The Order Oxalidales contains 6 families with around 1300 species of dicotyledenous flowering herbs, shrubs and trees taking its name from the Oxalidaceae (sorrels, 800 species). The genus Oxalis includes a few 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.
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