Contractions. - Bruc. Bru.
Nat. ord., Loganiaceae.
Synonym. - Angustura spuria.
There seems to be great obscurity respecting the source of the poisonous false Angustura bark, which was the substance proved and published in Stapf's Archives, xiv.; so that the name is only retained provisionally until the true source of the bark is accurately determined. It is very generally acknowledged to be the bark of Strychnos Nux Vomica.
Characters and Tests. - Flat pieces, or incomplete quills, from 2 to 8 inches long, externally of a dirty greyish-yellow ground, with numerous irregular prominent spots or tubercles of a lighter grey colour. Distinguished from Angustura vera by the transverse fracture becoming bright red when touched with Nitric Acid. The rusty specks become deep bluish-green when touched with the same acid.
Preparation. - Tincture, using proof spirit.
Reference to Horn. Proving. - Stapf's Arch., xiv.
Proper forms for dispensing. - φ and lx, Tincture only. 1 and upwards, Tincture, Pilules, or Globules.