Oenothera neomexicana |
Oenothera xylocarpa |
|
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New Mexico evening-primrose |
wood fruit evening primrose, woodyfruit evening primrose |
|
Habit | Herbs perennial, glabrate proximally, strigillose and villous distally; from a taproot, also with lateral roots producing adventitious shoots. | Herbs perennial, acaulescent, densely short-hirsute, also sometimes sparsely long-hirsute distally; from a thick, fleshy taproot. |
Stems | erect or ascending, unbranched or branched, 30–60 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, 2.6–4.2(–6.2) × 1.4–4.2 cm; petiole 2.5–9(–11.5) cm; blade usually oblanceolate to obovate, sometimes suborbiculate, margins dentate, pinnately lobed, lateral lobes oblong to lanceolate, often absent or reduced to only a few lobes toward terminal lobe, base rounded to cordate. |
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. |
usually 1–3, rarely more, opening per day near sunset; buds erect, quadrangular, without free tips; floral tube 27–45(–55) mm; sepals 25–30 mm; petals intensely yellow, fading deep salmon red, obcordate, 25–38 mm; filaments 17–23 mm, anthers 7–10 mm; style 44–65(–80) mm, stigma somewhat exserted beyond 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. |
moderately thin and flexible, lanceoloid, falcate or sigmoid, often contorted and twisted, 4-angled, 35–90 × 7–11 mm, gradually tapering to a long, slender, sterile apex, 10–30(–40) mm, valves conspicuously wrinkled, dehiscent 2/3–3/4 their length; sessile. |
Seeds | numerous, in 1 row per locule, dark brown, narrowly obovoid, 1.5 mm. |
numerous, in 1 row per locule, often forming 2 rows near base of capsule, obovoid, 2.4–3.2 × 1.3–1.7 mm, surface coarsely rugose. |
2n | = 14. |
= 14. |
Oenothera neomexicana |
Oenothera xylocarpa |
|
Phenology | Flowering (Mar–)Jun–Jul(–Sep). | Flowering Jun–Jul(–Aug). |
Habitat | Uncommon, in rocky or sandy clay or loamy soil in coniferous forest openings, stream valleys, roadsides. | Open meadows, flats or slopes on loose granitic gravel, sand, or pumice in Pinus jeffreyi forests with Artemisia tridentata, or in Pinus contorta subsp. murrayana and Abies magnifica forests. |
Elevation | 1500–3300 m. (4900–10800 ft.) | 2200–3100 m. (7200–10200 ft.) |
Distribution |
AZ; NM
|
CA; NV |
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 xylocarpa is known from three disjunct areas in California and adjacent Nevada: Mount Rose, Washoe County, Nevada; southern Sierra Nevada, southwestern Mono County, California, from the vicinity of Crestview south to Casa Diablo; and the area in the southern Sierra Nevada bounded by Horseshoe and Big Whitney meadows to the east and north, and Casa Vieja and Volcano Meadows to the south and west, west-central Inyo and eastern Tulare counties, California. (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. Contortae |
Sibling taxa | ||
Synonyms | Anogra neomexicana | Anogra xylocarpa |
Name authority | (Small) Munz: Amer. J. Bot. 18: 317. (1931) | Coville: Contr. U.S. Natl. Herb. 4: 105, plate 8. (1893) |
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