Anulocaulis annulatus is a species of flowering plant in the four o'clock family known by the common name valley ringstem. It is endemic to the Mojave...

America. Anulocaulis annulatus - valley ringstem Anulocaulis eriosolenus - Big Bend ringstem Anulocaulis gypsogenus - gypsum ringstem Anulocaulis leiosolenus...