Search on : Russula species

 


    

General information

 Substratum:Terricolous 
 
Continent::
Africa no
North America yes
S. and C. America no
 
Asia no
Australia no
Europe yes
 
 Authority:Schaeffer ex Secretan 
 Synonyms and close species:C: R. cyanoxantha f. peltereaui f. variata 
 Information given by author(s):Heterophyllae indolentinae
Type: 53-87
 
 Host(s):Deciduous, Coniferous 
 Taxon name_Mycobank:
 
 Bibliography:
 

Macro-characters

 
Stipe
 Width of stipe:15 - 30 (55) 
 Veil:Absent 
 Form of base of stipe:Not radicate 
 Form of stipe:Straight/centrally inflated 
 Context of stipe:Solid, spongy 
 
Main color(s) of stipe::
grey/black yes
brown variable
white yes
yellow/cream no
blue no
 
orange no
red/pink no
purple/vinaceous variable
green no
   
 
 Length of stipe:40 - 100 
 
Pileus
 Type of pileipellis:Smooth to cracked or both 
 Striations of pileus:Absent to weak or both 
 Viscosity of pileus:Never viscid nor viscous 
 Form of center of pileus:Concave to plane or both 
 Separability of pileus:Nil to medium or both 
 
Thickness of flesh of pileus
 Thickness of flesh of pileus:Thick 
 
Main color(s) of pileus::
grey/black yes
brown yes
white no
yellow/cream no
blue no
 
orange no
red/pink no
purple/vinaceous yes
green no
   
 
 Diameter of pileus:45 - 150 
 
Lamellae
 Spacing of lamellae:Close 
 Number of lamellulae:Variable or equal number 
 Furcation of lamellae:At the stipe/everywhere/absent 
 Color of ridges of lamellae:Variable in color 
 Attachment of lamellae:Adnate to decurrent/subdecur. 
 Type of lamellae:Elastic 
 Type of lamellar ridges:Entire/smooth 
 
Main color(s) of lamellae::
grey/black no
brown variable
white yes
yellow/cream variable
blue no
 
orange no
red/pink no
purple/vinaceous variable
green no
   
 
 Height of lamellae:5 - 10 
 Odor:None 
 Flavor of flesh:Sweet to bitter or both 
 
Color changes
 Fruit body turns green/blue with age:Not turning green/blue 
 Fruit body turns red if touched/cut:Not turning red 
 Fruit body turns yellow-brown with age:Entire fruit body 
 Fruit body turns br. yellow if touched:Not turning bright yellow 
 Fruit body turns black with age/touched:Not blackening 
 Fruit body turns grey with age:Entire fruit body 
 
Chemical reactions
 FeSO4 test on flesh:No react. to green-grey/weak 
 Ga´ac test on flesh:Blue/green 
 
Latex
 Latex:Absent 
 
Color(s) of fresh latex::
grey/black no
brown no
white no
yellow/cream no
blue no
 
orange no
red/pink no
purple/vinaceous no
green no
   
 
 
Color(s) of dry latex::
grey/black no
brown no
white no
yellow/cream no
blue no
 
orange no
red/pink no
purple/vinaceous no
green no
   
 

Micro-characters

 
Spores
 Length of spores:(6.5) 7 - 9.2 (10) 
 Width of spores:(5.2) 6 - 6.5 
 Amyloid plage:Variable/partial/weak 
 Appearance of spores verrucae:Tips round./truncat./cylindr. 
 Ornamentations in surface view:Irregular 
 Connection(s) between verrucae:No ornament./smooth or so 
 Overall appearance of spores:Not reticulate 
 Height of verrucae:Variable from 0 to 2 µm 
 Color of spore deposit:1 
 Pictures from Romagnesi, 1967_Link:
  • 3\168a1.jpg
  • 3\168a2.jpg
 
 
Basidia
 Length of basidia:38 - 56 
 Width of basidia:9 - 11.5 
 Number of sterigmata per basidium:Four 
 
Pleurocystidia
 Length of pleurocystidia:57 - 100 (130) 
 Width of pleurocystidia:5 - 9 
 Length of pleurocystidial emergence:0 
 Thickness of wall of pleurocystidia:Thin (all structures < 2 µm) 
 Shape of apices of pleurocystidia:Mainly capit./append./acerate 
 Sulfo-vanillin test on pleurocystidia:Blue/black/red/pur./or./brown 
 
Pleurocystidia abundance::
absent no
very dispersed 0-350/mm² ?
dispersed 350-700/mm² ?
 
rather abund 700-1500/mm² ?
abundant 1500-3000/mm² ?
very abundant >3000/mm² ?
 
 
Marginal cells
 Length of marginal cells:0 
 Width of marginal cells:0 
 
Subhymenium
 Subhymenium:Pseudoparenchymatous 
 Differentiation of supra and subpellis:Variable/doubtful 
 Size of cells in supra and subpellis:Same in size 
 
Pileocystidia
 Width of pileocystidia:2 - 4 
 Location of pileocystidia:Suprapellis 
 Shape of apices of pileocystidia:Mainly capit./append./acerate 
 Sulfo-vanillin test on pileocystidia:Variable/weak reaction 
 
Hyphae of pileus
 Diameter of subpellis hyphae:2.5 - 5 
 Diameter of primordial hyphae:0 
 Vacuolar pigments of hyphae of pileus:Present 
 Membrane pigments of hyphae of pileus:Absent 
 Wall of hyphae of pileus:Thin (<1 µm) 
 Filamentous hyphae of pileus:Absent 
 
Caulocystidia
 Width of caulocystidia:6 - 6.5 

DNA

 rDNA sequences: