<unk>  is a pseudo-taxonomic term for a large group of generally non-pathogenic, commensal streptococcal bacteria that are either α-hemolytic and produce a green (hence the name<unk>  coloration on blood agar plates, or non-hemolytic.
Streptococcus viridans
Streptococcus anginosus
Staphylococcus saprophyticus
Streptococcus pyogenes
Staphylococcus haemolyticus
Clostridium sordellii
Pseudomonas aeruginosa
Corynebacterium haemolyticum