Solanum macranthum so·la·num·macranthum uncommon noun 1. South American shrub or small tree widely cultivated in the tropics; not a true potato Synonymspotato treeBrazilian potato treeSolanum wrightiiSolanum macranthum Related words Broader terms shrub Parts Solanum WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.