Rydberg’s Horkelia

(Horkelia rydbergii)

Rydberg’s Horkelia (Horkelia rydbergii)

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Estimated Native Range
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Summary

Horkelia rydbergii, commonly known as Rydberg’s Horkelia, is an evergreen perennial herb native to the Transverse Ranges of Southern California. It typically grows to a height of 0.4-0.7 feet and can spread to about 2 feet wide. The plant forms a low-growing mat with deeply lobed leaves, and during the summer, it produces delicate flowers that are white with pinkish stamens, adding a subtle charm to garden settings.

Rydberg’s Horkelia is valued for its drought tolerance and ability to thrive in rocky, well-drained soils, making it an excellent choice for rock gardens, alpine collections, and xeriscaping. It is also used as a ground cover in native plant gardens and is appreciated for its low maintenance requirements. While it prefers full sun, it can tolerate partial shade, especially in hotter climates. Gardeners should note that it requires well-drained soil to prevent root rot. This species is not commonly affected by diseases or pests, making it a resilient addition to the garden. However, it is not widely available in the nursery trade, so gardeners may need to seek out specialty native plant nurseries to obtain it.CC BY-SA 4.0

Plant Description

  • Plant Type: Herb
  • Height: 0.5-1 feet
  • Width: 1.5-2 feet
  • Growth Rate: Moderate
  • Flower Color: White
  • Flowering Season: Summer
  • Leaf Retention: Evergreen

Growth Requirements

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

Common Uses

Low Maintenance

Natural Habitat

native to the Transverse Ranges of Southern California

Other Names

Common Names: Parry Horkelia

Scientific Names: , Horkelia parryi, Horkelia rydbergii, Horkelia bolanderi subsp. parryi, Potentilla bolanderi var. parryi, Horkelia bolanderi var. parryi, Potentilla bolanderi var. rydbergii, Horkelia bernardiana, Potentilla rydbergii,

GBIF Accepted Name: Horkelia rydbergii Elmer