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Oenothera laciniata

Hill (1768)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Myrtales Family: Onagraceae Genus: Oenothera

cutleaved evening primrose, cut-leaved evening primrose

Description

Key Characters:

Growth Form: Annual herbs.

Stems: Stems erect to procumbent, 0.5–5 dm long, usually branched, strigillose, sparsely villous, and usually glandular pubescent in inflorescence.

Roots: Taprooted.

Leaves: Leaves simple. Alternate. Basal leaves oblanceolate; cauline leaves narrowly obovate to narrowly elliptic, basal leaves 5–13 cm long, 1–3 cm wide, cauline leaves 2–10 cm long, 0.4–3.5 cm wide. Margins of basal leaves lobed or dentate; cauline leaves lobed, dentate, or occasionally subentire. Stipules absent.

Flowers: Flowers solitary in the leaf axils, usually only 1 opening each day per stem near sunset. Flowers bisexual (perfect), actinomorphic, 4-merous, in the leaf axils, opening near sunset or near sunrise. Sepals with distinct tips 1–3 mm long, valvate. Petals pale yellow or yellow, broadly obcordate, 0.5–1.3(–2) cm long. Stamens 8, in two series; anthers versatile, the sporogenous tissue in each locule undivided, dithecal, opening by longitudinal slits. Pollen ca. 50% fertile. Ovary inferior, as many cells and carpels as sepals; ovules anatropous; style 1; stigma deeply 4-lobed, the lobes linear, surrounded by anthers at anthesis.

Fruit: Capsules 2.5–5 cm long. Seeds in 2 rows per cell; ellipsoid to subglobose; 0.8–1.8 mm long; the surface pitted.

Ploidy: 2n = 14

Habitat: Open sites.

Elevation Range:

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

Mokupāpapa (Kure atoll) Naturalized
Kuaihelani (Midway Atoll) Naturalized
Maui Naturalized
Hawai'i Naturalized

Dispersal Agents


Pollinators

Bibliography

Name Published In: Hort. Kew.: 172/4 (1768)

Other References

Wagner et al. 1990:1000 (Mi, M, H); Wagner & Herbst 1995:22 (Ku); Starr & Starr 2012:89 (EM, high elev record)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Oenothera laciniata Kamuela Common weed in farms, growing with Sida rhombifolia, Nicandra physalodes, and other weeds. Preserved_Specimen Flowers yellow. Davis, J. 511 Hawaii BISH 1981-06-14
2 Oenothera laciniata Near tennis court Preserved_Specimen Saito, R. Kure Atoll BISH 1986-05-08
3 Oenothera laciniata Kamuela Preserved_Specimen Kami, R. Hawaii BISH 1965-05-05
4 Oenothera laciniata Makawao, Kula Occasional in abandoned corn field. Preserved_Specimen Flowers yellow. Hosaka, E.Y. 2479 Maui BISH 1939-04-14
5 Oenothera laciniata Puu Kapu Homestead, east of Waimea along Hwy. 19, Marie McDonald's Prootea and cut-flower farm Preserved_Specimen Wagner, W.L. 5544 Hawaii BISH 1985-06-23
6 Oenothera laciniata East Maui, Haleakala National Park summit at Sliding Sands Trailhead. Preserved_Specimen Welton, P. Maui BISH 2015-06-08
7 Oenothera laciniata Haleakala Nat'l Park, HVC parking lot. In the cinder. Naturalized. Weedy alpine desert vegetation with Erodium, Deschampsia, and Dubautia. Preserved_Specimen A few dozen plants. Starr, F. 11061502 Maui BISH 2011-06-15
8 Oenothera laciniata Makawao, Olinda Preserved_Specimen Flowers yellow. Prostrate. Hosaka, E.Y. 1837 Maui BISH 1937-04-08
9 Oenothera laciniata North of Pulehu Gulch, Upper Kula Road, near junction with Haleakala highway Very local in pasture on gentle slope, thin soil on lava rock Preserved_Specimen Flowers yellow, closed in late afternoon Fosberg, F.R. 55460 Maui BISH 1974-04-15
10 Oenothera laciniata Along upper Kula road by Kealaloa Road Jct Preserved_Specimen Flowers with four broad yellow petals. Hobdy, R.W. 1407 Maui BISH 1982-06-04
11 Oenothera laciniata Kula Preserved_Specimen Naturalized roadside weed. Degener, O. 28185 Maui BISH 1939-07-26
12 Oenothera laciniata Old Volcano House Grassy area. Preserved_Specimen 4-12 tall; yellow flowers Fagerlund, G.O. 466 Hawaii BISH 1943-03-15
13 Oenothera laciniata Kula, T. H. (Thirty Hill) Preserved_Specimen Naturalized roadside weed; new record Degener, O. 12593 Maui BISH 1939-07-26
14 Oenothera laciniata Hawaii Volcanoes National Park, Kilauea, National Park Residence Area Preserved_Specimen Decumbent branched stem, flowers yellow, stigmas 4. Fosberg, F.R. 45155 Hawaii BISH 1964-03-15
15 Oenothera laciniata Kula Preserved_Specimen Garden weed. Degener, O. 23720 Maui BISH 1954-11-17
16 Oenothera laciniata Kilauea, Volcanoe House Preserved_Specimen Herbaceous, flowers yellow. Student at University of Hawaii 98 Hawaii BISH 1933-07-06
17 Oenothera laciniata East Maui, Jula Preserved_Specimen Many orange-yellow flowers. Nishida, T. Maui BISH 1945-07-07
18 Oenothera laciniata Roadside, Haleakala Highway in pasturelands Preserved_Specimen Sprawling shrub. Flowers yellow. Nagata, K.M. 3544 Maui BISH 1986-07-25
19 Oenothera laciniata Lawn, Research Center HVNP Preserved_Specimen Stemmermann, R.L. 6774 Hawaii BISH 1981-06-01
20 Oenothera laciniata Naturalized in research Center lawn, HVNP Preserved_Specimen Stemmermann, R.L. 6774 Hawaii BISH 1981-06-01
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