This name is a synonym of Eustachys tenera (J.S.Presl) A.Camus.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 404952) with original publication details: Rep. (Annual) Missouri Bot. Gard. 10: 41 1899.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:396041-1.
This name was in version 1 of The Plant List, record kew-404952.