This name is a synonym of Handroanthus chrysanthus subsp. pluvicola (A.H.Gentry) S.O.Grose.
The record derives from iPlants
(data supplied on 2012-03-23)
which reports it as a synonym (record 318545) with original publication details: Phytologia 35: 190 1977.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:248650-2.
This name was in version 1 of The Plant List, record kew-318545.