Ostrya virginiana (Eastern Hophornbeam) - Detailed facts on habitat and life history, including native range, supporting soils, associated forest cover, reproduction, and growth. - http://www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/ostrya/virginiana.htm
Ostrya knowltonii - Information on distribution and occurrence, its value and use, characteristics, and fire ecology. - http://www.fs.fed.us/database/feis/plants/tree/ostkno/
Ostrya virginiana - Information on distribution and occurrence, value and use, characteristics, and fire ecology of Eastern Hophornbeam. - http://www.fs.fed.us/database/feis/plants/tree/ostvir/