structural:reformatting
His favourite plant family: Etudes sur la famille des Podostemacees

Warming held a special interest in the family Podostemaceae, with which he had become acquainted during his stay in Brazil. The plant species of this family are extremely modified by the harsh environment in which they live - they are angiosperms that resemble liverworts.

Part I-V. All published in Kongelige Danske Videnskabernes Selskabs Skrifter - Naturvidenskabelig og Mathematisk Afdeling, 6. Rk.