''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.
[ Calflora Database: ''Oenothera primiveris'' ]
/ref>[ Lady Bird Johnson Wildflower Center-NPIN: ''Oenothera primiveris'']
/ref>
Habitat
It is native to the southwestern United States and northern Mexico.[
It grows below in many types of flat desert habitats, including ]Creosote bush scrub Creosote bush scrub is a North American desert vegetation type (or biome) of sparsely but evenly spaced desert plants dominated by creosote bush (''Larrea tridentata'') and its associates. Its visual characterization is of widely spaced shrubs that ...
, Joshua tree woodland
Joshua () or Yehoshua ( ''Yəhōšuaʿ'', Tiberian: ''Yŏhōšuaʿ,'' lit. 'Yahweh is salvation') ''Yēšūaʿ''; syr, ܝܫܘܥ ܒܪ ܢܘܢ ''Yəšūʿ bar Nōn''; el, Ἰησοῦς, ar , يُوشَعُ ٱبْنُ نُونٍ '' Yūšaʿ ...
, and Pinyon-juniper woodland.[ It is found in the ]Mojave Desert
The Mojave Desert ( ; mov, Hayikwiir Mat'aar; es, Desierto de Mojave) is a desert in the rain shadow of the Sierra Nevada mountains in the Southwestern United States. It is named for the indigenous Mojave people. It is located primarily in ...
.[
]
Description
''Oenothera primiveris'' is a hairy annual
Annual may refer to:
* Annual publication, periodical publications appearing regularly once per year
**Yearbook
** Literary annual
* Annual plant
* Annual report
* Annual giving
* Annual, Morocco, a settlement in northeastern Morocco
* Annuals (b ...
herb producing a dense rosette of leaves in which the inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...
occurs. There is generally no true stem.[Jepson eFlora: ''Oenothera primiveris'']
/ref>
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.[
Flowers arise from the axils of the leaves. Each flower has yellow petals up to in length which fade orange or red with age.][ Its bloom period is February through May.][
The fruit is a straight or curving capsule up to in length.][
]
Subspecies
* ''Oenothera primiveris'' subsp. ''bufonis'' — Large yellow desert primrose, endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
to the Mojave Desert in California & Nevada.
* ''Oenothera primiveris'' subsp. ''primiveris'' Calflora Database: ''Oenothera primiveris'' ssp. ''primiveris''
/ref>
References
External links
Calflora Database: ''Oenothera primiveris'' (Yellow desert evening primrose)Jepson Manual eFlora (TJM2) treatment of ''Oenothera primiveris''UC CalPhotos gallery of ''Oenothera primiveris'' images
{{-
primiveris
North American desert flora
Flora of the California desert regions
Flora of Northwestern Mexico
Flora of Arizona
Flora of Nevada
Flora of New Mexico
Flora of Texas
Flora of Utah
Flora of the Colorado Plateau and Canyonlands region
Natural history of the Mojave Desert
Night-blooming plants
Taxa named by Asa Gray
Flora without expected TNC conservation status