Several observers and found several such plants on this site, growing in gravel roads and gravel trails. It's certainly Townsendia and it's certainly not excapa, so is being designated texensis as the sole alternative, as far as anybody knows.
FONA description: www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250067782
Discussed here: www.inaturalist.org/observations/27572061