Oenothera neomexicana |
Oenothera curtissii |
|
---|---|---|
New Mexico evening-primrose |
Curtiss' evening primrose |
|
Habit | Herbs perennial, glabrate proximally, strigillose and villous distally; from a taproot, also with lateral roots producing adventitious shoots. | Herbs biennial or short-lived perennial, densely to sparsely strigillose, sometimes also sparsely glandular puberulent distally. |
Stems | erect or ascending, unbranched or branched, 30–60 cm. |
sometimes with lateral branches arisingobliquely from rosette, 30–80 cm. |
Leaves | in a basal rosette and cauline, rosette weakly developed or absent, at least during flowering, 3–9 × (0.6–)1–2.5 cm; petiole 0–2 cm; blade oblong to lanceolate or narrowly ovate, margins irregularly sinuate-dentate. |
in a basal rosette and cauline, basal 7–17 × 0.5–1.5 cm, cauline 2–8 × 0.5–1.5 cm; blade narrowly oblanceolate, gradually narrowly elliptic to narrowly oblong distally, margins lobed to remotely dentate or subentire; bracts slightly longer than capsule they subtend. |
Inflorescences | open, lax, without lateral branches, mature buds usually not overtopping spike apex. |
|
Flowers | 1–several opening per day near sunset; buds nodding, weakly quadrangular, with free tips 0.5–4 mm; floral tube 30–50 mm; sepals 20–30 mm, not spotted; petals white, fading pink, broadly obovate, 20–30 mm; filaments 10–15 mm, anthers 8–15 mm; style 50–70 mm, stigma exserted beyond anthers at anthesis. |
1 or 2 per spike opening per day near sunset; buds erect, with free tips erect to spreading, 0.3–0.8 mm; floral tube slightly curved upward to straight, 23–37 mm; sepals 7–13 mm; petals yellow, broadly elliptic to rhombic-ovate, 8–17 mm; filaments 6–10 mm, anthers 1.5–4 mm, pollen ca. 50% fertile; style 30–45 mm, stigma surrounded by anthers at anthesis. |
Capsules | erect or strongly ascending, not woody, straight or slightly curved, subcylindrical, obtusely 4-angled, tapering gradually from base to apex, 20–30 × 2–3 mm; sessile. |
narrowly lanceoloid, 10–25 ×2–3 mm. |
Seeds | numerous, in 1 row per locule, dark brown, narrowly obovoid, 1.5 mm. |
brown, sometimes flecked with darkred spots, ellipsoid, 1–1.3 × 0.5–0.7 mm. |
2n | = 14. |
= 14. |
Oenothera neomexicana |
Oenothera curtissii |
|
Phenology | Flowering (Mar–)Jun–Jul(–Sep). | Flowering Jun–Sep. |
Habitat | Uncommon, in rocky or sandy clay or loamy soil in coniferous forest openings, stream valleys, roadsides. | Dry places, pine-oak woods, fields, roadsides, sandy soil. |
Elevation | 1500–3300 m. (4900–10800 ft.) | 0–60 m. (0–200 ft.) |
Distribution |
AZ; NM
|
AL; FL; GA; SC |
Discussion | Oenothera neomexicana is known from central to western New Mexico west of the Rio Grande Valley, except for the Organ Mountains, and eastern and central Arizona from the White Mountains south to Mount Graham and northwestward across the Mogollon Rim in Coconino and Yavapai counties. Oenothera neomexicana had been assumed to be self-incompatible (W. L. Wagner et al. 2007), but K. E. Theiss et al. (2010) determined one population sampled to be consistently self-compatible. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera curtissii is a PTH species and forms a ring of 14 chromosomes in meiosis, and is self-compatible and autogamous (W. Dietrich and W. L. Wagner 1988). It is known only from northern Florida, adjacent southern Georgia and southeastern Alabama, and one disjunct locality in South Carolina (Allendale County). (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. Anogra | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Oenothera > subsect. Candela |
Sibling taxa | ||
Synonyms | Anogra neomexicana | O. heterophylla var. curtissii |
Name authority | (Small) Munz: Amer. J. Bot. 18: 317. (1931) | Small: Fl. S.E. U.S. ed. 2, 1353. (1913) |
Web links |