Some links - (49,200 on Google, most of them pretty unuseful)

Buscopan, the world's leading producer of Duboisia, delivering 90% of the global requirement of the ingredient.

Good description (no pics)

Henrietta's herbals

A section from the book 'A Practical Treatise On Materia Medica And Therapeutics' ;  by Roberts Bartholow. 

And from the International Academy of CLASSICAL HOMEOPATHY

And from the Tax dept - Is the Duboisia hopwoodii plant a 'tobacco plant' for the purposes of section 28 of the Excise Act 1901 ? Hmmm...

And from the Australian Bushfood and Native Medicine Forum