This name is a synonym of Heliconia subulata Ruiz & Pav..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 453834) with original publication details: Ann. Bot. (Oxford) 7: 199 1893.
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Heliconia psittacorum in version 1 of The Plant List.