This name is a synonym of Thymus caespititius Brot..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 460390) with original publication details: Bol. Soc. Brot. 18: 178 1902.
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Thymus caespititius in version 1 of The Plant List.