Shehbazia (Shehbazieae, Cruciferae), a new monotypic genus and tribe of hybrid origin from Tibet
Generic placement of the Tibetan Dontostemon tibeticus known before 2000 as Nasturtium tibeticum is discussed in the light of available molecular and morphological data. The species is recognized as a representative of the newly described genus Shehbazia. In view of the purported intertribal ( Chorisporeae × Dontostemoneae ) hybrid origin of the genus, the tribe Shehbazieae is established in order to accommodate Shehbazia correctly into the currently accepted system of Cruciferae. Morphological and molecular evidences of the hybrid origin of the taxon are briefly discussed.