Bidens nudata is a species of perennial plant in the family Asteraceae commonly known as the Cape beggar's tick or Baja tickseed. This species is endemic to the Sierra de la Laguna and the Sierra de las Cacachilas of Baja California Sur, Mexico. It is characterized by a mounding habit, pinnate green leaves and large yellow daisy-like flowers. This species has found uses in horticulture as an ornamental, providing a drought-tolerant and durable plant for the garden.

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