David Hunt, a specialist on this taxonomic family, remarked that Curt Backeberg's sloppy work on this family "left a trail of nomenclatural chaos that will probably vex" this family's "taxonomists for centuries." This family uniquely does not contain its type genus. Genetic studies of this family led to the creation of Leuenbergeria and another genus since the former broad definition of Pereskia was polyphyletic. Rhipsalis baccifera, native to Africa and Sri Lanka, is this family's only Old World member. Plants in this family have highly reduced knoblike branches called areoles. (10[1])A non-tree (10[1])member of this family often sees elf owls nest in holes made by Gila woodpeckers. (10[2])Most members of this family have enlarged stems with ribs (10[1])that can expand (10[1])to absorb (10[1])a large quantity of water. (10[1])For 10 points, name these spiny succulents such as saguaros. ■END■ (10[1])