| canada | quebec | ceanothus americanus | species | 2 | 0 |
| united states | district of columbia | ceanothus americanus | species | 4 | 0 |
| united states | minnesota | ceanothus americanus var. pitcheri | varietas | 1 | 0 |
| united states | north carolina | ceanothus americanus var. intermedius | varietas | 1 | 0 |
| united states | pennsylvania | ceanothus americanus var. americanus | varietas | 1 | 0 |