This name is a synonym of Pyrrocoma apargioides (A.Gray) Greene.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record B66AB1CC-1EC9-4D5B-B5FC-3184BD0C08FA) with original publication details: Revis. Gen. Pl. 1: 317 (1891) 317 1891.
This name was in version 1 of The Plant List, record gcc-26796, and has not been changed.