Eucalyptus oil differences

Eucalyptus Blue Mallee The Blue Mallee specie has the highest antiseptic cineol content and therefore is one of the strongest antiseptics among the Eucalyptus. It can also be used to combat the effects of colds and flu. Has a fresh, camphorous aroma with a hint of peppermint.
Eucalyptus Globulus Eucalyptus Globulus is fantastic on skin ailments (Burns, blisters, wounds, insect bites, lice, and skin infections), as well as to combat the effects of colds and the flu. There is also a history of Eucalyptus essential oil being applied to sore muscles and joints.
Eucalyptus Peppermint Eucalyptus Peppermint, commonly known as “broad-leaved Peppermint”, is reputed to have excellent properties as an anti viral, antiseptic, expectorant and as a cleansing and cooling agent. With a peppermint-like aroma, it is considered refreshing and up-lifting. The leaves are rich in piperitone but low in eucalyptol, which can be a skin irritant for some.
Eucalyptus Radiata Eucalyptus Radiata is commonly known as “narrow-leaved Peppermint” and contains a high percentage of cineol, also known as eucalyptol, popularly used to relieve colds and congestion. Eucalyptus Radiata is preferred over Eucalyptus Globulus because it is less harsh, more pleasant to inhale and less likely to irritate the skin. It can also be used on sore muscles and joints and also as an antiseptic. It has a crisp, clean, camphorous aroma with back notes of citrus/floral.
Eucalyptus Staigeriana Eucalyptus Staigeriana, also known as Lemon Iron Bark or Lemon-Scented Ironbark, has a lemon-scented aroma and can be used as anti viral, antiseptic, expectorant, anti inflammatory and a digestive stimulant. It is not cineol-rich, so can be used by people with sensitive skin.

Disclaimer:
Please note, the International Federation of Aromatherapists do not recommend that Essential Oils be taken internally unless under the supervision of a Medical Doctor who is also qualified in clinical Aromatherapy.