''Hymenopappus carrizoanus'', the Carrizo Sands woollywhite, 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 has been found only in Texas, on the Carrizo Sands of the central part of the state. ''Hymenopappus carrizoanus'' is a biennial herb up to 150 cm (5 feet) tall. It produces 45–60 flower heads per stem, each head with 20–40 white disc flowers but no ray flowers.Turner, Billie Lee. 1989. Phytologia 67(4): 293–296
diagnosis in Latin, description and commentary in English, distribution map on page 295

References

carrizoanus Endemic flora of Texas Plants described in 1989 Flora without expected TNC conservation status {{Asteroideae-stub