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Chuck Sexton   cc-by-nc-4.0

Ostrya knowltonii (Canyon Ironwood) is a species of tree in the family Betulaceae. They are listed as critically endangered by IUCN. They are native to The Contiguous United States, Western North America, United States, and China.

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EOL has data for 15 attributes, including:

Known occurrences, collected specimens and observations of Canyon ironwood from the Global Biodiversity Information Facility   GBIF provides free and open access to biodiversity data. View this species on GBIF