This name is a synonym of Philonotis fontana f. laxifolia (Mönk. ex Loeske) Mönk..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35107678) with original publication details: Hedwigia 45: 207 1906.
This name was in version 1 of The Plant List, record tro-35107678, and has not been changed.