slender greenthread, Thelesperma simplicifolium

Everyone seems to agree that slender greenthread grows in Texas. But beyond the Lone Star is the question. Flora of North America says the species is used in roadside plantings and may occur as a waif, for example in California. FDA simply says slender greenthread occurs in New Mexico and Arizona. It seems the roadside planters may have confused things. And maybe they helped with today's image, since it was from a nicely floriferous roadside. Travis Co TX, 4/17/22. Aster family, Asteraceae.