Ru'ta grave'olens. -- The leaves, U.S.P. 1830-1870; S. Europe, cultivated. Plant .6-1 M. (2-3 degrees) high, woody; flowers yellow; fruit capsule, 4-5-lobed; seed black, many, all parts active; leaflets 12-25 Mm. (1/2-1') long, 6 Mm. (1/4') wide, crenate, thick, pellucid-punctate, aromatic, bitter; contain volatile oil (Oleum Rutae, U.S.P. 1870-1880, greenish-yellow, aromatic), rutin, (rutic or rutinic acid, CHO-- bitter, yellow, crystalline glucoside, identical with barosmin, decomposing into quercetin etc.).  Stimulant, emmenagogue, nervine; hysteria, colic, amenorrhea, menorrhagia, metrorrhagia -- due to atony of uterus; dangerous abortifacient; large doses irritant-poison -- severe gastroenteritis, vomiting, abdominal pain, distention, bloody stools, strangury, convulsions, rarely death.  Dose, gr. 5-20 (.3-1.3 Gm.); oil, mj-5 (.06-.3 cc.).