⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-29200090, and has not been changed.

Orthocarpus attenuatus A. Gray is a synonym of Castilleja attenuata (A. Gray) T.I. Chuang & Heckard

This name is a synonym of Castilleja attenuata (A. Gray) T.I. Chuang & Heckard.

The record derives from Tropicos which reports it as a synonym (record 29200090) with original publication details: Pacif. Railr. Rep. 4(5): 121 121 1857.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:317345-2.