''Hymenopappus tenuifolius'', the Chalk Hill hymenopappus, is a North American species of flowering plant in the

daisy family The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

. It grows in the central and southeastern United States, primarily on the

Great Plains The Great Plains (french: Grandes Plaines), sometimes simply "the Plains", is a broad expanse of flatland in North America. It is located west of the Mississippi River and east of the Rocky Mountains, much of it covered in prairie, steppe, an ...

from Texas and New Mexico north as far as South Dakota. ''Hymenopappus tenuifolius'' is a biennial herb up to 150 cm (5 feet) tall. It produces 20-200 flower heads per stem, each head with 25–50 white disc flowers but no ray flowers. Pursh, Frederick Traugott 1813. Flora Americae Septentrionalis 2: 742. 1813
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Photo of herbarium specimen at Missouri Botanical Garden, collected in 1839 somewhere on the Great PlainsLady Bird Johnson Wildflower Center, University of Texas
tenuifolius Endemic flora of the United States Flora of the Great Plains (North America) Flora of the United States Plants described in 1788 Taxa named by Frederick Traugott Pursh Flora without expected TNC conservation status {{Asteroideae-stub