This name is a synonym of Darwiniothamnus lancifolius (Hook.f.) Harling.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 6E608697-ED89-4E0F-BF94-49404D744465) with original publication details: Trans. Linn. Soc. London 20 208 1847.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:93879-2.
This name was in version 1 of The Plant List, record gcc-39468.