| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
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| Poaceae | Panicum amarulum | Southern Seabeach Grass | Coastal dunes and shores, sand-flats, and longleaf pine sandhills. | NJ s. to FL, west to TX and Mexico; West Indies; restricted to the Coastal Plain except for WV (where apparently introduced). | 
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| Poaceae | Panicum amarum | Bitter Seabeach Grass | Coastal dunes and shores. | CT s. to FL, w. to TX and TAB; restricted to the coast. | 
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| Poaceae | Panicum bergii | Berg’s Panic Grass | Ditches and shallow, sporadically flooded depressions in grasslands. | Native of e. South America. Reported for sc. GA (HC), AL (Kartesz 1999), and se. TX. | |
| Poaceae | Panicum bisulcatum | Blackseed Panic Grass | Wet, disturbed, open areas, including old rice impoundments; also historically on ballast. | Native of Asia. Reported introduction in SC, GA, and PA (Kartesz 1999), and as a ballast plant for se. PA (Philadelphia) (Rhoads & Klein 1993, as P. acroanthum Steudel). | |
| Poaceae | Panicum capillare | Old-witch Grass, Tumbleweed, Tickle Grass | Open sandy or stony soil, fields, roadsides, waste places, often weedy in cultivated soil. | E. to c. Canada, s. to FL and TX, Mexico; Bermuda. | 
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| Poaceae | Panicum capillarioides | Longbeak Panic Grass | Grasslands, savannas, especially in sandy soils. | S. TX southwards into n. Mexico (COA, NLE, SLP, TAM). | |
| Poaceae | Panicum coloratum | Klein Grass | Wet pastures. | Native of Africa. | |
| Poaceae | Panicum dichotomiflorum var. bartowense | Bartow Panic Grass | Open, usually wet soils, often emergent in shallow water or on exposed shores. | FL (and unconfirmed reports northward); Bahamas, Cuba, Jamaica. | |
| Poaceae | Panicum dichotomiflorum var. dichotomiflorum | Spreading Panic Grass, Fall Panic Grass | Marshy shores, exposed wet soils, alluvial deposits in floodplain forests, spoil banks, ditches. | E. Canada west to BC, south to FL, TX, and Mexico; also in the Bahamas (Sorrie & LeBlond 1997). | 
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| Poaceae | Panicum dichotomiflorum var. puritanorum | Puritan Panic Grass | Wet sands and peats of seasonally exposed pond and lake shores. | NS, NH, and NY south to DE (Sorrie & LeBlond 2008), VA, NC, and e. SC (Bradley et al. [in prep.]); disjunct in IN and IL. | 
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| Poaceae | Panicum diffusum | West Indian Panic Grass | Disturbed areas. | W. LA and TX ? south into Mexico; West Indies. | |
| Poaceae | Panicum filipes | | Prairies and disturbed areas (eastwards in SC on waste ground near wool-combing mill in Berkeley County, SC, where probably just a waif). | W. LA to AZ, south to southern Mexico. | |
| Poaceae | Panicum flexile | Wiry Panic Grass | Glades and openings over mafic or calcareous rocks, damp sandy meadows, open woodlands. | NY, sw. QC, S. ON, and ND south to n. FL, TX, and Mexico (CHH, COA, DUR, NLE). First reported for SC by Nelson & Kelly (1997). | 
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| Poaceae | Panicum ghiesbreghtii | Ghiesbreght's Panic Grass | Wet thickets. | S. TX south through Mexico and Central America to South America; West Indies. | |
| Poaceae | Panicum hallii | Hall's Panic Grass | Prairies. | | |
| Poaceae | Panicum hillmanii | Hillman's Panic Grass | Disturbed areas. | KS and CO south through OK, TX, and NM to Mexico. | |
| Poaceae | Panicum hirsutum | Hairy Panic Grass, Giant Panic Grass | Thickets, riverbanks. | S. TX, south to tropical America. | |
| Poaceae | Panicum hirticaule var. hirticaule | Mexican Panic Grass | Seasonally moist flats. | TX and OK south and west to CA and Mexico. | |
| Poaceae | Panicum miliaceum ssp. miliaceum | Broomcorn Millet, Proso Millet, Hog Millet | Planted in wildlife food plots, sometimes persistent or self-sowing nearby, also in fields and along railroads and roads. | Native of Eurasia. | 
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| Poaceae | Panicum paludosum | Marsh Panic Grass | In water. | Native of Asia. | |
| Poaceae | Panicum philadelphicum ssp. gattingeri | Gattinger’s Panic Grass | Damp or dry, usually calcareous sandy soils of fields, roadsides, shores, and cultivated ground. | NY, sw. QC, and MN south to NC, TN, GA, AL, and AR. | 
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| Poaceae | Panicum philadelphicum ssp. lithophilum | Flatrock Panic Grass | Soil islands on granitic flatrocks and domes. | Restricted to granite outcrops in NC, SC, and ec. GA. | |
| Poaceae | Panicum philadelphicum ssp. philadelphicum | Woodland Panic Grass | Glades, barrens, desiccated pondshores, riversides, and other rocky or dry sandy soil of open woods and roadsides. | NS west to WI, south to GA and e. TX. | 
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| Poaceae | Panicum psilopodium | | Waif on ore piles. | Native of e. Asia. | |
| Poaceae | Panicum repens | Torpedo Grass | Ditches, roadbanks, disturbed coastal sands, in areas where ship's ballast was deposited. | Native of Europe and Africa. First reported for NC by Leonard (1971b); reported for numerous counties in the GA Coastal Plain (Carter, Baker, & Morris 2009). | |
| Poaceae | Panicum trichoides | Tropical Panic Grass | Disturbed areas. | Native of tropical America. | |
| Poaceae | Panicum virgatum var. cubense | Blunt Panic Grass | Wet to dry sandy pinelands. | Coastal Plain from MA to FL, west to MS; also in MI; West Indies. | 
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| Poaceae | Panicum virgatum var. spissum | Tufted Switchgrass | Gravelly or sandy fresh to brackish shores and swamps. | E. Canada south to PA, MD, DE (Kartesz 1999, 2015) and NC and SC. | 
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| Poaceae | Panicum virgatum var. virgatum | Switchgrass | Dry or wet sandy soils of pinelands, fresh and brackish marshes, tidal swamps, interdune swales and ponds, riverside scour prairies, mafic fens, calcareous fens and spring marshes, rocky river shores and bars, and also frequently planted. | Sw. QC and ND south to FL and TX, west to NV; Bermuda; Central and South America. | 
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