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                            | Source: | World Checklist of Selected Plant Families (2010), copyright © The Board of Trustees of the Royal Botanic Gardens, Kew. 
 
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                            | Name: | Quercus occidentalis f. heterocarpa Globa-Mikhailenki, nom. illeg. |  
                            | Nomencl. ref.: | Byull. Glavn. Bot. Sada 80: 29. 1971 |  
                            | Nomencl. status: | nom. illeg. |  
                            | Rank: | Forma |  
                            | Status: | SYNONYM |  
				| Synonym of: | Quercus suber L. |  
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