Flora and Fauna
- 4301
- Euphorbias: Spurges
- Information from Botanical.com, a modern herbal, on these poisonous plants, with illustrations of Euphorbia esula and Euphorbia resinifera.
- 4304
- Croton corylifolius
- Description of this bush or small tree, with photographs of leaves, fruits and bark.
- 4305
- Croton eluteria: Cascarilla
- Description and several illustrations of this small tree, with information on its herbal properties, uses in tribal and herbal medicine, the chemicals it contains, its biological activities and clinical research.
- 4306
- Croton lechleri: Sangre de Grado
- Description and several photographs of the Dragon's Blood tree, with information on its herbal properties, uses in tribal and herbal medicine, the chemicals it contains, its biological activities and clinical research.