This name is a synonym of Pinus attenuata Lemmon.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 380068) with original publication details: J. Hort. Soc. London 4: 218 1849.
This name was in version 1 of The Plant List, record kew-2562232, and has not been changed.