Oenothera primiveris
Oenothera primiveris is a species of flowering plant in the evening primrose family known by the common names yellow desert evening primrose, bottle evening-primrose, and desert evening-primrose.[1][2]
| Oenothera primiveris | |
|---|---|
 | |
| Oenothera primiveris subsp. bufonis | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Onagraceae |
| Genus: | Oenothera |
| Species: | O. primiveris |
| Binomial name | |
| Oenothera primiveris | |
Habitat
It is native to the southwestern United States and northern Mexico.[2][3]
It grows below 4,500 feet (1,400 m) in many types of flat desert habitats, including Creosote bush scrub, Joshua tree woodland, and Pinyon-juniper woodland.[1] It is found in the Mojave Desert.[1][2]
Description
Oenothera primiveris is a hairy annual herb producing a dense rosette of leaves in which the inflorescence occurs. There is generally no true stem.[4]
The green or grayish leaves are up to 28 centimeters long and have wavy or crinkled edges, or are cut into deep lobes or teeth.[4]
Flowers arise from the axils of the leaves. Each flower has yellow petals up to 4 centimetres (1.6 in) in length which fade orange or red with age.[4] Its bloom period is February through May.[1][2]
The fruit is a straight or curving capsule up to 6 centimetres (2.4 in) in length.[4]