Lactarius caespitosus Smith & Hesler + Abies

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Literature

references
  Kernaghan G, Currah RS, Bayer RJ (1997) Russulaceous ectomycorrhizae of Abies lasiocarpa and Picea engelmannii. Can J Bot 75: 1843-1850.

Morphology

Morphology of the mycorrhizal system
ramification presence-type
  monopodial-pinnate
rhizomorphs presence
  present
rhizomorphs frequency
  infrequent
Morphology of the unramified ends
colour
  green
or    white
mantle {distinct} surface visibility
  present
mantle transparency
  semi-transparent, opaque
mantle surface {in general} habit
  smooth
emanating hyphae presence
  present
emanating hyphae abundance
  infrequent
Morphology of rhizomorphs
diameter
0.03 mm    Lower value of unspecified range (could be µ-s.d., but not known)
0.2 mm    Upper value of unspecified range (could be µ+s.d., but not known)
colour
  concolourous to mantle
or    green
or    whitish

Anatomy

Anatomical features of the entire mycorrhiza
emanating elements presence-type
  rhizomorphs
Anatomy of laticifers
presence
  absent
or    present
location
  inner mantle layer
cell length
4 µm    Lower value of unspecified range (could be µ-s.d., but not known)
11 µm    Upper value of unspecified range (could be µ+s.d., but not known)
Anatomical features of the mantle
matrix presence
  present
matrix location
  outer mantle layer {apart from tip}
Anatomy of the outer mantle layer apart from the ectormycorrhizal tip
organisation
  plectenchymatous
mantle type
  gelatinous matrix between the hyphae (type C)
matrix kind
  gelatinous
hyphal system kind
  forked
and    with rather short, obtuse, even finger-like branches
cell diameter
1.5 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
17 µm    Lower value of unspecified range (could be µ-s.d., but not known)
45 µm    Upper value of unspecified range (could be µ+s.d., but not known)
Anatomy of the inner mantle layer
organisation
  plectenchymatous
cell diameter
2.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
4.5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
Anatomy of the mantle in longitudinal section



Anatomy of the mantle in cross-section



Anatomy of the emanating elements in general
Anatomy of cystidia


Anatomy of emanating hyphae


Anatomy of the septa of emanating hyphae
clamps presence
  absent


Anatomy of the cells of emanating hyphae
anatomy emanating elements emanating hyphae cell diameter
2.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
3.5 µm    Upper value of unspecified range (could be µ+s.d., but not known)


Anatomy of rhizomorphs
type
  slightly differentiated; central hyphae somewhat enlarged
(type C)

Anatomy of hyphae in rhizomorphs
ampullate, trumpet-like inflated presence
  absent
Anatomy of vessel-like or thickened hyphae in rhizomorphs
anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of central non-vessel-like hyphae in rhizomorphs
anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of peripheral hyphae in rhizomorphs
anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of solitary thick-walled hyphae in rhizomorphs
anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent

Chemical reactions

reaction with KOH 10% presence
  absent
reaction with sulpho-vanillin presence
  present

Ecology

geographic occurrence continent
  North America
knowledge about association with foreign fruitbodies presence
  unknown

Tree

plant family
  Pinaceae
plant genus
  Abies
plant habitat kind
  forests, woods

Fungus

family
  Russulaceae
fruitbodies growth habit
  epigeous
or    pileate-lamellate

Remarks

public notes
  Mycorrhizal ends with hyaline to olivaceous mantle; rhizomorphs olivaceous; mantle covered with a thin layer of mucilaginous material; inner mantle layers with obtusely branched hyphae; laticifers obtusely branched; in sulfo-vanillin laticifers react weakly positive, in KOH contents appearing granular.

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