Bidens alba (Spanish needles)

4/12/2015 · Shark Valley, Everglades National Park, Florida · ≈ 6 × 6″ (15 × 16 cm)

4/10/2015 · Big Cypress National Preserve Visitor Center, Florida · ≈ 7 × 10″ (16 × 25 cm)

4/10/2015 · Big Cypress National Preserve Visitor Center, Florida · ≈ 5 × 6″ (12 × 16 cm)

Kingdom	Plantae	Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin)
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Asteridae	A large class that encompasses asters
Order	Asterales	Flowering plants with a central disk flower and surrounding petals, like daisies
Family	Asteraceae	The aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers
Genus	Bidens	From Latin bis, “twice,” and dens, “tooth,” for the pair of bristles on the achenes
Species	alba	White