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grassland beggarticks
Scientific Name: Bidens micrantha ssp. ctenophylla
Family: Asteraceae
Category: Dicot
Growth: Subshrub, Forb/herb
Duration: Perennial
Other Names:
Grassland Beggarticks (Bidens micrantha)
Bidens micrantha, commonly known as grassland beggarticks, is a flowering plant species belonging to the aster family (Asteraceae).
Taxonomy and Nomenclature
- Scientific Name: Bidens micrantha Gaudich.
- Family: Asteraceae (Aster family)
- Rank: Species
- Synonyms: Several subspecies are recognized, including Bidens micrantha subsp. micrantha and Bidens micrantha ssp. ctenophylla, and Bidens micrantha ssp. kalealaha.
Common Names
- Grassland Beggarticks
- Beggarticks
- Black Jack
- Burr Marigolds
- Cobbler's Pegs
- Spanish Needles
- Stickseeds
- Tickseeds
- Tickseed
- Mauna Loa Beggarticks
- Kalealaha Beggarticks (specifically for B. micrantha subsp. kalealaha)
- Ko'oko'olau
Distribution and Habitat
- Bidens micrantha is endemic to the Hawaiian Islands.
- It is found in natural forests and grasslands.
- It can also be found along roadsides.
Morphological Characteristics and Growth Habits
- Bidens micrantha is described as a subshrub forb/herb.
- It is a perennial plant, meaning it lives for more than two years.
Ecological Role
- It's noted as occurring in "species-rich grasslands".
- The plant is associated with managed grasslands (grazing systems).
- It is described as a weed of both arable lands and grasslands.
Related Species
- Other Bidens species mentioned include:
- Bidens frondosa (beggar-ticks)
- Bidens connata (purplestem beggarticks)
- Bidens mauiensis (Maui beggarticks)
- Bidens menziesii (Mauna Loa beggarticks)
- Bidens pilosa (Hairy Beggarticks)
- Bidens laevis (Smooth Beggarticks)
- Bidens aurea (Arizona beggarticks)
- Bidens glaucescens (nodding beggarticks, nodding bur-marigold)
- Bidens cervicata (Kauaokina?i beggarticks)
Interactions with Other Organisms
- Bidens laevis (Smooth Beggarticks) is noted for being pollinated by a bombyliid fly.
- Bidens pilosa is identified as an allelopathic plant.
Further Information
- Discover Life has a page dedicated to the biology, natural history, ecology, identification, and distribution of Bidens micrantha.
- The National Plant Data Center in Baton Rouge, LA, provides information on vernacular names.