Senecio barbertonicus is an evergreen, succulent bush up to 6 feet (1.8 m) tall and wide, with a fleshy, cylindrical, finger-like, light green leaves that point upwards along the branches and are crowded toward stem tips, up to 4 inches (10 cm) long and 0.4 inch (1 cm) in diameter. The flowers are yellow, up to 3 inches (7.6 cm) long and 0.4 inch (1 cm) in diameter