Oenothera laciniata

Hill

Veg. Syst. 12(app.): 64, plate 10. 1767.

Synonyms: Oenothera minima Pursh O. repanda Medikus O. sinuata Linnaeus O. sinuata var. minima (Pursh) Nuttall Onagra sinuata (Linnaeus) Moench Raimannia laciniata (Hill) Rose ex Britton & A. Brown
Treatment appears in FNA Volume 10.

Herbs annual, sparsely to moderately strigillose, some­times also villous, sometimes also becoming glandular puberulent distally. Stems erect to ascending, un­branched to much branched, 5–50 cm. Leaves in a basal rosette and cauline, basal 4–15 × 1–3 cm, cauline 2–10 × 0.5–3.5 cm; blade green, narrowly oblanceolate to narrowly elliptic or narrowly oblong, margins usually dentate or deeply lobed; bracts spreading, flat. Flowers usually 1 opening per day near sunset; buds erect, with free tips erect, 0.3–3 mm; floral tube 12–35 mm; sepals 5–15 mm; petals yellow, fading orange or reddish tinged, broadly obovate or obcordate, 5–22 mm; filaments 3–14 mm, anthers 4–5 mm, pollen ca. 50% fertile; style 20–50 mm, stigma surrounded by anthers at anthesis. Capsules cylindrical, sometimes slightly enlarged toward apex, 20–50 × 2–4 mm. Seeds ellipsoid to subglobose, 0.9–1.8 × 0.4–0.9 mm. 2n = 14.


Phenology: Flowering (Feb–)Apr–Sep(–Oct).
Habitat: introduced nearly worldwide in temperate and subtropical areas..
Elevation: 0–1000(–1300) m.

Distribution

Ala., Ark., Calif., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis., Wyo., introduced nearly worldwide in temperate and subtropical areas.

Discussion

Oenothera laciniata is a PTH species and forms aring of 14 chromosomes in meiosis, and is self-compatible and autogamous (W. Dietrich and W. L. Wagner 1988).

Oenothera laciniata is known in New Mexico from Doña Ana and Roosevelt counties from non-montane habitats and thus do not appear to represent O. pubescens; however, a few collections from Brewster and Jeff Davis counties, Texas, reported by W. Dietrich and W. L. Wagner (1988) as O. laciniata appear to represent collections of O. pubescens. Dietrich and Wagner found that O. laciniata hybridizes not only with O. grandis, but also with O. drummondii subsp. drummondii, O. humifusa, and O. mexicana. It is naturalized nearly worldwide in temperate and subtropical areas.

Selected References

None.

Lower Taxa

None.
... more about "Oenothera laciniata"
Warren L. Wagner +
Raimannia rose +
Ala. +, Ark. +, Calif. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +, Wis. +, Wyo. +  and introduced nearly worldwide in temperate and subtropical areas. +
0–1000(–1300) m. +
introduced nearly worldwide in temperate and subtropical areas.. +
Flowering (Feb–)Apr–Sep(–Oct). +
Oenothera minima +, O. repanda +, O. sinuata +, O. sinuata var. minima +, Onagra sinuata +  and Raimannia laciniata +
Oenothera laciniata +
Oenothera subsect. Raimannia +
species +