Caralluma lamellosa (Apocynaceae), a remarkable new species from Somalia

The new species Caralluma lamellosa, from a rocky limestone slope about 200 m a.s.1. in north-eastem Somalia is described and illustrated. The plant is reminiscent of C. furta in habit, but its outer corona, with undivided linear-oblanceolate lobes opposite to the anthers and at first examination looking like lamellae on the corolla tube, is unparalleled among stapeliads.