It is the matricaria chamomilla Lin. Sp. Pi. 1256. It is upright,annual, and grows wild in corn fields. In France, and other countries on the continent, its flowers are used indiscriminately with the other species, but they are weaker and more disagreeable. The oil obtained from this species, by distillation, is of a fine blue colour, but the air soon changes it to a yellow.

Chamaemelum flore pleno, called also chamaeme-lum nobile flore multiplici, and double camomile. An-themis nobilis var. β. They are produced by culture, and differ in their flowers from the Roman camomile above described in being double, or having several rows of the white petals, and the thick disk proportionably smaller. Sometimes the disk is filled with the petals.

The single and the double flowered sorts are often used indiscriminately: their leaves differ very little; but as the active parts chiefly reside in the disk or tubular part of the florets, which in the single flowers are largest, the latter are generally preferred.

The single sort affords most oil.

Chamaemelum foetidum, called also cynanthemis, cotula faetida, anthemis cotula Lin. Sp. Pi. 1261. Stinking camomile, maiths, and May-weed. It is annual, growing in waste grounds and amongst corn. It is more upright than the other species; its leaves are finer, and flowers closer.

In its qualities it differs greatly from the three preceding. Its smell is disagreeable; its flowers are almost insipid, but the leaves have a strong, acrid, harsh taste. It has been esteemed strongly sudorific. Dr. Brown Langrish gives an account of a decoction of this plant, recommended by a gypsey, throwing a person affected with a rheumatism into a profuse sweat, and curing him of the disease.

Chamaemelum Canariense. The leucanthemum Canariense. Chrysanthemum frutescens Lin. Sp.pl. 1251.

Chamaemelum chrysanthemum. See Buphthalmum Germanicum.