Single Record
Participant Info
- Species
- Oenothera albicaulis [Anogra albicaulis] [Oenothera ctenophylla]
- Family
- Onagraceae
- CommonName
- whitestem evening primrose
- Presence
- Yes
- Status
- native
- EarliestDate
- 1912
- LatestDate
- 2022
- Ecosystem
- basin, foothill, ruderal, sanddunes
- Geobotanical
- SSawatch, SSanjuans, Culebras, NCristos, UBasin
- Counties
- Alamosa, Conejos, Costilla, Rio Grande, Saguache
- Passes
- WildlifePreserves
- Dry Creek, Great Sand Dunes, Hot Creek, San Luis Lakes
- Other Localities
- La Botica
- Comments
- On both sides of the Valley, white-stemmed evening primrose prefers sandy soil and open terrain. Occasionally it takes advantage of disturbed ground, for instance beside gravel roads. A recent record from the Great Sand Dunes NPP is iNaturalist observation #217593221 (22 May 2024). Oenothera albicaulis is a Rocky Mountains and desert Southwest plant that follows the Rio Grande drainage one county past the Big Bend of Texas. Note that in the Watershed, O. albicaulis can be mistaken for O. pallida subsp. trichocalyx. The surest way to distinguish them is by their capsules (seedpods). That of O. albicaulis is less hairy and four-angled in cross section. That of O. pallida subsp. trichocalyx is covered with long hairs and round in cross section.
- Annotation