@nathantaylor7583 @sambiology

here's the one for O. suffulta
http://plantsoftheworldonline.org/taxon/urn:lsid:ipni.org:names:77092962-1

see Wagner et al. 2013 on the split:

Trans-Pecos Texas and northern Coahuila, Mexico, north to Bernalillo and Torrance counties, New Mexico, in washes and other sandy places, grasslands, and extending to pinyon-juniper woodlands; 1220–2140 m. Raven and Gregory (1972) considered Oenothera nealleyi to represent an unevenly intergrading entity with Oenothera suffulta based on geographical merging of some of the characteristics that distinguish them and because the entity from Terrell County, Texas, described as Gaura suffulta var. terrellensis Munz has a combination of characteristics of the two taxa. The origin of these plants from Terrell County should be further explored. For now we here continue to include this name in the synonymy of Oenothera nealleyi. The molecular data (Krakos 2011; unpubl.) suggest that Oenothera nealleyi is not as closely related to Oenothera suffulta as suggested by Raven and Gregory (1972), given the placement in the phylogeny and the difference in scent profiles for these two taxa. Oenothera suffulta is a member of a strongly supported clade (Fig. 1) consisting of it along with Oenothera triangulata and Oenothera patriciae, while Oenothera nealleyi is a member of a polytomy that consists of other species of subsect. Gaura, with the Oenothera suffulta - Oenothera triangulata - Oenothera patriciae clade sister to it. Oenothera nealleyi has a strong sweet scent, characterized by benzaldehyde (almond), cinnamaldehyde, cinnamic alcohol (cinnamon), methyl salicylate and its methyl ether (wintergreen), neral and geranial (citronella), and nerol and geraniol (lemon) (R. Raguso, pers. comm.), whereas Oenothera suffulta does not have a discernible scent. This difference in scent probably plays a key role in the pollination syndromes for these species.

I guess my question is should we bother splitting it here on iNaturalist? Or should we just merge Gaura suffulta into O. suffulta? Wagner 2013 doesn't comment on how common O. nealleyi is, i.e. what percentage of Gaura/Oenothera suffulta (sensu stricto) observations on iNat could actually be O. nealleyi?

Powell's new book will accept O. nealleyi at the species level, which is good enough for me. In Texas, it is apparently confined to but widespread in the Trans-Pecos region. Not sure outside of Texas, though.