Definition
"Bidens bipinnata" is a specific species within the *Bidens* genus, also known as Spanish needles or fern-leaved beggar-ticks. Think of it as one particular member of the *Bidens* family, with its own unique traits! It's known for its finely divided leaves, giving it a delicate, fern-like appearance. Like other *Bidens* species, it produces seeds that stick to clothing and fur, making it a master of hitchhiking. So, while it might look pretty, be prepared for the prickly aftermath!