Oenothera hispida -- California

Oenothera hispida is a perennial herb in the Onagraceae family that is native to eastern and central Texas, and central Mexico. This species is considered invasive in California and is listed as a noxious weed. Documentation for this species is lacking outside of it's native range: while there is documentation from the 1970's of this species becoming naturalized in Arkansas and Georgia, there are no validated records of the species outside of it's native range and invasive range in California.
Oenothera hispida is a small plant, rarely reaching half a meter with the height of the inflorescences, however it spreads aggressively through rhizomes and can create dense mats. This species is generally found in disturbed sandy soils, prairies, and open grasslands, and appears to grow in both fertilized agricultural soils, and soils with high salinity.
This species is on California's noxious weed list, and this evaluation gives it a score that should considerate moderately invasive. There is a distinct lack of literature about this species of Oenothera, likely because it has a relatively small native range and has not become invasive world-wide. Some inferences were made in this evaluation based off of closely related Oenothera species that have more available peer-reviewed literature.