Oenothera californica, California Suncup
Scientific Name: Oenothera californica
Common Name: California Suncup
Also Called: California Evening Primrose, California Eveningprimrose and California Evening-primrose
Family: Onagraceae, Evening Primrose Family
Synonyms: (Oenothera deltoides var. arizonica)
Duration: Annual, perennial;
Size: Up to 30 inches, usually much shorter.
Growth Form: Forb/herb; new plants are rosetted, stems decumbent or ascending, new shoots from lateral roots.
Leaves: Green; upper or cauline stems with lanceolate, entire to pinnately lobed.
Flower Color: White; large flowers from upper leaf axils, flower buds nodding, fruit cylindric, straight or curved.
Flowering Season: February to May.
Elevation: 500 to 2,500 feet; below 7,500 in California.
Habitat Preferences: Open disturbed areas, sandy or gravelly areas; in California in dunes, desert scrub to pinyon-juniper or pines.
Recorded Range: Tufted Evening Primrose is found in the southwest United States in AZ, CA, NV, UT and in northern Baja California and northwest Mexico.
In Arizona it is occurs in central Arizona in Maricopa County and in the northwest in Mohave County.
North America & US County Distribution Map for Oenothera californica.
U.S. Weed Information: No information available.
Invasive/Noxious Weed Information: No information available.
Wetland Indicator: No information available.
Threatened/Endangered Information: No information available.
Genus Information: Over 80 species in Oenothera throughout all of North America. 24 or so species in Arizona and California, 28 or so species in New Mexico and 47 or so species in Texas.
The Plant List includes 706 scientific plant names of species rank for the genus Oenothera. Of these 150 are accepted species names.
There are 3 sub-species in Oenothera californica:
Oenothera californica subsp. avita, California Evening Primrose (AZ, CA, NV, UT);
Oenothera californica subsp. californica, California Evening Primrose (CA);
Oenothera californica subsp. eurekensis, Eureka Dunes Evening Primrose (CA);
Comments: Also see in Southwest Desert Flora: Tufted Evening Primrose, Oenothera caespitosa; Crownleaf Evening Primrose, Oenothera coronopifolia; Velvetweed, Oenothera curtiflora; Dune Evening Primrose, Oenothera deltoides; Hooker's Evening Primrose, Oenothera elata; Large Yellow Desert Primrose, Oenothera primiveris; Rose Evening Primrose, Oenothera rosea; Mexican Evening Primrose, Oenothera speciosa and Scarlet Beeblossom, Oenothera suffrutescens.