Mas, (from Chamaepitys Chamaepitys 2014 and the pine tree.) Arthetica vel arthretica, ajuga, abiga; iva arthritica. Dioscorides says, that it was called holocyron in Pontus, Ionia in Athens, and sideritis in Euboea. Common ground-pine. It is the teucrium chamaepitys Lin. Sp. Pi. 787.

It is a low hairy creeping plant, with square stalks, whitish clammy leaves, cut deeply into three narrow segments, set in pairs at the joints, and yellow labiated flowers without pedicles, and wanting the upper lip. It is annual, grows wild in sandy and chalky grounds in some parts of England; flowers in July and August, and has a long slender fibrous root.

The leaves are moderately bitter, of a resinous but not disagreeable smell, approaching in this respect, as in their external form, to those of the pine tree. They are aperient, stimulant, and corroborant; are commended in palsies, rheumatisms, gout, and uterine obstructions; are attenuating and diuretic, and in general of similar virtues with the chamaedrys,but more active from an admixture of an essential oil similar to turpentine.

They yield their virtue to water, but somewhat more fully to spirit: on distillation with water, a very small portion of essential oil is obtained, resembling that from turpentine. An infusion of the dried herb in white wine is the best preparation, but the dried leaves may be taken to a drachm for a dose. They arc an ingredient in the pulvis ad rheumatismum. See Chamae-drys.

Chamaepitys moschata, also called iva moachata Monspeliensium; chamaepytis anthyllis. Teucrium iva Lin. Sp. Pi. 787. French ground-pine.

It is weaker, but of similar virtues. See Chamae-pitys.