The Loganiaceae of Africa V. Usteria Willd.

The name Usteria was used by various authors for entirely different plants. Unfortunately two of these authors, Willdenow and Medikus, published this name on about the same date in 1790. Willdenow’s Usteria was published within the period January to May and Medikus’s within March to May. As it was impossible to find more exact data on this subject and as Usteria was in use for a long time for the Loganiaceous genus, Stafleu and the present author (1961) preferred to maintain the latter.