''Oenothera hartwegii'' (syn. ''Calylophus hartwegii''), Hartweg's sundrops, is a species of flowering plant in the evening primrose family Onagraceae. It is native to the desert southwest of the United States, and to northern and western Mexico. A perennial usually tall and wide, it is used locally as a drought-resistant ground cover.

Subtaxa

The following subspecies are accepted: *''Oenothera hartwegii'' subsp. ''fendleri'' – Arizona, New Mexico, Kansas, Oklahoma, Texas, northeastern Mexico *''Oenothera hartwegii'' subsp. ''filifolia'' – New Mexico, Texas, northeastern Mexico *''Oenothera hartwegii'' subsp. ''hartwegii'' – Colorado, Texas, northern and western Mexico *''Oenothera hartwegii'' subsp. ''maccartii'' – Texas, northeastern Mexico *''Oenothera hartwegii'' subsp. ''pubescens'' – Arizona, New Mexico, Colorado, Kansas, Oklahoma, Texas, northeastern Mexico

References

hartwegii Flora of Arizona Flora of Colorado Flora of Kansas Flora of Oklahoma Flora of the South-Central United States Flora of Northwestern Mexico Flora of Northeastern Mexico Flora of Southwestern Mexico Plants described in 1839 {{Myrtales-stub