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:Romagnesi 
 Synonyms and close species:S: R. basifurcata, R. grisea v. basifurcata (?) 
 Information given by author(s):Heterophyllae griseinae
Type : 50-89
 
 Host(s):Deciduous (Fagus) 
 Taxon name_Mycobank:
 
 Bibliography:
 

Macro-characters

 
Stipe
 Width of stipe:10 
 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 no
brown variable
white yes
yellow/cream no
blue no
 
orange no
red/pink no
purple/vinaceous no
green no
   
 
 Length of stipe:30 - 40 
 
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: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:35 - 50 
 
Lamellae
 Spacing of lamellae:Close 
 Furcation of lamellae:At or close to the stipe only 
 Color of ridges of lamellae:Fully concolorous with faces 
 Attachment of lamellae:Free to adnate/subfree/both 
 Type of lamellar ridges:Entire/smooth 
 
Main color(s) of lamellae::
grey/black no
brown no
white yes
yellow/cream yes
blue no
 
orange no
red/pink no
purple/vinaceous no
green no
   
 
 Height of lamellae:4 - 6 
 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:Stipe only 
 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:Not turning grey 
 
Chemical reactions
 FeSO4 test on flesh:Pink/pink-orange/brown-grey 
 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:5.2 - 6.5 (7) 
 Width of spores:4.7 - 5.5 (5.7) 
 Amyloid plage:Variable/partial/weak 
 Ornamentations in surface view:Round basis/irregular/linear 
 Connection(s) between verrucae:Crest like/catenulate 
 Overall appearance of spores:Not reticulate 
 Height of verrucae:0 <= x <= 0.5 µm 
 Color of spore deposit:6 
 Pictures from Romagnesi, 1967_Link:
  • 3\198a5.jpg
  • 3\198a6.jpg
 
 
Basidia
 Length of basidia:45 - 50 
 Width of basidia:7 - 8.5 
 Number of sterigmata per basidium:Four 
 
Pleurocystidia
 Length of pleurocystidia:57 - 85 
 Width of pleurocystidia:7.7 - 11.5 
 Thickness of wall of pleurocystidia:Thin (all structures < 2 µm) 
 Sulfo-vanillin test on pleurocystidia:Blue/black/red/pur./or./brown 
 
Pleurocystidia abundance::
absent no
very dispersed 0-350/mm² no
dispersed 350-700/mm² no
 
rather abund 700-1500/mm² variable
abundant 1500-3000/mm² yes
very abundant >3000/mm² variable
 
 
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
 Width of pileocystidia:5.7 - 8 
 Shape of apices of pileocystidia:Variable 
 
Hyphae of pileus
 Diameter of ends of pileipellis hyphae:3.5 - 7 (9) 
 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