cutleaf evening primrose
Scientific NameOenothera laciniata
Other Common Names:
Synonyms (former Scientific Names):
Usually a biennial or a winter annual, but may rarely occur as a summer annual. Cutleaf eveningprimrose has leaves with deeply toothed margins and produces many showy yellow or red flowers. This weed is primarily a weed of landscapes, nurseries, some agronomic crops, and occasionally turfgrass and lawns. Cutleaf eveningprimrose occurs throughout the southern and eastern United States.
Cotyledons are egg- or arrowhead-shaped and occur on petioles. Leaves initially develop as a basal rosette. Young leaves have margins that are untoothed (entire), but subsequent leaves have toothed margins. Upper leaf surfaces of young leaves are usually hairy and lower leaf surfaces are without hairs. Mature leaves may have hairs on the upper leaf surfaces but are without hairs below. Leaves are lanceolate in outline, are relatively narrow, and have deeply toothed margins. Leaves have a distinctive white midvein.
Erect or prostrate plants with lanceolate leaves that have toothed margins, red stems, and yellow or red flowers. Cutleaf eveningprimrose is very similar in appearance to Common Eveningprimrose (Oenothera biennis), but common eveningprimrose has untoothed margins and usually grows much more erect than cutleaf eveningprimrose.
Flower Seed Head
The flowers have 4 regular parts and are up to 3 cm wide. They are pale yellow sometimes pink. Flowers are born directly from the main stem (sessile). Blooms first appear in late spring and continue into early fall.
A capsule that is approximately 3/4 to 1 1/2 inches long and often curved. Many seed are arranged in rows within the capsule.
Cutleaf evening primrose can be found in almost all of North America, east of the Rocky Mountains and some areas west of the Rockies.
prostrate and nonwoody
Thorns or Spines
Approximate Flower Diameter
Dominant Flower Color
Stem Cross Section
round or oval