen.com/hypholoma_fasciculare.html]

==Taxonomy and naming==
The specific epithet is derived from the Latin ''fascicularis''  'in bundles' or 'clustered',<ref></ref>  referring to its habit of growing in clumps. Its name in Japanese is ''Nigakuritake''.

thumb|left|''Hypholoma fasciculare''|200px

== Description ==
The hemispherical cap can reach 6&nbsp;cm (2⅓&nbsp;in) diameter. It is smooth and sulphur yellow with an orange-brown centre and whitish margin. The crowded gills are initially yellow but darken to a distinctive green colour as the blackish spores develop on the yellow flesh. It has a purple brown spore print.<ref name ="Olerper77"></ref> The stipe is up to 10&nbsp;cm (4&nbsp;in) tall and 1&nbsp;cm (⅓&nbsp;in) wide, light yellow, orange-brown below, often with an indistinct ring zone coloured dark by the spores. The taste is very bitter, though not bitter when cooked, but still poisonous.
==Distribution and habitat==
''Hypholoma fasciculare'' grows prolifically on dead wood of deciduous trees and is widespread and abundant in northern Europe and North America. It has been recorded from eastern Anatolia in Turkey.<ref name=Dem04></ref> It can appear anytime from spring to autumn.<ref name ="Olerper77"/>