California Suncup

(Eulobus californicus)

California Suncup (Eulobus californicus)

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Estimated Native Range
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Summary

Eulobus californicus, commonly known as California Suncup, is an annual herb native to open grasslands and desert edges in the Southwestern US, California, and Northwestern Mexico. It forms a basal rosette of leaves from which a slender, erect stem arises, potentially reaching over 1.5 meters in height. The plant is known for its bright yellow flowers, each consisting of four petals that may feature red speckles near their bases. The sepals are greenish, smaller than the petals, and reflexed back against the pedicel. After flowering, it produces a cylindrical capsule fruit that measures 4 to 10 centimeters in length. The flowering season is typically in the spring and early summer, and the flowers are moderately showy, attracting pollinators.

California Suncup is valued for its drought tolerance and vibrant yellow flowers, which can add a splash of color to rock gardens, wildflower meadows, and xeriscaped areas. It is well-suited to cultivation in regions with dry climates and is often used to naturalize areas or as a part of a low-water garden. This plant thrives in full sun and requires low to medium amounts of water, preferring well-drained soils. It is relatively low-maintenance but may self-seed prolifically under ideal conditions. Gardeners should be aware that it can become weedy if not managed properly.CC BY-SA 4.0

Plant Description

  • Plant Type: Shrub
  • Height: 3-4.5 feet
  • Width: 3-4 feet
  • Growth Rate: Moderate
  • Flower Color: Yellow
  • Flowering Season: Winter, Spring, Summer
  • Leaf Retention: Evergreen

Growth Requirements

  • Sun: Full Sun
  • Water: Low, Medium
  • Drainage: Fast

Common Uses

Bee Garden, Butterfly Garden, Drought Tolerant, Low Maintenance

Natural Habitat

native to open grasslands and desert edges in the Southwestern US, California, and Northwestern Mexico

Other Names

Common Names:

Scientific Names: , Camissonia californica, Eulobus californicus, Oenothera crassifolia var. leptocarpa, Oenothera eulobus,

GBIF Accepted Name: Eulobus californicus Nutt.