Crowned Beggarticks - Bidens trichosperma
Above: Goldenrod Soldier Beetles on Crowned Beggarticks on shore of Lake Wingra in Wingra Park (8/27/20).
Crowned Beggarticks - Bidens trichosperma - (formerly Bidens coronata)
Crowned Beggarticks is native plant that grows 6"-60" tall. They prefer wet environments like meadows, marshes and shorelines.
Crowned Beggarticks flowers have eight yellow petals and a yellow to brownish button center. On the back of the flower ray there are straight, narrow green bracts with blunt tips. Between the bracts and petals is a layer of yellow sepals.
Blooms August - October
Other names: tickseed-sunflower, northern tickseed-sunflower, tall swamp marigold.
Bidens: derived from Latin bis, "twice," and dens, "tooth." Hence meaning "2-toothed" and referring to the bristles on the achenes.
Above: Crowned Beggarticks leaves and stems.
For more information on the Crowned Beggarticks, visit Wikipedia.
Or, visit the UW-Madison Wisconsin State Herbarium website page about Crowned Beggarticks.
Crowned Beggarticks
Bidens trichosperma
Above: Crowned Beggarticks have green bracts that are straight and narrow with blunt tips. Between the bracts and petals is a layer of yellow sepals.
Above: Crowned Beggarticks on shore of Lake Wingra in Wingra Park in Madison, Wisconsin on September 6, 2020.
Above: Crowned Beggarticks on shore of Lake Wingra in Wingra Park in Madison, Wisconsin on August 29, 2020.
Above: Crowned Beggarticks on shore of Lake Wingra in Wingra Park in Madison, Wisconsin on September 1, 2020.
Above: Crowned Beggarticks on shore of Lake Wingra in Wingra Park in Madison, Wisconsin on September 1, 2019.
Above: Crowned Beggarticks on shore of Lake Wingra in Vilas Park in Madison, Wisconsin on September 6, 2020.
Above: Crowned Beggarticks on shore of Lake Wingra in Vilas Park in Madison, Wisconsin on September 6, 2020.
Above: Beggarticks achenes (seeds) are mostly flat with with 2- bristly awns. NOTE: Above seeds are from Devils Beggarticks (Bidens frondosa).
Above: Crowned Beggarticks specimen collected in Richland County in Sand Prairie State Natural Area on August 1, 2015.
Above: Crowned Beggarticks botanical illustration by Helen Sharp circa 1900.
Above: Crowned Beggarticks botanical illustrations.
