⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50129486, with some changes.
This name is a synonym of Onagra cruciata (Nutt. ex G. Don) Small.
The record derives from Tropicos which reports it as a synonym (record 50129486) with original publication details: Fl. N. Amer. 1(3): 492 492 1840.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:172762-2.