This name is a synonym of Nasturtium floridanum (Al-Shehbaz & Rollins) Al-Shehbaz & R.A. Price.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50120343) with original publication details: J. Arnold Arbor. 69(1): 68 1988.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:941009-1.
This name was in version 1 of The Plant List, record tro-50120343.