Morphology Description (Habit)
The saffron plant is a small bulbous perennial, cultivated for its large, scented, blue or lavender flowers. The flowers have a trifid, orange-coloured stigma which along with the style-tops yield the saffron of commerce.

Principal Constituents
The glycosides, crocin and picrocrocin together with lycopene, ß-carotene, g-carotene, zeaxanthin and a crystalline hydrocarbon¹. The essential oil of saffron deposits, on standing, stearoptene, probably a tertiary alcohol².

Pharmacology
The stigma showed remarkable inhibitory effects on blood coagulation; it prolonged both PT and PTT and inhibited platelet aggregation induced by ADP and collagen. It accelerated in vitro fibrinolysis activity of urokinase and plasmin. A platelet aggregation inhibitor containing adenosine has been isolated from the stigma. The IC50 values of adenosine against platelet aggregation induced by ADP and collagen are 7.5 and 0.82 µg/ml, respectively³.

In mice, an extract of C.sativus stigmas partially prevented the decrease in body weight, hemoglobin levels and leucocyte counts caused by 2mg/kg of cisplatin i.p. for 5 days. Treatment with C.sativus extract also significantly prolonged the life span of cisplatin-treated mice almost three fold⁴.

Oral administration of 100mg/kg of the saffron extract significantly inhibited the growth of Dalton's lymphoma ascites (DLA) and S-180 solid tumor by 87 and 41 percent respectively, in mice. A dose of 150mg/kg delayed the onset of tumor formation and inhibited further growth of Dalton's lymphoma ascites and solid tumor by 80 percent. Chromium release cytotoxicity assay reflected the sensitivity of DLA and S-180 tumor cells to cytolysis (in vitro) in the presence of the extract. Estimation of serum vitamin A and beta-carotene levels from S-180 tumor bearing mice treated with saffron extract indicated elevated serum levels of serum vitamin A and beta-carotene. Chemical analysis of the antitumor compound from saffron extract indicated that crocin (a natural carotenoid) was responsible for the observed biological effects. Crocin probably induces the therapeutic antitumor effect by its provitamin A activity and/or its antioxidant activity or by modulating the functional levels of other antioxidants⁵.

Toxicology
Saffron bulbs are toxic to young animals, and the stigmas in overdoses are narcotic⁶.

Indications
Saffron is credited with various medicinal properties. It is used as a nerve sedative and emmenagogue. It is used in fevers, melancholia and enlargement of the liver. It also has stimulant and stomachic properties and is considered to be a remedy for catarrhal affections of children.

1. Mayer & Cook, 71; Wallis, loc.cit.
2. Mayer & Cook, 71; Wallis. loc. cit; U.S.D., loc. cit., Winton & Winton, IV, 278.
3. Nishio et al, Shoyakugaku Zasshi, 1987, 41, 271; Chem Abstr, 1993, 119, 131174.
4. Nair, S.C. et. al., J. Ethnopharmacol., 1991, v.,31, 75-83.
5. Nair, S.C. et. al., Int. J. Pharmacog., 1994, v., 32(2), 105-114.
6. Chopra & Badhwar, Indian J. agri. Sci.,1940, 10, 40.