Ammi: A plant genus of the family ASTERACEAE that is the primary plant source of KHELLIN.Khellin: A vasodilator that also has bronchodilatory action. It has been employed in the treatment of angina pectoris, in the treatment of asthma, and in conjunction with ultraviolet light A, has been tried in the treatment of vitiligo. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1024)Apiaceae: A large plant family in the order Apiales, also known as Umbelliferae. Most are aromatic herbs with alternate, feather-divided leaves that are sheathed at the base. The flowers often form a conspicuous flat-topped umbel. Each small individual flower is usually bisexual, with five sepals, five petals, and an enlarged disk at the base of the style. The fruits are ridged and are composed of two parts that split open at maturity.Prosopis: A plant genus of the family FABACEAE that is a source of prosopis gum.Anethum graveolens: Anethum graveolens L. is a plant species of the family APIACEAE. The leaves are considered as a spice (SPICES).Psoralens: Linear furanocoumarins which are found in many PLANTS, especially UMBELLIFERAE and RUTACEAE, as well as PSORALEA from which they were originally discovered. They can intercalate DNA and, in an UV-initiated reaction of the furan portion, alkylate PYRIMIDINES, resulting in PHOTOSENSITIVITY DISORDERS.Setaria Nematode: A genus of parasitic nematodes found in the peritoneal cavity of wild or domestic cattle or equines.Setariasis: Infection with nematodes of the genus Setaria. This condition is usually seen in cattle and equines and is of little pathogenic significance, although migration of the worm to the eye may lead to blindness.Foeniculum: A plant genus of the family APIACEAE used in SPICES.