Echinocereis chisoensis

This uncommon Echinpcereus comes from small area in Big Bend National park, plains near Chisos mountains. As you can see, the geographical name is misspelled in the plant name - proper would be chisosensis, like Opintia name from same area.
This species has distinct easy recognizable look with shaggy spines and lots of fleck in areoles. Flowers are pretty large.