Flora of North America species comparison

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Oenothera pallida subsp. pallida

Oenothera pallida subsp. runcinata
Photo is of parent taxon

pale evening-primrose
Photo is of parent taxon
Habit Herbs perennial, usually glabrous, sometimes strigillose, rarely sparsely villous; from a taproot, lateral roots producing adventitious shoots. Herbs perennial, strigillose, sometimes also sparsely villous, or glabrous; from a taproot, lateral roots producing adventitious shoots.
Stems

usually branched throughout.

usually branched throughout.
Leaves

rosette not present at anthesis, 2–6 × 0.3–0.8(–1) cm;

blade lanceolate to linear-lanceolate or oblong, margins usually subentireor remotely denticulate, rarely pinnatifid, usually repand.

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.
Flowers

buds with free tips 0.5–2 mm;

floral tube 20–35 mm;

sepals 12–18 mm;

petals 12–25 mm.

buds with free tips 0–0.2 mm;

floral tube 15–30 mm;

sepals 10–25 mm;

petals 10–30 mm.
Capsules

spreading, contorted to curved.

spreading to reflexed, straight or curved, sometimes contorted.
2n

= 14.

= 14.

Oenothera pallida subsp. pallida

Oenothera pallida subsp. runcinata
Phenology Flowering May–Sep. Flowering (Apr–)May–Sep.
Habitat Sandy soil, dunes, disturbed areas, alkaline soil. Sandy soil, dunes, disturbed areas, alkaline soil, pinyon-juniper woodlands, shrublands with Artemisia, Ericameria, or Prosopis, open ponderosa pine woodlands.
Elevation 1100–2000 m. (3600–6600 ft.) 1100–2400 m. (3600–7900 ft.)
Distribution
from FNA
AZ; CO; ID; NM; NV; OR; UT; WA; WY; BC
[BONAP county map]
from FNA
AZ; CO; NM; TX; UT; Mexico (Chihuahua)
[BONAP county map]
Discussion

The distribution of subsp. pallida centers in the intermountain region from Oregon and Washington east of the mountains, adjacent southern British Columbia, south through southern Idaho, Wyoming, western half of Utah, southern Nevada, to northern Arizona, northwestern New Mexico, and adjacent southwestern Colorado. There are morphological intermediates with subspp. runcinata and trichocalyx. Densely strigillose plants occur within the range of subsp. pallida, especially near the St. Anthony Dunes in Idaho, and have been referred to as var. idahoensis.

Baumannia douglasiana Spach is an illegitimate name that pertains here.

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

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.)
Source FNA vol. 10. FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Anogra > Oenothera pallida Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Anogra > Oenothera pallida
Sibling taxa
O. pallida subsp. latifolia, O. pallida subsp. runcinata, O. pallida subsp. trichocalyx
O. pallida subsp. latifolia, O. pallida subsp. pallida, O. pallida subsp. trichocalyx
Synonyms Anogra leptophylla, O. pallida var. idahoensis, O. pallida var. leptophylla 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 unknown (Engelmann) Munz & W. M. Klein in N. L. Britton et al.: N. Amer. Fl., ser. 2, 5: 119. (1965)
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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