Contraction. - Thu.

Thuja Occidentals. Nat. ord., Conifers.

Synonyms. - Arbor Vita3, Cedrus Lycea.

Fig. - Flora Horn., pl. 73.

American Arbor Vitas. For. names: German, Lebens-baum; French, Thuja du Canada.

Habitat. - Canada and United States. Extensively cultivated as an evergreen.

Flowering time. - May and June.

Parts employed. - The young shoots.

Characters. - Young shoots compressed, vertical, covered with closely imbricated leaves, which are small, obtuse, with a point, smooth; those of the 2 opposite rows compressed and keeled; the intermediate ones flat, with a glandular point or cell of resin at the back. When rubbed between the hands it gives off a peculiar aromatic resinous odour.

Time for collecting. - At the commencement of flowering.

Preparation. - Tincture, corresponding in alcoholic strength with 20 O.P. spirit.

Reference to Horn. Proving. - R. A. M. L., v. (Est. Zeitsch. f. Hom., iv.

Proper forms for dispensing. - φ and upwards, Tincture, Pilules, or Globules.

Average loss of moisture, 58 per cent.