(From mille, a thousand, and folium, a leaf). Lentibularia; supercilium and Iumbus Veneris, myriophyllon, chiliophyllon, common yarrow; mill foil, Achillea millefolium Lin. Sp. Pl. 1267, is a plant with rough stiff leaves, divided into small segments, set in pairs, along a middle rib, like feathers; the little flowers stand thick together in the form of an umbel on the top of the stiff stalk, and consist eaeh of several whitish orpurpleish petala, set round a loose disk of the same colour, followed by small crooked seeds.

It is perennial, grows plentifully on sandy commons, and flowers almost all the summer.

The leaves and flowers, are considered to be mild corroborants, and antispasmodics; their sensible qualities promise some activity, for they have a weak but agreeable aromatic smell, a slightly bitter, rough, and pungent taste: the leaves are most bitter, the flowers have most smell, and the young roots a glowing warm taste like that of contrayerva, but the smell is greatly diminished by drying, By the Greek physicians this plant was esteemed a vulnerary and styptic, generally loyed internally as an astringent in all haemorrhages. Stahl and Hoffman used it in bleeding from the s and nose, too copious flow of the menses, and bleeding piles. Stahl considered it not only as an astringent, but a powerful tonic, antispasmodic, and sedative; it is now neglected, and the leaves and flowers only are appropriated to medical purposes, if it should be employed.

Both water and spirit extract the virtue of the leaves and flowers; but water the astringency, and spirit the aroma, in the greatest degree. If the flowers are distilled with water they yield an essential oil; and if the plant is gathered from a rich soil, the oil will appear of a blue colour; if otherwise it will be green. A strong decoction of the root and leaves is said to have cured a dysentery. See Raii Historia; Lewis's Materia Medica.

M Illefolium aquaticum. See Myriophyllon.