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Tufted Evening-primrose - Oenothera caespitosa
Other Names:
Oenothera cespitosa
Native Species
Global Rank:
G5
State Rank:
S5
C-value:
4
Agency Status
USFWS:
USFS:
BLM:
External Links
General Description
Acaulescent perennial with a simple or branched caudex surmounting a taproot. Herbage strigose. Leaves oblanceolate, 2–15 cm long with entire to serrate margins. Flowers white, opening at night, turning pink the following morning; hypanthium 2–8 cm long; sepals 1–3 cm long; petals 15–35 mm long; stigma lobes 3–6 mm long. Capsule erect, narrowly ovoid to ellipsoid, 12–40 mm long, woody, vaguely 4-angled, usually bumpy, sometimes pedicellate, often partly below ground (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Our plants are subspecies
caespitosa.
Species Range
Montana Range
Range Descriptions
Native
Range Comments
WA to SK, south to CA, NM, TX and Mexico (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations: 188
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Sandy or clay, usually sparsely-vegetated soil of open slopes, badlands, sandhills, roadsides; plains, valleys to subalpine (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Ecology
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus pensylvanicus and
Bombus impatiens (Colla and Dumesh 2010).
Stewardship Responsibility
References
- Literature Cited AboveLegend:
View Online Publication
Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141:39-68.- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.
- DuBois, K.L. 1979. An inventory of the avifauna in the Long Pines of Southeastern Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 113 p.
- Harvey, S.J. 1990. Responses of steppe plants to gradients of water soil texture and disturbance in Montana, U.S.A. Ph.D. Thesis. Bozeman, MT: Montana State University. 34 p.
- Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
- Mackie, R.J. 1965. Range ecology and relationships of mule deer, elk, and cattle in the Missouri River breaks. Ph.D Dissertation. Bozeman, MT: Montana State University. 229 p.
- Martin, S.A. 1985. Ecology of the Rock Creek bighorn sheep herd, Beartooth Mountains, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 152 p.
- Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
- Rundquist, V.M. 1973. Avian ecology on stock ponds in two vegetational types in north-central Montana. Ph.D. Dissertation. Bozeman, MT: Montana State University. 112 p.
- Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
- Web Search Engines for Articles on "Tufted Evening-primrose"
