They also showed us how to make a mini flower press (first picture) using cardboard and index cards. Obviously these would be smaller specimens and the professor suggested putting wax paper between the layers. The rubber bands would be used to secure the "press".
The Australian National Botanic Gardens maintains a scientific collection of native plants from all parts of Australia. The plants are displayed for the enjoyment and education of visitors and are used for research into plant classification and biology. A herbarium of preserved plant specimens is closely associated with the living collection.