Oenothera laciniata
Oenothera dodgeniana
cut-leaf evening-primrose, southern evening primrose
erect to ascending, unbranched to much branched, 5–50 cm.
1 or few-branched from base, 50–120 cm.
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.
in a basal rosette and cauline, basal 6–20 × 1–3 cm, blade lanceolate to narrowly elliptic;
cauline 5–10 × 1–2.5 cm, blade lanceolate to narrowly elliptic, margins subentire or repand-denticulate.
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.
4-merous, zygomorphic, opening at sunset;
floral tube 10–11 mm;
sepals 11–15 mm;
petals white, fading pink, rhombic-obovate, 11–14 mm;
filaments 6.5–9 mm, anthers 2.5–4 mm, pollen 90–100% fertile;
style 22–28 mm, stigma exserted beyond anthers.
cylindrical, sometimes slightly enlarged toward apex, 20–50 × 2–4 mm.
ellipsoid or ovoid, sharply 4-angled, with deep furrows alternating with angles for 2–3 mm from apex, ribbed from base of furrow to base of fruit, 9–11 × 3–5 mm;
sessile.
ellipsoid to subglobose, 0.9–1.8 × 0.4–0.9 mm.
2–4, yellowish to light brown, 2–3 mm.
= 14.
= 14.
Oenothera laciniata
Oenothera dodgeniana
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 dodgeniana occurs in two disjunct areas: the western foothills of the San Juan Mountains in Archuleta and Huerfano counties, Colorado, and Rio Arriba County, New Mexico; and Sierra Blanca and Sacramento Mountains in Lincoln and Otero counties, south-central New Mexico. The species was collected once at Durango, La Plata County, Colorado (P. H. Raven and D. P. Gregory 1972[1973]), but has not since been recollected. Oenothera dodgeniana and O. coloradensis were considered by Raven and Gregory to represent a relict species along the eastern flank of the Rocky Mountains that arose from more widespread species farther to the east, such as O. filiformis. Oenothera dodgeniana belongs to a subclade which is sister to that containing O. coloradensis, and within that subclade is sister to O. demareei and O. lindheimeri (W. L. Wagner et al. 2013). Although O. dodgeniana is fairly closely related to O. coloradensis, the two taxa seem to have had independent origins that have led to distributions along the eastern flank of the Rocky Mountains. Oenothera dodgeniana is self-compatible (Raven and Gregory).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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