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Family!Scientific Name AuthorReferenceDate
Ulmaceae  Ulmus americana var. alata (Michx.) Spach  
Ulmaceae  Ulmus americana fo. alba (Aiton) FernaldRhodora 47(556): 1331945
Ulmaceae  Ulmus americana var. alba AitonHort. Kew. 1: 3201789
Ulmaceae  Ulmus americana fo. americana    
Ulmaceae  Ulmus americana fo. ascendens A.D. SlavinAmer. Midl. Naturalist 12: 2251931
Ulmaceae  Ulmus americana var. aspera Chapm.Fl. South. U.S. 416–4171860
Ulmaceae  Ulmus americana fo. columnaris RehderJ. Arnold Arbor. 3: 421922
Ulmaceae  Ulmus americana var. floridana (Chapm.) LittlePhytologia 4(5): 3061953
Ulmaceae* Ulmus americana var. glabra Walp.Ann. Bot. Syst. 3: 4241852
Ulmaceae  Ulmus americana fo. intercedens FernaldRhodora 47(556): 1331945
Ulmaceae  Ulmus americana fo. laevior FernaldRhodora 47(556): 1331945
Ulmaceae  Ulmus americana fo. pendula (Aiton) FernaldRhodora 47(556): 1331945
Ulmaceae  Ulmus americana var. pendula AitonHort. Kew. 1: 3201789
Ulmaceae  Ulmus americana var. rubra (Muhl.) AitonHort. Kew. 1: 3191789
Ulmaceae* Ulmus americana var. scabra SpachAnn. Sci. Nat., Bot., sér. 2, 15: 3641841
Ulmaceae  Ulmus americana fo. viridis F. Seym.Amer. Midl. Naturalist 48: 2491952
 
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