Joseph Gaertner
- German botanist
- Best known for his work on seeds, De Fructibus et Seminibus Plantarum (1788-1792) (Fruct. Sem. Pl). A three volume. First published in 1788, the second was published in four parts in 1790, 1791, 1791 and 1792. A third volume was published after Gaertner's death by his son from 1805 to 1807.
- De Fructibus was based on specimens of over a thousand genera, including Australian and Pacific specimens from the collection of Sir Joseph Banks and South African specimens from the collection of Carl Peter Thunberg.