Oenothera hartwegii explained

Oenothera hartwegii (syn. Calylophus hartwegii), Hartweg's sundrops, is a species of flowering plant in the evening primrose family Onagraceae.^[1] It is native to the desert southwest of the United States, and to northern and western Mexico.^[2] A perennial usually tall and wide, it is used locally as a drought-resistant ground cover.^[1]

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

Notes and References

1. Web site: Calylophus hartwegii . . 2012 . Campus Arboretum . University of Arizona . 5 December 2023 . Botanical Synonyms: Oenothera hartwegii .
2. 173039-2 . Oenothera hartwegii Benth. . 5 December 2023 .