How is oxalidales related to malpighiales?

Question

How is oxalidales related to malpighiales?

Answer 1

They are in the same scientific division (Magnoliophyta) and class (Magnoliopsida).

Answer 2

Under the International Code of Botanical Nomenclature (ICBN) Oxalidales and Malpighiales belong to the same subclass Rosidae:

"The Phylocode definition includes Crossosomatales, Geraniales, Myrtales, Fabidae (Celastrales, Cucurbitales, Fabales, Fagales, Huaceae, Oxalidales, Malpighiales, Rosales and Zygophyllales), Malvidae (Brassicales, Dipentodontaceae, Gerrardinaceae, Malvales, Sapindales, and Tapisciaceae), "probably" Picramniaceae, and "possibly" Vitaceae" ( cit. )

http://zipcodezoo.com/Key/Plantae/Rosida...

The Rosidae is a very large subclass. It has the most families of any subclass. Unifying characters include showy flowers, perianth parts usually free, and stamens as many as or more than the petals. ( cit. )

http://www.csdl.tamu.edu/FLORA/tfplab/ro...