Camphor tree (Cinnamomum camphora) is used extensively for the external treatment of muscular strain, gout, rheumatic conditions, inflammations, as well as acting as a weak antiseptic for the skin.

Lemon bee balm (Monarda citriodora) attracts many birds and butterflies as a result of its potent fragrance. Because of its pleasant aroma, lemon bee balm has been used in the production of perfumes and fragrances. The leaves contain a chemical constituent, citronellol, which is an effective insect repellent. Note: Monarda species should not be confused with true bergamot, Citrus bergamia.

Palmarosa (Cymbopogon martinii) contains an essential oil that is extracted through a steam distillation process. The result is a pale yellow oil that can be classified as a middle note for perfumes. The aroma is floral and sweet, somewhat similar to geranium oil.

Almond verbena (Aloysia virgata) with its almond-scented leaves and blossoms is a favorite of gardeners and butterflies alike. The plant produces spikes of delicate white flowers from spring through late summer.

Patchouli (Pogostemon cablin) produces a deep golden-brown oil that is commonly extracted by steam distillation. The oil is considered as a base note when used in perfumes. The aromatherapeutic properties of patchouli include treating acne, chapped skin, repelling insects and eliminating fatigue.