pineland squarestem inflorescence with clear anthers view

flower plant wildflower green leaf herb nature blossom petal meadow insect grass branch pineland squarestem inflorescence inflorescences clear anthers view melanthera nivea asteraceae family common snow tropical grows americas coarse leaves simple shape variable lower hastate-lobed upper oblong base cuneate margin toothed apex acute obtuse head white disk florets ray absent black achenes pubescent apical bristles observed maya biosphere reserve mbr petén guatemala inflorescence family squarestem americas bristles guatemala