Inocybe petiginosa (Fr. : Fr.) Gillet + Picea

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Literature

references
  Agerer R (1995) Anatomical characteristics of identified ectomycorrhizas: an attempt towards a natural classification. In Varma AK, Hock B (eds) Mycorrhiza: Structure, function, molecular biology and biotechnology. Springer, Berlin, Heidelberg, pp. 685-734.
Ingleby K, Mason PA, Last FT, Fleming LV (1990) Identification of ectomycorrhizas. ITE Research Publication no. 5. HMSO, London.

Morphology

Morphology of the mycorrhizal system
length
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
3 mm    Upper value of unspecified range (could be µ+s.d., but not known)
ramification presence-type
  monopodial-pinnate
ramification orders
0     Lower value of unspecified range (could be µ-s.d., but not known)
2     Upper value of unspecified range (could be µ+s.d., but not known)
abundance
  solitary or in small numbers
main axis diameter
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
0.6 mm    Upper value of unspecified range (could be µ+s.d., but not known)
rhizomorphs as stout, short, conical structures presence-abundance
  absent
rhizomorphs presence
  absent
exploration type
  short distance
Morphology of the unramified ends
shape
  bent
or    sinuous
or    tortuous
shape {of distal end}
  not inflated, cylindric
colour
  white
very tip colour
  white
older parts colour
  brown
mantle {distinct} surface visibility
  present
mantle transparency
  not transparent
mantle laticifers visibility
  absent
mantle dots presence-colour
  absent
mantle carbonizing presence
  absent
mantle surface {in general} habit
  shiny
or    smooth
mantle surface {in detail} kind
  loosely cottony
Morphology of sclerotia
presence
  absent

Anatomy

Anatomical features of the entire mycorrhiza
blue granules presence
  absent
Anatomy of laticifers
presence
  absent
Anatomical features of the mantle
Anatomy of the outer mantle layer apart from the ectormycorrhizal tip
organisation
  plectenchymatous
mantle type
  hyphae arranged net-like, repeatedly and squarrosely branched (type E)
hyphal system kind
  with rather short, obtuse, even finger-like branches
hyphae hyphal junctions angle {between}
  ca. 120°
septa clamps presence
  absent
cell contents presence-kind
  oily droplets, which do not stain in sulpho-vanillin
cell diameter
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell wall surface habit
  smooth
Anatomy of the middle mantle layer
hyphae arrangement
  plectenchymatous, without pattern
Anatomy of the inner mantle layer
organisation
  plectenchymatous
hyphae arrangement
  without pattern
septa clamps presence
  absent
cell diameter
0 µm    Lower value of unspecified range (could be µ-s.d., but not known)
5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell length
0 µm    Lower value of unspecified range (could be µ-s.d., but not known)
15 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell contents presence-kind
  with oily droplets, which do not stain in sulpho-vanillin
Anatomy of the mantle in longitudinal section
mantle thickness {apart from tip}
20 µm    Lower value of unspecified range (could be µ-s.d., but not known)
40 µm    Upper value of unspecified range (could be µ+s.d., but not known)

Anatomy of the tannin cells in longitudinal section
presence
  present


Anatomy of the mantle in cross-section



Anatomy of the emanating elements in general
Anatomy of cystidia


Anatomy of emanating hyphae
shape
  not striking

Anatomy of the ramification of emanating hyphae
side-branches at septum number
  one side-branch at septum

Anatomy of the septa of emanating hyphae
clamps presence
  present
clamps hole presence
  absent

Anatomy of secondary septa of emanating hyphae
presence
  present
abundance
  abundant
distribution
  partially crowded

Anatomy of the cells of emanating hyphae
anatomy emanating elements emanating hyphae cell shape
  with ellbow-like protrusions
anatomy emanating elements emanating hyphae cell shape {at distal end}
  simple
anatomy emanating elements emanating hyphae cell diameter
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
3 µm    Upper value of unspecified range (could be µ+s.d., but not known)
anatomy emanating elements emanating hyphae cell wall surface habit
  smooth
anatomy emanating elements emanating hyphae cell wall thickness at tip {relative to remaining cell wall}
  thinner


Anatomy of rhizomorphs

Anatomy of hyphae in rhizomorphs
Anatomy of haustoria
{in foreign ectomycorrhizae} presence
  absent

Chemical reactions

reaction with cotton-blue-lactic-acid presence
  present

Ecology

geographic occurrence continent
  Europe

Tree

plant family
  Pinaceae
plant genus
  Picea
plant habitat kind
  nursery

Fungus

family
  Cortinariaceae
fruitbodies growth habit
  epigeous
or    pileate-lamellate

Remarks

public notes
  Mycorrhizal system with a frequent, irregular branching pattern; mycorrhizal ends white when young, slowly browning with age; emanating hyphae partially banded; mantle in cotton-blue with strongly staining hyphae.

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