A genus of one North American species allied to Morus (mulberry), Broussonetia, and Cudrania, but easily distinguished from these by its unlobed and untoothed leaves. Male flowers in dense clusters or more rarely in racemes. Female flowers in dense globose clusters developing into a compound fruit, which is pitted and covered with a rind. A bigeneric hybrid with Cudrania has been recorded.
Named in honour of William Maclure, an American geologist.
From the Supplement (Vol. V)
The example of M. pomifera at Kew measures 58 × 7[1/2] ft (1984).