Young stems of lava cactus (Brachycereus nesioticus) is endemic to Galapagos. It is the smallest of the Galapagos cacti. It is usually one of the first plants to colonise a fresh lava flow. It consists of number of short spiny stems up to 60 cm in height. Young stems are fresh yellow-green, turning grey to black with age. This cactus was growing on barren lava, Punta Espinosa, Fernandina Island, Galapagos, Ecuador, May 2007.