This name is a synonym of Isocoma acradenia (Greene) Greene.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 12D5C9E2-A5A2-4EB9-8C15-C701055AB05C) with original publication details: Bull. Torrey Bot. Club 10 126 1883.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:273290-2.
This name was in version 1 of The Plant List, record gcc-120223.