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Oenothera flava (A. Nelson) Garrett ssp. taraxacoides (Wooton & Standl.) W.L. Wagner

Yellow evening primrose

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassRosidaeRoses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
OrderMyrtalesIncludes myrtles, leadwoods, loosestrifes, pomegranates, evening primroses, many others
FamilyOnagraceaeWillowherb/evening primrose family
GenusOenotheraDerivation uncertain: 1. Greek ονος θηρας (onos theras), or “donkey catcher.” 2. Or οινος θηρας (oinos theras), “wine seeker.” 3. Or Latin oenothera, “a plant whose juices may cause sleep”
SpeciesflavaLatin for “yellow”
ssp.taraxacoidesMeans “like a dandelion”

About plant names...

This is the "dandelion subspecies" of yellow evening primose, so-called for the resemblance of its foliage to dandelion leaves.

Identification: You know you're talking about an unusual plant when you can't find much of anything about it online. Plants have a rosette of basal leaves reminiscent of dandelion leaves. Flowers emerge directly from the base on red stems. Flowers are yellow, about 1-1½" (2.5-3.8 cm) around, with four petals. Plants and flowers together are only about 8" (20 cm) tall.

Online References:

The USDA Plants Database

SEINet—the Southwest Environmental Information Network (Oenothera flava)

Northern Arizona Flora

The Lady Bird Johnson Wildflower Center (Oenothera flava)

Wildflowers, Ferns & Trees of Colorado, New Mexico, Arizona, and Utah (Oenothera flava subspecies flava)

Lavauxia taraxacoides Wooton & Standl.

Oenothera taraxacoides (Wooton & Standl.) Munz


Oenothera flava ssp. taraxacoides description by Thomas H. Kent, last updated 25 May 2020.

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Oenothera flava (yellow evening primrose)

5/15/2010 · Garden in the Woods, Framingham, Mass­a­chu­setts
≈ 21 × 14" (52 × 34 cm)


About this map...