This observation indicates that this taxon is critically endangered in California. However, clicking through to the taxon page, there is no indication that this is actually the case.
Cassi’s response explains why this status is showing up for P. scouleri when it shouldn’t, so someone needs to edit / remove that status.
I am currently seeing threatened statuses under the “Status” tab at https://www.inaturalist.org/taxa/166953-Plagiobothrys-scouleri, so there is indication that they’re endangered. If you’re referring to the red bar that sometimes appears at the top of the taxon page, that only appears when there’s a global threatened status, or when a threatened status appears within scope of your default search place. My default search place is California and I see
but if I sign out I don’t see that, b/c there’s no reason to assume someone who isn’t specifically interested in California would care about California-specific statuses.