This oil is supposed to be obtained from Genista tridentata (family Leguminosae) a plant that grows wild in Brazil and is used as a popular remedy in a variety of ways2).
Carqueja oil is yellowish and has a somewhat narcotic, camphor-like, not pleasant odor: dl5o0,9962; aD - 31°15' at 17°; S. V. 190,5. When distilled three-fourths of the oil passed over between 200 and 300°, acetic acid being formed. In the first fraction a small amount of cineol was detected. The residue consisted of a thick, tough mass.