Two new species of Heliotropium L. (Boraginaceae) from Saudi Arabia

Abstract Two new species of Heliotropium L. (Boraginaceae, subfam. Heliotropioideae), growing in sandy loam soils in Jizan, south-west Saudi Arabia, Heliotropium chaudharyanum Al-Turki, Omer & A. Ghafoor and Heliotropium jizanense Al-Turki, Omer & A. Ghafoor, are described and illustrated. The relationships of the new species within the small-flowered Heliotropium europaeum L. species group are discussed. Notes on distribution and habitat are provided, together with a map.