The specific epithet ligusticifolia for this Clematis means that the plant has leaves like Ligusticum or lovage. I used the name Levisticum for lovage...
The villain in this show is the grass Enneapogon cenchroides or soft feather pappus grass. There are many invasive exotic grasses that have changed...
The common name of Calylophus hartwegii is Sundrops. That’s considerably easier to say and I suspect that the common name covers a few species...