(Chamomile.)

Origin. - The dried flower-heads of Anthemis nobilis L., a low perennial plant indigenous in Southern and Western Europe.

Description and Properties. - Heads subglobular, about 3/4 inch (2 Cm.) broad, consisting of an imbricated involucre and numerous white, strap-shaped, three-toothed florets, and a few, if any, yellow tubular disk-florets, inserted upon a chaffy, conical, solid receptacle; of a strong, agreeable odor and an aromatic, bitter taste.

Anthemis contains a bitter principle, a pale-blue or yellowisb-brown volatile oil, and a trace of tannin, together with other unimportant constituents.

Dose. - 15-60 grains (1.0-4.0 Gm.) [30 grains (2 Gm.), U. S. P.], in infusion or fluidextract.