ISBN: | 978-5-5125-1370-5 |
High Quality Content by WIKIPEDIA articles! 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 Desert of California, especially in the vicinity of Death Valley. This is a perennial herb growing a number of thin, erect stems sometimes exceeding a meter in height from a thick caudex.