Unlike more fleeting one-day blooms of many barrel cactus, this bloom continues to open in the sun and close when clouds are overhead like this cloudy Friday morning.
For context it's in the front of the bed with the Agave ovatifolia near the garage. (Lower right to the left of the multiple small barrels.)
A small but cheery bloom along the sidewalk in late November.
Hardy to 25F, we rarely get lower than that. If real cold is predicted we might have to dig it up temporarily. Shallow roots make this an easy task for Mr. R.
Four days and counting, I wonder how long it will keep blooming?