Euphorbia flanaganii 'Cristata' is a succulent plant eider with a crested caudex and normal cylindrical branches or with crested branches and a normal swollen, partially underground stem. The form with crested branches is more common in cultivation. It grows up to 6 inches (15 cm) tall and up to 12 inches (30 cm) wide and forms a clump of fan-shaped branches resembling a wavy emerald green coral.
