hygrophorus russula: an edible fungus with a reddish cap and close pale gills and dry stalk; found under hardwoods
organism: a living thing that has (or can develop) the ability to act or function independently
factor analysis: any of several methods for reducing correlational data to a smaller number of dimensions or factors; beginning with a correlation matrix a small number of components or factors are extracted that are regarded as the basic variables that account for the interrelations observed in the data