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 macrocarpa subsp. fremontii
Photo is of parent taxon

Fremont's evening primrose
Habit Herbs densely strigillose.
Stems

numerous, with numerous short secondary branches, 3–30 cm.
Leaves

gray, (2.8–)3.7–11 × 0.1–0.6(–1.5) cm;

blade linear to narrowly elliptic to narrowly elliptic-lanceolate or narrowly oblanceolate, margins flat, entire or inconspicuously denticulate, apex acute.
Flowers

buds with unequal free tips 1–2(–5) mm;

floral tube (21–)35–65(–80) mm;

sepals (20–)25–30(–37) mm;

petals (17–)25–33(–37) mm;

filaments 13–18 mm, anthers 10–12 mm;

style (45–)55–80(–98) mm.
Capsules

ellipsoid to narrowly ellipsoid, often twisted, wings 2–5(–9) mm wide, body 13–30(–65) × 2–6 mm.
2n

= 14.

Oenothera macrocarpa subsp. fremontii
Phenology Flowering May–Aug.
Habitat Rocky soil derived from fine-textured sandstone, shale or chalk on rocky hillsides, bluffs, badlands.
Elevation 400–900 m. (1300–3000 ft.)
Distribution
from FNA
KS; NE
[BONAP county map]
Discussion

Subspecies fremontii occurs from Franklin and Webster counties in south-central Nebraska south into Kansas to Ellsworth, Hodgeman, and Logan counties; also with disjunct locations in Antelope and Cedar counties in northeastern Nebraska, and Barber County in south-central Kansas. Some specimens from the eastern part of the range, where subsp. fremontii and subsp. macrocarpa are sympatric, appear intermediate between the two subspecies and are difficult to assign.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Megapterium > Oenothera macrocarpa
Sibling taxa
O. macrocarpa subsp. incana, O. macrocarpa subsp. macrocarpa, O. macrocarpa subsp. oklahomensis
Synonyms O. fremontii, Megapterium fremontii
Name authority (S. Watson) W. L. Wagner: Ann. Missouri Bot. Gard. 70: 194. (1983)
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