Composition and antimicrobial activity of the essential oils from the Phebalium squamulosum species complex (Rutaceae) in New South Wales, Australia

- Most subsp. of Phebalium squamulosum produce unique essential oils, qualifying as new chemotypes.
- Chemotype variation complements work presently aimed at species revision using morphology.
- For example; phytochemical evidence suggests subsp. verrucosum is taxonomically misplaced.
- For example; phytochemical evidence suggests subsp. squamulosum is a taxonomic mess.
- Some essential oils produced high antimicrobial activity against pathogenic bacteria.