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cosmosflower beggarticks
Scientific Name: Bidens cosmoides
Family: Asteraceae
Category: Dicot
Growth: Vine, Forb/herb
Duration: Perennial
Other Names:
Bidens: A Diverse Genus of Flowering Plants
The genus Bidens belongs to the aster family, Asteraceae, and encompasses a wide variety of flowering plants. They are known by several common names, including Beggar-ticks, Stickseeds, Tickseed Sunflowers, and Bur-Marigolds.
Considerations for Pets
- Some Bidens species, like Bidens bipinnata, produce "ticks" that may cling to animal fur.
Considerations for Children
- Some Bidens species, like Bidens bipinnata, produce "ticks" that may cling to clothing.
Taxonomy and Nomenclature
- Family: Asteraceae
- Several species and synonyms are noted, including:
- Bidens glaucescens Greene (Nodding Beggarticks, Nodding Bur-Marigold)
- Bidens cervicata (Cosmosflower Beggarticks)
- Synonyms for Bidens cervicata:
- Bidens xdimidiata
- Campylotheca cosmoides
- Coreopsis cosmoides
- Bidens cosmoides (A. Gray) Sherff (Cosmos-flower Beggarticks)
- Bidens aurea (Arizona Beggarticks or Bur Marigold)
- Bidens aristosa var. mutica (Swamp Marigold)
- Bidens frondosa (Daisy Beggar-ticks or large-leaved beggarticks)
- Bidens ferulifolia (fern-leaved beggarticks)
- Bidens pilosa (Hairy beggarticks)
- Bidens laevis (Smooth beggarticks)
- Bidens cernua (Nodding Burr-marigold, Nodding Beggartick)
- Synonyms for Cosmos atrosanguineus:
- Bidens atrosanguineus
Distribution and Habitat
- Bidens species are found in various habitats, including damp ground, swamps, and wetlands.
- They are widely distributed, especially in North and South America.
- Bidens aurea (Arizona Beggarticks) is native from Mexico to South America but can be grown as an annual in northern Europe.
Morphological Characteristics
- Flowers often have ray flowers and a central disc.
- The outer flowers in the compound head typically have five petals.
- Some species, like Bidens aristosa var. mutica, have exceptionally large ray flowers.
- Flowers may be lemon yellow tipped with white.
- Flowers are apical forming heads with a diameter of 2-4 cm and with 5-10 ray flowers.
Ecological Role
- Some Bidens species are considered weeds or invasive in certain regions.
Interactions with Other Organisms
- Bidens plants attract bees and other pollinators.
Quirky Facts
- The common name "Devil's Beggar-ticks" is associated with some Bidens species.
- Some species became known as "Taiwanese cosmos" after becoming naturalized in certain areas.