Redwhisker clammyweed occurs across much of Canada, USA, and northern Mexico. This sticky annual (rarely perennial) species is found in habitats with disturbance, like roadsides, riverbanks, and grasslands.
Polanisia dodecandra has three recognized subspecies. Subspecies dodecandra is widespread across the range of the species, while subspecies trachysperma is more common in the west. The third subspecies, Polanisia dodecandra subsp. riograndensis is native to the Rio Grande region of Texas and adjacent parts of Mexico. The first two subspecies are sometimes considered native & non-native, depending on the scope of the area one is considering. For example, plants from one of the subspecies may occur natively in a state, but in the same state plants from the other subspecies may have been introduced–yet both are native to North America.
Wikipedia has an explanation of the name of Polanisia dodecandra,
[Polanisia] derives from the fact that the plant has numerous stamens of unequal lengths (from Greek polys, “many”, and anisos, “unequal”). The name of the species, dodecandra means “having 12 stamens”]