Myroxylon species

Melilotus officinalis (sweet clover) Myroxylon species (balsam of Peru) Pithecollobium jiringa (jering fruit) Sophora falvescens (Ku shen) Trifolium pratense (red clover) Gentiana species (gentian)... 

Myristica fragrans (nutmeg) Myroxylon species (balsam of Peru)... 

Balsam of Peru is derived from species of Myroxylon such as Myroxylon balsamum and Myroxylon pereirae and has been used in medicinal and cosmetic ointments for centuries. It contains about 25 different substances, including triterpenoids, and can cause allergic reactions. Its sensitizing constituents have been determined (63). 

Peru balsam, Peru oil. P. balsam is a dark red, viscous but still fluid mass. It is an oil-containing resin secreted when the bark of the indigenous Central American tree species Myroxylon pereirae (Fabaceae) is injured. P. oil is a yellow to light brown, somewhat viscous oil from which the contained cinnamic acid partially crystallizes and has an adhering, sweet, bal-samy odor and a warm bitter taste. 

Balsams are physiological or pathological substances secreted by some plant species. They contain essential oils and resins and esters of organic acids (mainly benzoic and cinnamic acids). The well-known Peruvian balsam flows from injured trees of the genus Myroxylon (Fabaceae), such as M. balsamum var. genuinum and M. b. var. pereirae, which are native to Central and South America. 

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