The tree of this bitter orange species can grow 18-30 feet high. Its leaves are pointed, oval, and evergreen, and it has creamy white, fragrant flowers. This orange has coarser and darker skin than the sweet orange, and a more bitter pulp.

Orange fruit contains synephrine, which acts similarly to other neurotransmitters in that it relaxes the muscles. Orange juice helps the body eliminate waste products, and the high vitamin C content helps the body fight infections.

Reddish, erect, branched stems up to 2-3 feet high. Peppermint's leaves are hairy, sharply serrated, and are green to reddish-green. Whorled clusters of reddish flowers form loose spikes at leaf axils.

Peppermint is used for colds, flu, and fevers, and contains antioxidants to help the heart and circulatory system. Containing menthol, an anesthetic, peppermint is effective for soothing sore throats.

Small, very attractive tree from 10-20 feet with grayish bark and stout spines where the leaf stalks join the branches. In the leaf, axils grow clusters of five-petaled flowers that are white inside and pink- or purple-tinged outside. They are followed by the well-known sour, yellow fruit.

The fruit is an excellent source of vitamin C and has cooling properties. Today, hot lemon juice and honey is still a favorite home remedy for colds and its astringency is useful for sore throats. Lemons are an excellent preventative medicine and have a wide range of uses in the domestic medicine chest. The bioflavonoids in the fruit help to strengthen the inner lining of blood vessels, especially veins and capillaries, and help counter varicose veins and easy bruising.