⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-50316511, with some changes.

Orthocarpus pilosus var. arachnoideus (Greenm.) Jeps. is a synonym of Castilleja arachnoidea Greenm.

This name is a synonym of Castilleja arachnoidea Greenm..

The record derives from Tropicos which reports it as a synonym (record 50316511) with original publication details: Man. Fl. Pl. Calif. 940 940 1925.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:176769-2.