Only about 4" tall with the red "peppers". This was a solitary specimen alongside the trail. I saw no other cacti that looked similar to this one. The white spines offer a fuzzy look. The fruit appear like small, red Chile's. One observer iof the photo ndicated the fruit were sweet.
After I went to the doctor this AM for a check-up, I ate lunch at this park in Arlington -- spotted a few critters too!
Attracted to light sheet.
This observation at BugGuide:
https://bugguide.net/node/view/1944361
Curacaviensis/Corallinus ??