Russula subnigricans
Species of fungus
From Wikipedia, the free encyclopedia
Russula subnigricans, known as the rank russula,[2] or Nise-Kurohatsu (Japanese), meaning "false blackening russula" is a basidiomycete mushroom of the genus Russula found in East Asia. It is poisonous.
| Russula subnigricans | |
|---|---|
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Russulales |
| Family: | Russulaceae |
| Genus: | Russula |
| Species: | R. subnigricans |
| Binomial name | |
| Russula subnigricans | |
| Russula subnigricans | |
|---|---|
| Mycological characteristics | |
 | Gills on hymenium |
 | Cap is convex |
 | Hymenium is free |
 | Stipe is bare |
 | Spore print is white |
 | Ecology is mycorrhizal |
 | Edibility is poisonous or deadly |
Taxonomy
The species was named by Japanese mycologist Tsuguo Hongo in 1955.[1]
The name was formerly applied to the North American fungus Russula eccentrica in California.[3] It has been reclassified as Russula cantharellicola, where it grows in association with Quercus agrifolia (coast live oak) trees in California oak woodland habitats.[4]
Description
The flesh turns pale red when cut, but does not turn black, unlike Russula nigricans.[1]
Toxicity
Russula subnigricans is a poisonous mushroom,[2] and has been responsible for mushroom poisoning in Taiwan and Japan. The effect is a serious one, rhabdomyolysis.
The toxins responsible are the very unusual cycloprop-2-ene carboxylic acid (a toxic molecule consisting of only 10 atoms) and Russuphelin A (a heavily chlorinated polyphenolic).[5][6]
