Flora of North America species comparison

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Oenothera pallida subsp. runcinata

Onagraceae subfam. onagroideae
Photo is of parent taxon
Habit Herbs perennial, strigillose, sometimes also sparsely villous, or glabrous; from a taproot, lateral roots producing adventitious shoots.
Stems

usually branched throughout.

Leaves

rosette not present at anthesis, 2–3.5(–5) × 0.4–1(–1.5) cm;

blade oblong to narrowly lanceolate, margins usually deeply sinuate-dentate to pinnatifid, rarely dentate only.

stipules present or absent.
Flowers

buds with free tips 0–0.2 mm;

floral tube 15–30 mm;

sepals 10–25 mm;

petals 10–30 mm.

floral tube present or, rarely, absent;

sepals 2 or 4 (very rarely 3), deciduous with floral tube, petals, and stamens;

petals yellow, white, pink, red, rarely in combination.
Capsules

spreading to reflexed, straight or curved, sometimes contorted.

xI> = 7, 10, 11, 15, 18.

2n

= 14.

Oenothera pallida subsp. runcinata

Onagraceae subfam. onagroideae
Phenology Flowering (Apr–)May–Sep.
Habitat Sandy soil, dunes, disturbed areas, alkaline soil, pinyon-juniper woodlands, shrublands with Artemisia, Ericameria, or Prosopis, open ponderosa pine woodlands.
Elevation 1100–2400 m. (3600–7900 ft.)
Distribution
from FNA
AZ; CO; NM; TX; UT; Mexico (Chihuahua)
[BONAP county map]
North America; Mexico; Central America; South America; West Indies; Eurasia; Pacific Islands (New Zealand, Society Islands); Australia
Discussion

Subspecies runcinata replaces subsp. pallida in the southern part of the species range. In New Mexico, it is most morphologically diverse, with plants with subentire leaves densely strigillose recognized in the past as subsp. gypsophila. The distribution and characteristics of these plants should be studied more in relation to other types of populations included in subsp. runcinata. Glabrous plants in the southern portion of the range of subsp. runcinata, especially in New Mexico, adjacent Texas, and Chihuahua, Mexico, have been recognized as var. brevifolia.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Genera 21, species 582 (16 genera, 246 species in the flora).

Onagroideae encompass the main lineage of the family, after the early branching of Ludwigia (R. A. Levin et al. 2003, 2004). This large and diverse lineage is distinguished by the presence of a floral tube beyond the apex of the ovary; sepals deciduous with the floral tube, petals, and stamens; pollen shed in monads (or tetrads in Chylismia sect. Lignothera and all but one species of Epilobium); ovular vascular system exclusively transseptal (R. H. Eyde 1981); ovule archesporium multicellular (H. Tobe and P. H. Raven 1996); and change in base chromosome number from x = 8 in Ludwigia to x = 10 or x = 11 at the base of Onagroideae (Raven 1979; Levin et al. 2003). Molecular work (Levin et al. 2003, 2004) substantially supports the traditional tribal classification (P. A. Munz 1965; Raven 1979, 1988); tribes are recognized to delimit major branches within the phylogeny of Onagroideae, where the branches comprise strongly supported monophyletic groups of one or more genera.

(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 > Oenothera pallida Onagraceae
Sibling taxa
O. pallida subsp. latifolia, O. pallida subsp. pallida, O. pallida subsp. trichocalyx
Subordinate taxa
Synonyms O. albicaulis var. runcinata, Anogra gypsophila, A. leucotricha, A. pallida var. runcinata, A. runcinata, O. albicaulis var. brevifolia, O. albicaulis var. gypsophila, O. pallida subsp. gypsophila, O. pallida var. runcinata, O. runcinata, O. runcinata var. brevifolia, O. runcinata var. gypsophila, O. runcinata var. leucotricha, O. wislizeni
Name authority (Engelmann) Munz & W. M. Klein in N. L. Britton et al.: N. Amer. Fl., ser. 2, 5: 119. (1965) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 41. (2007)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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