Von Ludwig CFH. List of exotic trees, shrubs, plants, bulbs; garden flower, forest, and other seeds: imported lately from Germany (Wurtemberg and Hamburg), Holland, &c. by the Danish Ship Norden, Capt. Burd, and the Ionia, Capt. C. Buck. S. Afr. Q. J. 1831;1(5):40-45. doi:10.21504/saqj.15.2598