Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Oenothera fruticosa subsp. tetragona

Onagraceae subfam. onagroideae
Photo is of parent taxon

narrowleaf evening primrose
Habit Herbs mostly glandular puberulent or glabrous, sometimes strigillose or villous on stems; from fibrous rootstock.
Leaves

in a basal rosette and cauline, basal 3–12 × 0.5–3 cm, petiole 1–3 cm, blade oblanceolate to obovate, margins dentate to remotely denticulate;

cauline 2–6(–11) × (0.5–)1–2(–5) cm, sometimes glaucous;

petiole 0.1–2(–6) cm;

blade narrowly elliptic to broadly ovate, margins dentate to remotely denticulate.

stipules present or absent.
Flowers

buds with free tips (3–)4–8(–13) mm, connivent to spreading;

floral tube 5–20 mm;

sepals 8–22 mm;

petals (8–)15–20(–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

oblong to oblong-ellipsoid, widest at middle, (5–)10–17(–20) × (2–)3–4(–6) mm, 4-winged, sometimes 4-angled, stipe 0.1–3(–7) mm;

sessile.

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

2n

= 28.

Oenothera fruticosa subsp. tetragona

Onagraceae subfam. onagroideae
Phenology Flowering Apr–Aug(–Sep).
Habitat Open meadows, stream margins, edges of woods, open woods.
Elevation (100–)300–1700 m. ((300–)1000–5600 ft.)
Distribution
from FNA
AL; CT; DC; DE; GA; IL; IN; KY; LA; MA; MD; ME; MI; MO; NC; NH; NY; OH; PA; RI; SC; TN; VA; WV; NS; ON; QC
North America; Mexico; Central America; South America; West Indies; Eurasia; Pacific Islands (New Zealand, Society Islands); Australia
Discussion

Oenothera serotina Sweet (1826) is a homonym, not Lehmann (1826), while Kneiffia floribunda Spach (1835) is an illegitimate substitution based on O. tetragona, and both names pertain here.

(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. Kneiffia > Oenothera fruticosa Onagraceae
Sibling taxa
O. fruticosa subsp. fruticosa
Subordinate taxa
Synonyms O. tetragona, Kneiffia fraseri, K. fruticosa var. differta, K. glauca, K. latifolia, K. serotina, K. tetragona, K. tetragona var. hybrida, O. ambigua, O. canadensis, O. fraseri, O. fruticosa var. ambigua, O. fruticosa var. differta, O. fruticosa var. fraseri, O. fruticosa subsp. glauca, O. fruticosa var. glauca, O. fruticosa var. incana, O. fruticosa var. maculata, O. glauca, O. glauca var. fraseri, O. hybrida, O. hybrida var. ambigua, O. incana, O. serotina, O. tetragona var. fraseri, O. tetragona subsp. glauca, O. tetragona var. hybrida, O. tetragona var. latifolia
Name authority (Roth) W. L. Wagner: PhytoKeys 34: 16. (2014) 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).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America

The species comparison tool is brought to you by:
Northwest Wildflowers