very tall, old Joshua tree, estimated close to 30' tall.
San Bernardino County, California, US
A Joshua tree with a single flower head was observed along park road Rt. 12 between the Quail Springs Picnic Area and the Upper Boy Scout Trailhead. I've lived in the area for 20 years and have never seen a Joshua tree blooming in early December. I walked a 1/4 mile radius loop around the tree and found no other trees blooming.
It was seen while driving on the Racetrack playa road.
The only one I saw during my hike. Calflora only mentions Yucca brevifolia for this area.
One branch with blooming flowers.
The largest Joshua tree I have seen so far. It was probably two feet in diameter.