Ptelea trifoliata Linnaeus var. trifoliata . Common Wafer-ash. Phen: Apr-Jun; Jun-Aug. Hab: Rocky hillsides, glades, and barrens, especially over calcareous or mafic rocks, prairies, prairie woodlands. Dist: NY west to WI, south to FL and TX.

Origin/Endemic status: Native

Synonymy: = F, G, Il, NY; > Ptelea microcarpa Small – S, S13; > Ptelea serrata Small – S, S13; < Ptelea trifoliata L. – Ar, Fl4, Mi, Pa, RAB, Tat, Tn, Va, WH3; < Ptelea trifoliata L. ssp. trifoliata – GrPl, K4; < Ptelea trifoliata L. ssp. trifoliata var. trifoliata – C, K1, K3, NE, Tx, Bailey (1962), Skornia, Yang, & Applequist (2015); > Ptelea trifoliata L. var. trifoliata – S, S13

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACU (taxonomic split from wetland indicator species)
• Eastern Mountains and Piedmont: FAC (taxonomic split from wetland indicator species)
• Great Plains: FAC (taxonomic split from wetland indicator species)
• Midwest: FACU (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FACU (taxonomic split from wetland indicator species)

Heliophily ?: 6