Hebe x lewisii - Lewis's Hebe
Lewis’s Hebe has been found growing as an established garden escape on St. Mary's (SV91A, 1992, C.I.Pogson) and on Tresco, Isles of Scilly, (SV81X, 1992, A.Underhill).
French, C.N., Murphy, R.J. & Atkinson, M. 1999. Flora of Cornwall. Wheal Seton Press, Camborne.