Artocarpus rigidus is a tree species in the Moraceae 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 mÃÂt nài (sometimes da xóp).
This 20âÂÂ25 m trees species can be found in Indochina and Malesia. The subspecies A. rigidus subsp. asperulus <small>(Gagnep.) F.M.Jarrett</small> is accepted; synonyms for the latter are: ' <small>Gagnep.</small> and A. calophyllus <small>Kurz</small>.