Flora and Fauna
- 1782
- Horsetails: Relic Plants from Prehistory
- Photographic study by Dave Walker of these plants, including photomicrographs of the cross section of a cone.
- 1784
- Taxodium mucronatum
- Distribution and occurrence, value and use, characteristics, and fire ecology.
- 1786
- Variegated Horsetil: Equisetum variegatum
- The characteristics of this species, and two photographs.
- 1787
- Ginkgo - the Maidenhair Tree
- A plant watcher's notes from the edge of the Kanto Plain, Japan, with photographs and links.
- 1789
- Ginkgo biloba
- Tree identification fact sheet with photos of the leaf, flower, fruit, twig, bark and form.
- 1791
- Great Horsetail: Equisetum telmateia
- Several photographs of this species which can be up to two metres tall, and its description.
- 1793
- Wood Horsetail: Equisetum sylvaticum
- A description of this tall species with a number of photographs.
- 1794
- Gnetum
- Information of this genus of tropical lianas, with descriptions of six species and some images.
- 1797
- Welwitschia mirabilis
- Description of this dioecious perennial plant of southwest Africa, often described as "unlike any known plant on earth."