''Artocarpus rigidus'' is a tree species in the

Moraceae Moraceae is a family of flowering plants comprising about 48 genera and over 1100 species, and is commonly known as the mulberry or fig family. Most are widespread in tropical and subtropical regions, less so in temperate climates; however, their ...

that was described by Blume. ''A. rigidus'' is a wild species of the breadfruit/jackfruit genus (''Artocarpus'') and may be referred to as monkey jack. Its Vietnamese name is ''mít nài'' (sometimes ''da xóp''). This 20–25 m trees species can be found in

Indochina Mainland Southeast Asia (historically known as Indochina and the Indochinese Peninsula) is the continental portion of Southeast Asia. It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to th ...

and

Malesia Malesia is a biogeographical region straddling the Equator and the boundaries of the Indomalayan and Australasian realms. It is a phytogeographical floristic region in the Paleotropical kingdom. It was first recognized as a distinct region ...

. The subspecies ''A. rigidus'' subsp. ''asperulus'' (Gagnep.) F.M.Jarrett is accepted; synonyms for the latter are: '' Artocarpus asperulus'' Gagnep. and ''A. calophyllus'' Kurz.http://www.theplantlist.org/tpl1.1/record/kew-2654075 The Plant List

References

Blume, 1826 ''In: Bijdr. 482'' World Plants: Synonymic Checklists of the Vascular Plants of the World
/ref> {{Taxonbar, from=Q15473958 rigidus Flora of Vietnam