Bromus mollis and Bromus hordeaceous are synonyms. Please merge them. (e.g. see https://www.inaturalist.org/observations/25391763)
can you flag the taxa (either one of the species or the genus) on inaturalist? That will get faster results from taxonomy curators, who don’t necessarily monitor this forum.
How does one flag taxa?
see screenshot below. I’d flag it myself but am not totally sure of the issues involved and don’t have time to look it up now. Screenshot is from the bromus genus page: https://www.inaturalist.org/taxa/52701-Bromus