| 1 | Native | Northern America | Eastern Canada | Canada | Nova Scotia | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Eastern Canada | Canada | Ontario | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Eastern Canada | Canada | Québec | s.w. | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Illinois | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Iowa | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Kansas | e. | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Minnesota | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Missouri | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Nebraska | e. | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Oklahoma | e. | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | North-Central U.S.A. | United States | South Dakota | e. | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Wisconsin | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Connecticut | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Indiana | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Maine | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Massachusetts | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Michigan | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | New Hampshire | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | New Jersey | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | New York | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Ohio | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Pennsylvania | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Rhode Island | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Vermont | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | West Virginia | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | South-Central U.S.A. | United States | Texas | e. | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Alabama | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Arkansas | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Delaware | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Georgia | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Kentucky | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Louisiana | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Maryland | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Mississippi | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | North Carolina | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | South Carolina | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Tennessee | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Virginia | | Puff, C. 1977. The Galium obtusum group (Galium sect. Aparinoides, Rubiaceae). Bull. Torrey Bot. Club 104:202-208. |