It is an erect annual herb with broadly-elliptic leaves, yellow or bluish purple flowers and small pods with one seed, which is adhering to the pericarp. Psoralen and isopsoralen are the active principles of the drug. Bavachinin -A a flavanone isolated from the fruits revealed marked anti-inflammatory and mild analgesic properties.

Used in Purim (HemoCare), Erina-EP.