1) Fungus genus 2) Genus armillaria 
Honey fungus, or Armillaria or оpenky (опеньки), is a genus of parasitic fungi that live on trees and woody shrubs. It includes about 10 species formerly lumped together as A. mellea. Armillarias are long lived and form some of the largest living organisms in the world. The largest single organism (of the species Armillaria solidipes) cove...
genus of about 35 species of fungi in the order Agaricales (q.v.; class Agaricomycetes, kingdom Fungi), found throughout northern North America and ...
A soil fungus, hArbored by oak roots which is particularly devastating to grape vines. If a grower plants new vineyard in a field which had previously held oak trees, he must fumigate the soil prior to planting, lest the residual Armillaria (Oakroot Fungus) kill his new vines within a year or two!
[n] - genus of edible mushrooms having white spores an annulus and blue juice
genus Armillaria noun genus of edible mushrooms having white spores an annulus and blue juice; some are edible; some cause root rot