Oenothera laciniata |
Oenothera toumeyi |
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cut-leaf evening-primrose, southern evening primrose |
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Habit | Herbs annual, sparsely to moderately strigillose, sometimes also villous, sometimes also becoming glandular puberulent distally. | Herbs perennial or sometimes annual, glabrate to strigillose throughout; from a stout taproot. |
Stems | erect to ascending, unbranched to much branched, 5–50 cm. |
1–several, ascending to erect, unbranched to densely branched, 15–70 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. |
1–3.5 × 0.1–0.7 cm, fascicles of small leaves 0.2–2.5 cm present in non-flowering axils; petiole 0 cm; blade narrowly lanceolate, base acute-attenuate, margins entire or obscurely and sparsely serrulate, not undulate, apex acute. |
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. |
usually 1 per stem opening per day at sunset; buds with free tips 2–9(–12) mm; floral tube (15–)30–60(–70) mm, funnelform in distal 1/2 or less; sepals 10–25 mm; petals yellow, fading pale pink or pale purple, 10–20 mm; filaments 4–12 mm, anthers 6–10 mm, pollen 85–100% fertile; style 35–70(–80) mm, stigma yellow, quadrangular, usually exserted beyond anthers. |
Capsules | cylindrical, sometimes slightly enlarged toward apex, 20–50 × 2–4 mm. |
10–50 × 1.5–4 mm, somewhat papery, promptly dehiscent in distal 1/2. |
Seeds | ellipsoid to subglobose, 0.9–1.8 × 0.4–0.9 mm. |
obovoid, 2–3 mm. |
2n | = 14. |
= 14. |
Oenothera laciniata |
Oenothera toumeyi |
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Phenology | Flowering (Feb–)Apr–Sep(–Oct). | Flowering (May–)Jul–Oct. |
Habitat | introduced nearly worldwide in temperate and subtropical areas.. | Local and uncommon on shaded, rocky slopes or disturbed areas, pine-oak forests. |
Elevation | 0–1000(–1300) m. (0–3300(–4300) ft.) | 1500–2600 m. (4900–8500 ft.) |
Distribution |
AL; AR; CA; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; ND; NE; NJ; NM; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WI; WV; WY [Introduced nearly worldwide in temperate and subtropical areas]
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AZ; NM; Mexico (Chihuahua, Sonora) |
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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera toumeyi occurs locally from the Chiricahua, Huachuca, and Santa Rita mountains in Cochise and Santa Cruz counties, Arizona, and the Mogollon Mountains in southern Catron County, New Mexico, south through northeastern Sonora in the Sierra Madre Occidental to west-central Chihuahua. H. F. Towner (1977) found that O. toumeyi is self-incompatible and vespertine. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 10. | FNA vol. 10. |
Parent taxa | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Oenothera > subsect. Raimannia | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Calylophus > subsect. Salpingia |
Sibling taxa | ||
Synonyms | O. minima, O. repanda, O. sinuata, O. sinuata var. minima, Onagra sinuata, Raimannia laciniata | Galpinsia toumeyi, Calylophus hartwegii subsp. toumeyi, C. hartwegii var. toumeyi, C. toumeyi, O. hartwegii var. toumeyi |
Name authority | Hill: Veg. Syst. 12(app.): 64, plate 10. (1767) | (Small) Tidestrom: Proc. Biol. Soc. Wash. 48: 41. (1935) |
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