Tumbleweeds are ubiquitous in the high grasslands of Rita Blanca, but most plants were still relatively small (3rd image). The abundance of the species can be gauged by the 15-ft-tall piles of dried tumbleweeds blown up against this windrow of Russian Olive in this particular unit of the National Grassland.
Keyed out in a couple of sources.
This very old (and dying) windrow of Russian Olive has been here forever, it seems. I recall coming up to the Panhandle to look for Long-eared Owls at this site back in the early 1980s. The owls roost in the Russian Olive trees. In my June visit, the windrow was half-buried in Tumbleweeds from the previous year's crop.
The moth on the flower is apparently Schinia simplex, a rare Texas record. See,
https://www.inaturalist.org/observations/107319703