Search on : Russula species

 


    

General information

 Substratum:Terricolous 
 
Continent::
Africa no
North America yes
S. and C. America no
 
Asia no
Australia no
Europe no
 
 Authority:Craw. 
 Information given by author(s):Russula (?) melliolentinae
Type : not seen
 
 Host(s):Deciduous 
 Taxon name_Mycobank:
 
 Bibliography:
 

Macro-characters

 
Stipe
 Width of stipe:13 - 15 
 Veil:Absent 
 Form of base of stipe:Not radicate 
 Form of stipe:Infl. at top/base/straight 
 Context of stipe:Solid, spongy 
 
Main color(s) of stipe::
grey/black yes
brown yes
white yes
yellow/cream yes
blue no
 
orange no
red/pink no
purple/vinaceous no
green no
   
 
 Length of stipe:35 - 55 
 
Pileus
 Type of pileipellis:Smooth 
 Striations of pileus:Weak (less than mid-radius) 
 Viscosity of pileus:Variable 
 Form of center of pileus:Concave/depressed 
 Separability of pileus:Medium (from25% to 75%) 
 
Thickness of flesh of pileus
 Thickness of flesh of pileus:4 - 5.5 
 
Main color(s) of pileus::
grey/black yes
brown yes
white no
yellow/cream no
blue no
 
orange no
red/pink yes
purple/vinaceous yes
green no
   
 
 Diameter of pileus:65 - 85 
 
Lamellae
 Spacing of lamellae:Variable 
 Number of lamellulae:Less than lamellae 
 Furcation of lamellae:At the stipe/absent 
 Color of ridges of lamellae:Fully concolorous with faces 
 Attachment of lamellae:Free to adnate/subfree/both 
 Type of lamellae:Fragile/breakable 
 Type of lamellar ridges:Entire/smooth 
 
Main color(s) of lamellae::
grey/black no
brown yes
white no
yellow/cream yes
blue no
 
orange no
red/pink no
purple/vinaceous no
green no
   
 
 Height of lamellae:5 - 7 
 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: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:Stipe only 
 
Chemical reactions
 Sulfo-vanillin test on flesh:No color changes 
 FeSO4 test on flesh:Pink/pink-orange/brown-grey 
 Ga´ac test on flesh:Blue/green 
 Phenol test on flesh:Brown/purple/vinaceous 
 Formol test on flesh:Variable/weak reaction 
 
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:6.3 - 8.1 
 Width of spores:5.7 - 6.8 
 Amyloid plage:Variable/partial/weak 
 Appearance of spores verrucae:Tips acute to rounded/both 
 Ornamentations in surface view:Irregular 
 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:5 
 
Basidia
 Length of basidia:31 - 42 
 Width of basidia:7.9 - 10.2 
 Number of sterigmata per basidium:Four 
 
Pleurocystidia
 Length of pleurocystidia:45 - 60 
 Width of pleurocystidia:2.8 - 6.8 
 Length of pleurocystidial emergence:0 - 18 
 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 no
dispersed 350-700/mm² variable
 
rather abund 700-1500/mm² yes
abundant 1500-3000/mm² variable
very abundant >3000/mm² no
 
 
Marginal cells
 Length of marginal cells:0 
 Width of marginal cells:0 
 
Subhymenium
 Thickness of subhymenium:28 - 40 
 Thickness of suprapellis:70 - 80 
 Thickness of subpellis:60 - 70 
 Subhymenium:Pseudoparenchymatous 
 Differentiation of supra and subpellis:Obvious 
 Size of cells in supra and subpellis:Same in size 
 Gelification of subpellis:Weakly to strongly gelified 
 
Pileocystidia
 Width of pileocystidia:4 - 6.8 
 Location of pileocystidia:In supra/subpellis 
 Septation of pileocystidia:Usually septate 
 Sulfo-vanillin test on pileocystidia:Variable/weak reaction 
 
Hyphae of pileus
 Diameter of subpellis hyphae:1 - 3.5 
 Diameter of ends of pileipellis hyphae:1.7 - 3.4 
 Diameter of primordial hyphae:0 
 Membrane pigments of hyphae of pileus:Absent 
 Wall of hyphae of pileus:Thin (<1 µm) 
 Filamentous hyphae of pileus:Variable/sometimes present 
 
Stipitipellis
 Diameter of hyphal ends of stipitipellis:1.2 - 4 
 
Caulocystidia
 Width of caulocystidia:2.8 - 8