Duboi'sia myoporoi'des. -- Australia. Small tree having properties similar to those of belladonna and hyoscyamus; leaves 7.5-10 Cm. (3-4') long, 12-25 Mm. (1/2-1') broad, petiolate, midrib prominent, entire, taste bitter; contains duboisine .3-1 p.c., a volatile alkaloid (mixture of hyoscyamine, scopolamine, and atropine), which forms numerous salts. Dose of leaves. Gr. 1-3 (.06-.2 Gm.), duboisine hydrobromide or sulphate, gr. 1/120-1/60 (.0005-.001 Gm.); used externally for eye affections, in solution (1 p.c. in water).