| Dare [Mainland] [OBL] [OBM] [OBU] | 445 species | Coastal Plain | Tidewater |
|
| Carteret | 400 species | Coastal Plain | Tidewater |
|
| New Hanover | 370 species | Coastal Plain | |
|
| Brunswick [Mainland] [BHI] | 352 species | Coastal Plain | |
|
| Wake | 346 species | Piedmont | |
|
| Hyde [Mainland] [OB] | 341 species | Coastal Plain | Tidewater |
|
| Mecklenburg | 324 species | Piedmont | |
|
| Guilford | 316 species | Piedmont | |
|
| Onslow | 316 species | Coastal Plain | |
|
| Chatham | 313 species | Piedmont | |
|
| Durham | 309 species | Piedmont | |
|
| Currituck [Mainland] [OB] | 300 species | Coastal Plain | Tidewater |
|
| Wayne | 299 species | Coastal Plain | |
|
| Forsyth | 297 species | Piedmont | |
|
| Buncombe | 292 species | Mountain | |
|
| Henderson | 291 species | Mountain | |
|
| Craven | 289 species | Coastal Plain | Tidewater |
|
| Orange | 273 species | Piedmont | |
|
| Washington | 267 species | Coastal Plain | Tidewater |
|
| Pitt | 266 species | Coastal Plain | |
|
| Transylvania | 265 species | Mountain | |
|
| Moore [Coastal Plain] [Piedmont] | 261 species | | Sandhills |
|
| Catawba | 257 species | Piedmont | |
|
| Beaufort | 257 species | Coastal Plain | |
|
| Pender | 255 species | Coastal Plain | |
|
| Wilkes [Mountain] [Piedmont] | 251 species | | |
|
| Haywood | 244 species | Mountain | |
|
| Halifax | 241 species | Piedmont | |
|
| Cumberland | 240 species | Coastal Plain | Sandhills |
|
| Pamlico | 238 species | Coastal Plain | Tidewater |
|
| Watauga | 237 species | Mountain | |
|
| Rockingham | 236 species | Piedmont | |
|
| Wilson | 230 species | Coastal Plain | |
|
| Tyrrell | 220 species | Coastal Plain | Tidewater |
|
| Gates | 218 species | Coastal Plain | |
|
| Caldwell | 217 species | Piedmont | |
|
| Cabarrus | 213 species | Piedmont | |
|
| Gaston | 213 species | Piedmont | |
|
| Granville | 212 species | Piedmont | |
|
| Jackson | 212 species | Mountain | |
|
| Burke [Mountain] [Piedmont] | 204 species | | |
|
| Randolph | 204 species | Piedmont | |
|
| Alexander | 202 species | Piedmont | |
|
| Anson | 201 species | Piedmont | |
|
| Avery | 199 species | Mountain | |
|
| Iredell | 196 species | Piedmont | |
|
| Swain | 196 species | Mountain | |
|
| Macon | 193 species | Mountain | |
|
| Union | 193 species | Piedmont | |
|
| Camden | 191 species | Coastal Plain | |
|
| Northampton | 190 species | Coastal Plain | |
|
| Nash | 190 species | Piedmont | |
|
| Johnston | 187 species | Coastal Plain | |
|
| Bladen | 187 species | Coastal Plain | |
|
| Alamance | 184 species | Piedmont | |
|
| Mitchell | 184 species | Mountain | |
|
| Pasquotank | 184 species | Coastal Plain | Tidewater |
|
| Madison | 183 species | Mountain | |
|
| Harnett [Coastal Plain] [Piedmont] | 182 species | | |
|
| Ashe | 181 species | Mountain | |
|
| Alleghany | 179 species | Mountain | |
|
| Stokes | 178 species | Piedmont | |
|
| Edgecombe | 176 species | Coastal Plain | |
|
| Rowan | 175 species | Piedmont | |
|
| Warren | 174 species | Piedmont | |
|
| Richmond [Coastal Plain] [Piedmont] | 173 species | Coastal Plain | Sandhills |
|
| Yancey | 169 species | Mountain | |
|
| Stanly | 165 species | Piedmont | |
|
| Yadkin | 164 species | Piedmont | |
|
| Columbus | 162 species | Coastal Plain | |
|
| Surry | 161 species | Piedmont | |
|
| Davidson | 161 species | Piedmont | |
|
| McDowell [Mountain] [Piedmont] | 160 species | | |
|
| Polk [Mountain] [Piedmont] | 160 species | | |
|
| Vance | 159 species | Piedmont | |
|
| Martin | 158 species | Coastal Plain | |
|
| Scotland | 158 species | Coastal Plain | Sandhills |
|
| Rutherford [Mountain] [Piedmont] | 157 species | | |
|
| Franklin | 157 species | Piedmont | |
|
| Cleveland | 156 species | Piedmont | |
|
| Graham | 155 species | Mountain | |
|
| Davie | 151 species | Piedmont | |
|
| Perquimans | 150 species | Coastal Plain | Tidewater |
|
| Lee | 149 species | Piedmont | |
|
| Lincoln | 146 species | Piedmont | |
|
| Person | 144 species | Piedmont | |
|
| Montgomery | 144 species | Piedmont | |
|
| Hoke | 140 species | Coastal Plain | Sandhills |
|
| Caswell | 137 species | Piedmont | |
|
| Jones | 137 species | Coastal Plain | |
|
| Cherokee | 137 species | Mountain | |
|
| Sampson | 134 species | Coastal Plain | |
|
| Bertie | 132 species | Coastal Plain | |
|
| Clay | 130 species | Mountain | |
|
| Robeson | 125 species | Coastal Plain | |
|
| Lenoir | 119 species | Coastal Plain | |
|
| Chowan | 118 species | Coastal Plain | |
|
| Greene | 108 species | Coastal Plain | |
|
| Hertford | 108 species | Coastal Plain | |
|
| Duplin | 106 species | Coastal Plain | |
|
