The record derives from TICA
(data supplied on )
which reports it as a synonym (record
4F126DE9-31DC-43E1-A606-C8326F6FBC81) with original publication details: "J.E. Smith, Fl. Brit. 2. 1800" 824 1800.
This name record (from TICA) 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 Hedypnois hirta in version 1 of The Plant List.