The structures of eleven alkaloids isolated from Darlingia darlingiana (F. Muell.) L. A. S. Johnson, a Queensland proteaceous tree, have been determined. They comprise a tropene, two pyranotropanes, and eight pyrrolidine alkaloids.

Darlingia ferruginea J. F. Bailey contains the new tropane alkaloids ferrugine (2) and 3α-benzoyloxy-2α-hydroxybenzyltropane (4) as well as darlingine (1) and ferruginine (3), which also occur in D. darlingiana.

The Tasmanian endemic proteaceous plant Agastachys odorata contains the known alkaloid (-)-6β-acetoxy-3α-tigloyloxytropane, and 3α-(p-hydroxybenzoyloxy)trop-6-ene, the first naturally occurring tropene base.

Fourteen alkaloids have been isolated from Bellendena montana, a monotypic proteaceous plant endemic in Tasmania. The structures of ten of these, bellendine (1), isobellendine (2), darlingine (3),5,11-dihydroisobellendine (5), 2,3-dihydrobellendine (6), 2,3-epidihydrobellendine (7), 2,3-dihydrodarlingine(8), 3α-acetoxy-6β-isobutoxytropane (9), 6β-acetoxy-3α-isobutoxytropane (10) and 3α-acetoxy-6β-hydroxytropane (11), have been established.

The major alkaloids of Anthocercis tasmanica are shown to be hyoscine and nicotine.