Fig. 5. General view of the greenhouses Hamburg, 1929. Fig. 2. Anthesis of A. titanum (Becc.) Becc. ex Arcang. in Hamburg, 1929. Fig. 3. Anthesis of A. titanum (Becc.) Becc. ex Arcang. in Hamburg, 1929. Fig. 1. Anthesis of A. titanum (Becc.) Becc. ex Arcang. in Hamburg, 1929. Fig. 4. Anthesis of A. titanum (Becc.) Becc. ex Arcang. in Hamburg, 1929. Fig. 7. Overview of the Aizoaceae collection. Fig. 9. Infructescence of A. rhizomatosus Hett. Fig. 8. Overview of the Amorphophallus collection. Fig. 6. Gigantic potato, 1929.