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Douglas' tickseed
Scientific Name: Coreopsis douglasii
Family: Asteraceae
Category: Dicot
Growth: Forb/herb
Duration: Annual
Other Names:
Coreopsis douglasii (Douglas' Tickseed)
Coreopsis douglasii, commonly known as Douglas' Tickseed, is a flowering plant belonging to the daisy family (Asteraceae). It is an annual forb/herb characterized by its delicate nature and vibrant yellow blooms.
Considerations for Pets and Children
- Multiple sources found in the provided text indicate that Douglas' Tickseed may not be safe for children, dogs, or cats.
Taxonomy and Nomenclature
- Scientific Name: Coreopsis douglasii (DC.) H.M. Hall
- Common Names: Douglas' Tickseed, Douglas' Coreopsis, Tickseed, Calliopsis (shared with other plants in the Coreopsis genus)
- Family: Asteraceae (Daisy family)
Distribution and Habitat
- Native to California, particularly from Santa Clara.
- Also found in Mexico.
Morphological Characteristics
- Annual plant.
- Delicate, erect annual.
- Features greenish yellow blooms.
- Stems are typically few, measuring 2-10 inches in length.
- Blooms from March to April.
Synonyms and Related Species
- Accepted Name: Coreopsis atkinsoniana Douglas ex Lindl. (H.M. Hall)
- Synonym: Leptosyne douglasii (Note: this is not an active name).
- Related species: Coreopsis californica, Coreopsis floridana, Coreopsis falcata, Coreopsis calliopsidea, Coreopsis delphinifolia, Coreopsis gigenatea, Coreopsis gladiata, Coreopsis leavenworthii, Coreopsis stillmanii, Coreopsis tinctoria Nutt. var. atkinsoniana
Interactions with Other Organisms
- Host plant for some insects, including those reared by Comstock & Henne.
- May be associated with Dr. Douglas Tallamy's research on native plants that support wildlife.
Resources and Further Information
- USDA-NRCS PLANTS Database
- Discover Life