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FNA | Family List | FNA Vol. 3 | Moraceae

4. Maclura Nuttall, Gen. N. Amer. Pl. 2: 233. 1818, name conserved - Osage-orange, bois. 1763.


Trees , deciduous; sap milky. Branches with axillary spines. Terminal buds surrounded by bud scales. Leaves alternate; stipules caducous, free. Leaf blade ovate to lanceolate, not leathery, margins entire, never lobed; venation pinnate. Inflorescences: flowers borne outside receptacle; staminate inflorescences loose short racemes; pistillate inflorescences dense heads. Flowers: staminate and pistillate on different plants. Staminate flowers: calyx 4-lobed; stamens 4, inflexed; filaments filiform; anthers introrse, with short connective. Pistillate flowers: sepals 4, 2 outer sepals wider than inner ones; ovary 1, superior, 1-locular; style unbranched, filiform. Syncarps globose, 8-12 cm or more diam.; each achene completely enclosed by its enlarged, fleshy calyx.

Maclura is a monotypic genus endemic to North America.

Lower Taxon


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