Keywords: Bidens trichosperma NRCS-1.jpg en Bidens trichosperma Michx Britton 1893 - crowned beggar-ticks crowned tick-seed sunflower syn Bidens coronata L Britton 1995 http //plants usda gov/java/largeImage imageID bico_002_ahp tif Robert H Mohlenbrock USDA-NRCS PLANTS Database / USDA NRCS 1995 Northeast wetland flora Field office guide to plant species Northeast National Technical Center Chester Robert H Mohlenbrock USDA NRCS 1995 Northeast wetland flora Field office guide to plant species Northeast National Technical Center Chester Courtesy of USDA NRCS Wetland Science Institute PD-USGov Uploaded with UploadWizard Bidens trichosperma Photographs by Robert H Mohlenbrock |