Christian Ludwig (Luis) Landbeck (1807–1890) was a prominent German ornithologist.
He took part in an expedition to Chile and described many species of birds in collaboration with Rodolfo Amando Philippi. He directed the publication of the Naturgeschichte aller Vögel Europas (Natural history of all European birds).
Although the two scientists jointly described many species, the cactus Cereus coerulescens var. landbeckii was named by Philippi in honour of his colleague [1].