The Oxalidales is an order of 6 families with around 1300 species of dicotyledenous flowering herbs, shrubs and trees taking its name from the Oxalidaceae (sorrels, 800 species).
Members of the Oxalidales are cultivated for their timber or fruit e.g. the tropical tree Averrhoa carambola (star fruit.)
The genus Oxalis includes stem succulents and tuberous species, some of which are edible. The non-succulent Oxalis corniculata (creeping wood sorrel), with small yellow flowers, will be familiar to many cactus collectors as an invasive weed.
The Australian genus Cephalotus (pitcher plants) may be of interest to collectors of carnivorous plants.