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Texas sundrops

Scientific Name: Calylophus tubicula

Family: Onagraceae

Category: Dicot

Growth: Subshrub, Forb/herb

Duration: Perennial

Other Names:

       

Berlandier's Sundrops (Calylophus berlandieri)

Also known as Square-bud Primrose, Texas Primrose, Shrubby Primrose, and Texas Sundrop, Calylophus berlandieri is a showy, low-growing perennial native to Texas and other states.

Considerations for Pets

  • This plant is palatable for livestock, suggesting it might be attractive to grazing animals, including some pets.

Taxonomy and Nomenclature

  • Scientific Name: Calylophus berlandieri
  • Common Names: Berlandier's Sundrops, Square-bud Primrose, Sundrops, Texas Primrose, Texas Sundrop, Shrubby Primrose, Yellow Evening Primrose, Buttercup, Yellow Sundrop, Square Bed Primrose
  • Synonyms: Calylophus drummondianus var. berlandieri, Calylophus tubicula (A. Gray) P.H. Raven
  • Related Species: Calylophus drummondianusi, Calylophus lavandulifolius (Torr. (Small) Towner, Calylophus tubicula (Gray) Raven (Texas Sundrops), Oenothera tubicula subsp. tubicula

Distribution and Habitat

  • Native to Texas and other states, ranging from Kansas to New Mexico, Oklahoma, and the Gulf States to Alabama.
  • Found in old fields and on hillsides of the Edwards Plateau and the South Texas Plains.
  • Predominantly grows on sandy or rocky soil.

Morphological Characteristics and Growth Habits

  • Perennial plant with an extended blooming period.
  • Grows to a height of 6 inches to 2 feet.
  • Can spread up to 3 feet.
  • Showy low-growing plant.

Cultivation

  • Thrives in full sun and partial shade.
  • Does best with good drainage.
  • Tolerates a good amount of heat.

Interactions with Other Organisms

  • Halfshrub sundrop is palatable for livestock.

Further Information

  • Plant Delights Nursery offers Calylophus Texas Sun for sale.
  • Texas Parks and Wildlife provides information on alternate names and uses.
  • Discover Life has a page about the biology, natural history, ecology, identification, and distribution of Calylophus tubicula.