Search on : Russula species

 


    

General information

 Substratum:Terricolous 
 
Continent::
Africa no
North America no
S. and C. America no
 
Asia no
Australia no
Europe yes
 
 Authority:Grove 
 Synonyms and close species:C: R. ochroleuca 
 Information given by author(s):Polychromae integroidinae
Not common
Type : 57-103
 
 Host(s):Deciduous (Betula, Alnus, Populus tremula) 
 Taxon name_Mycobank:
 
 Bibliography:
 

Macro-characters

 
Stipe
 Width of stipe:10 - 20 (22) 
 Veil:Absent 
 Form of base of stipe:Not radicate 
 Form of stipe:Inflated at top to straight 
 Context of stipe:Solid, spongy 
 
Main color(s) of stipe::
grey/black yes
brown no
white no
yellow/cream yes
blue no
 
orange no
red/pink no
purple/vinaceous no
green no
   
 
 Length of stipe:(30) 40 - 85 
 
Pileus
 Type of pileipellis:Smooth to squamose 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:Medium (from25% to 75%) 
 
Thickness of flesh of pileus
 Thickness of flesh of pileus:Thick 
 
Main color(s) of pileus::
grey/black no
brown variable
white no
yellow/cream yes
blue no
 
orange no
red/pink no
purple/vinaceous no
green no
   
 
 Diameter of pileus:(30) 40 - 100 (120) 
 
Lamellae
 Spacing of lamellae:Close 
 Furcation of lamellae:At or close to the stipe only 
 Color of ridges of lamellae:Variable in color 
 Attachment of lamellae:Free to adnate/subfree/both 
 Type of lamellar ridges:Entire/smooth 
 
Main color(s) of lamellae::
grey/black variable
brown variable
white no
yellow/cream yes
blue no
 
orange no
red/pink no
purple/vinaceous no
green no
   
 
 Height of lamellae:7 - 9 
 Odor:Variable/weak and pleasant 
 Flavor of flesh:No taste, sweet 
 
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:Not turning yellow-brown 
 Fruit body turns br. yellow if touched:Not turning bright yellow 
 Fruit body turns black with age/touched:Entire fruit body 
 Fruit body turns grey with age:Entire fruit body 
 
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:8.7 - 10 
 Width of spores:7.5 - 7.7 
 Amyloid plage:Present 
 Appearance of spores verrucae:Tips acute/sharp/pointed (/) 
 Ornamentations in surface view:Round bases 
 Connection(s) between verrucae:Joined by fine and low lines 
 Overall appearance of spores:Partly to complet. retic./both 
 Height of verrucae:0.5 < x < 2 µm 
 Color of spore deposit:11 
 Pictures from Romagnesi, 1967_Link:
  • 3\344a.jpg
 
 
Basidia
 Length of basidia:37 - 48 
 Width of basidia:10 - 11.5 
 Number of sterigmata per basidium:Four 
 
Pleurocystidia
 Length of pleurocystidia:50 - 80 
 Length of pleurocystidial emergence:0 
 Thickness of wall of pleurocystidia:Thin (all structures < 2 µm) 
 Shape of apices of pleurocystidia:Variable 
 Sulfo-vanillin test on pleurocystidia:Variable/weak reaction 
 
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
 Differentiation of supra and subpellis:Obvious 
 Size of cells in supra and subpellis:Same in size 
 
Pileocystidia
 Location of pileocystidia:Pileocystidia absent 
 Septation of pileocystidia:Pileocystidia absent 
 Shape of apices of pileocystidia:Pileocystidia absent 
 Sulfo-vanillin test on pileocystidia:Pileocystidia absent 
 Cresyl blue test on pileocystidia:Pileocystidia absent 
 
Hyphae of pileus
 Diameter of primordial hyphae:4.5 - 6.5 (8.5) 
 Vacuolar pigments of hyphae of pileus:Present 
 Membrane pigments of hyphae of pileus:Variable/weak 
 Wall of hyphae of pileus:Thin (<1 µm) 
 Filamentous hyphae of pileus:Absent 
 
Caulocystidia
 Thickness of wall of cheilocystidia:Thin (all structures < 2 µm)