| Apiaceae | Heracleum mantegazzianum | Giant Hogweed | Disturbed areas, pastures. | Native of the Caucasus Mountains. Introduced and well-established in ne. North America; recently found in NC (Poindexter, Weakley, & Denslow 2011). Recently reported as persistent and spreading from plantings in Clarke County, VA (J. Metzgar, pers. comm., 2018); also apparently documented but perhaps not readily established around Baltimore, MD (. | 
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| Apiaceae | Heracleum maximum | Masterwort, Cow-parsnip, American Hogweed | Northern hardwood forests, roadbanks, meadows, forest openings, grassy balds, rich floodplain forests. | NL (Labrador) west to AK, south to DE, PA, OH, IN, IL, MO, KS, NM, AZ, CA, and in the Appalachians south to w. NC, e. TN, and n. GA; also in e. Siberia. | 
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