This name is a synonym of Adiantum deltoideum var. jamaicense (Fée) Jenman.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26622562) with original publication details: Mém. Foug. 11: 19, t. 33, f. 3 1866.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17010900-1.
This name was in version 1 of The Plant List, record tro-26622562.