This is the Osage Orange tree, scientific name Maclura pomifera.    From Wordnik.com.  [Urban Wildlife Watch: Osage Orange Trees] Reference

Maclura pomifera is definitely native to the Americas, although "bois d'arc" appears to be a fairly widespread local name.    From Wordnik.com.  [Urban Wildlife Watch: Osage Orange Trees] Reference

While back in Arkansas recently, I saw one of these “ghosts”, the osage orange Maclura pomifera shown in the picture below.    From Wordnik.com.  [A Ghost of Evolution] Reference

Armathocereus humilis, Stenocereus griseus, Acanthocereus pentagonus y Pilosocereus colombianus; and woody species of bushes and trees such as Pithecellobium bogotense, Capparis odoratissima, Bulnesia carrapo, Maclura tinctoria, Fagara pterota, Prakinsonia aculeta, Prosopis juliflora, and Acacia farnesiana among others.    From Wordnik.com.  [Magdalena Valley dry forests] Reference

A Web of the botanical name -- Maclura pomifer -- and thornless and fruitless will yield the varieties 'Wichita,' 'White Shield' and 'Park.'.    From Wordnik.com. Reference

His word list is so complete that a gardener meeting an unfamiliar botanical name (say, Maclura pomifera) can readily learn that it refers to a species of Osage orange (named after the American geologist William Maclure) that bears fruit as well as flowers.    From Wordnik.com.  [VERBATIM: The Language Quarterly Vol V No 3] Reference

Maclura aurantiaca, 76.    From Wordnik.com.  [Seasoning of Wood] Reference

Maclura aurantiaca.    From Wordnik.com.  [Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural. Being also a Medical Botany of the Confederate States; with Practical Information on the Useful Properties of the Trees, Plants, and Shrubs] Reference

Maclura auruntiaca, 101.    From Wordnik.com.  [Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural. Being also a Medical Botany of the Confederate States; with Practical Information on the Useful Properties of the Trees, Plants, and Shrubs] Reference

Cordia alliodora, Enterolobium contortisiliquum, Gallesia integrifolia, Guazuma ulmifolia, Maclura tinctoria, Spondias mombin, and Triplaris boliviana.    From Wordnik.com.  [Beni savanna] Reference

Some of the principal endemic species of vegetation specific to this ecoregion are: Ceiba trichistandra, Prosopis juliflora, Cordia lutea, Eriotheca ruizii, Maclura tinctoria, Pithecellobium exelsum, Bursera graveolens, Pradosia montana, Croton riviniaefolius, Macranthisiphon longiflorus, Amyris pinnata, Erythroxylum patens, Zanthoxylum tumbezanum, Prunus subcorymbosa and Capparis angulata.    From Wordnik.com.  [Ecuadorian dry forests] Reference