| Asteraceae |
|
Lactuca canadensis
| L. | Sp. Pl. 2: 796 | 1753 |
| Asteraceae |
|
Lactuca canadensis var. albocaerulea
| Farw. | Rep. (Annual) Michigan Acad. Sci. 19: 249 | 1917 |
| Asteraceae |
|
Lactuca canadensis fo. angustata
| Wiegand | Rhodora 22(253): 11 | 1920 |
| Asteraceae |
|
Lactuca canadensis fo. angustipes
| Wiegand | Rhodora 22(253): 10 | 1920 |
| Asteraceae |
|
Lactuca canadensis fo. canadensis
| | | |
| Asteraceae |
|
Lactuca canadensis var. canadensis
| | | |
| Asteraceae |
|
Lactuca canadensis var. elongata
| (Muhl. ex Willd.) Farw. | Pap. Mich. Acad. Sci. 2: 46 | 1923 |
| Asteraceae |
|
Lactuca canadensis fo. exauriculata
| Wiegand | Rhodora 22(253): 11 | 1920 |
| Asteraceae |
|
Lactuca canadensis var. integrifolia
| (Bigelow) A. Gray | Manual (ed. 5) 281 | 1869 |
| Asteraceae |
|
Lactuca canadensis var. latifolia
| Kuntze | Revis. Gen. Pl. 1: 349 | 1891 |
| Asteraceae |
|
Lactuca canadensis var. longifolia
| (Michx.) Farw. | Pap. Mich. Acad. Sci. 2: 45 | 1923 |
| Asteraceae |
|
Lactuca canadensis var. montana
| Britton | Ill. Fl. N. U.S. 3: 274 | 1898 |
| Asteraceae |
|
Lactuca canadensis var. obovata
| Wiegand | Rhodora 22(253): 11 | 1920 |
| Asteraceae |
|
Lactuca canadensis fo. steelei
| (Britton) Fernald | Rhodora 40(480): 481 | 1938 |
| Asteraceae |
|
Lactuca canadensis fo. stenopoda
| Wiegand | Rhodora 22(253): 11 | 1920 |
| Asteraceae |
*
|
Lactuca canadensis var. typica
| Wiegand | Rhodora 22(253): 10 | 1920 |
| Asteraceae |
|
Lactuca canadensis fo. villicaulis
| Fernald | Rhodora 41(492): 574 | 1939 |