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 sect. Contortae
Habit Herbs perennial, acaulescent; from a thick, fleshy taproot.
Leaves

in a basal rosette, 2.6–4(–6.2) cm;

blade margins pinnately lobed, lateral lobes often greatly reduced.
Inflorescences

solitary flowers in axils of leaves.
Flowers

opening near sunset, with strong, sweet scent;

buds erect, quadrangular, without free tips;

floral tube 27–45(–55) mm;

sepals separating individually or in pairs;

petals intensely yellow, fading deep salmon red, obcordate;

stigma deeply divided into 4 linear lobes.
Capsules

moderately thin and flexible, lanceoloid, often contorted and twisted, 4-angled, gradually tapering to a long, slender, sterile apex, dehiscent 2/3–3/4 their length;

sessile.
Seeds

numerous, in 1 row per locule, often forming 2 rows near base of capsule, obovoid, surface coarsely rugose, with turgid and collapsed papillae.
2n

= 14.

Oenothera sect. Contortae
Distribution
w United States
Discussion

Species 1.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera
Subordinate taxa
Name authority W. L. Wagner: Ann. Missouri Bot. Gard. 73: 478. (1986)
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