⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Horkelia frondosa in version 1.1 of The Plant List.
This name is a synonym of Horkelia californica var. frondosa .
The record derives from Tropicos which reports it as a synonym (record 27800931
) with original publication details: Bull. Torrey Bot. Club 25(1): 54 54 1898.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:1061708-2
.