Matrica'ria Chamomil'la, Matricaria, German Chamomile, N.F. -- The dried flower-head with not more than 5 p.c. of stems or other foreign organic matter, yielding not more than 4 p.c. of acid-insoluble ash; Europe, W. Asia, cultivated in United States. Annual herb .3-.6 M. (1-2 degrees) high, branched, smooth, solid, striate, greenish; leaves 5 Cm. (2') long, bi-, tri-pinnate, green, smooth; leaflets linear, small. Flower-heads, May-Aug., few white ray-florets and numerous yellow disk-florets on conical hollow receptacles, 3-10 Mm. (1/8-2/5') broad; disk-florets tubular, perfect, without pappus; ray-florets 10-20, pistillate, corolla white, 3-toothed, 4-veined, usually reflexed, involucre 20-30 pubescent scales; peduncles greenish, furrowed, twisted; achenes 3-5-ribbed; pappus none; odor pleasant, aromatic; taste aromatic, bitter -- should be preserved in tightly-closed containers. Powder, yellowish-brown -- many spinose pollen grains with 3 pores, fragments of ray-florets, glandular hairs, achene tissue with markings, parenchyma with calcium oxalate rosette aggregates, anthers, stigmas, vascular bundle with tracheae, involucral scales bearing porous fibers, tracheae and elliptical stomata; solvents: boiling water, alcohol; contains volatile oil .25 p.c., anthemic acid, anthemidin, tannin, ash 13 p.c. Stimulant (volatile oil), tonic (anthemic acid), carminative, diaphoretic, nervine, emmenagogue; aid to digestion in convalescence, general debility, intermittents, delirium tremens, flatulent-colic -- externally: local pains, colic, toothache, earache, abscesses, sprains, rheumatism. Dose, gr.15-60 1-4 Gm.); 1. Species Emollientes, 20 p.c. Infusion, 5 p.c.; when cold -- tonic, when warm -- emetic, dose, ad libitum. Oleum Chamomillae Infusum (flowers 10, olive oil 100, digested 2 hours) -- locally. Syrup (flowers 3, water for infusion 10, sucrose 18). Poultice.