Blue "Trailing Lobelia Sapphire" flowers (or Edging Lobelia, Garden Lobelia) in St. Gallen, Switzerland. Its Latin name is Lobelia Erinus 'Sapphire', native to South Africa, Malawi and Namibia. Shutterstock Image - Blue "Trailing Lobelia Sapphire" flowers (or Edging Lobelia, Garden Lobelia) in St. Gallen, Switzerland. Its Latin name is Lobelia Erinus 'Sapphire', native to South Africa, Malawi and Namibia. - ID: 1114049315