This name is a synonym of Erica parviflora var. exigua (Salisb.) Bolus.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Erica 39 1785.
This name was in version 1 of The Plant List, record kew-2794216, and has not been changed.