Echium stenosiphon is a species of flowers that belong to the Boraginaceae family. The species are endemic in Cape Verde. Its last form of the scientific name means the narrow siphon. Together with Echium vulcanorum and Echium hypertropicum, its local name is lingua de vaca (cowtongue or cow-tongue) because of the texture of the leaves. The plant are used for medicinal and dietary purposes for a cough syrup.