- Ostrya, genus Ostrya - deciduous monoecious trees of Europe and Asia and America; sometimes placed in subfamily or family Carpinaceae
--1 is a kind of hamamelid dicot genus
--1 is a member of Betulaceae, family Betulaceae, birch family
--1 has members:hop hornbeam; Old World hop hornbeam, Ostrya carpinifolia; Eastern hop hornbeam, ironwood, ironwood tree, Ostrya virginiana