Grow individually with spherical to columnar green shoots and reach heights of up to 1.5 meters. The shoots are often densely covered with fine white tufts of hair, but sometimes they are completely bald. There are four to ten (rarely three) very noticeable ribs. The spike is variable. Thorns may be present or may be missing entirely. The funnel-shaped, large flowers are yellow or yellow with a red center. They appear at the top of the shoots and open during the day.
**This cactus is shown in a 3.25" pot. It will be shipped 'bare-root'.