Bidens pilosa L.
Synonyms
Bidens leucantha, Bidens sundaica, Blackjack, Cobbler's pegs, Common Beggar's-tick, Hairy Beggarticks, Cobbler's Pegs, Farmer's Friend, Pitchforks, Romerillo, Shepherd's Needles, Spanish Needles
ID Characteristics
Life cycle: Annual
Growth Habit: Erect and sprawling
Propagation: Seeds, roots at the nodes along square purplish stems
Leaf Margin: Serrated and sometimes entire
Leaf Hairs: Nearly hairless
Leaf Structure: Lower leaves are simple and ovate. Upper leaves are mostly often pinnate with three to seven lobes.
Leaf Arrangement: Opposite
Root Type: Branching taproot
Flower Color: Five to eight white petals surrounding many yellow disk tubular florets.
Multimedia
Similar Species
- Common Ragweed Ambrosia artemisiifolia
- Beggarsticks spp., Bidens spp.
Herbicidal Control Options
- Preemergence: Selective control option not available
- Post Emergence: Selective control option not available
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