From Genovesa.
The lava cactus (Brachycereus nesioticus) is one of the first plants to colonize the bare lava, enduring the harsh environment of the islands’ arid zone. One of several cacti endemic to the Galápagos, Brachycereus does not grow very large, appearing in clumps along lava fields. The new growth is yellow, and turns greyish as it ages.
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