Ulmus 'Morton Stalwart' (selling name Commendation™️) is a Morton Arboretum hybrid cultivar arising from a controlled crossing of Accolade with the hybrid Ulmus pumila U. minor (syn. carpinifolia) from eastern Russia. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Plant