One of two organisms submitted from my walk tonight, as both show different details I wanted to capture.
Fairy confident and would guess at P. hallii susp halli. Austin Silty clay soil, degraded remnant along railroad tracks. Infrequent to common along the east and west side of tracks within right of way in the half mile I walked.
On ID:
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