| Argemone albiflora | White Prickly Poppy, Bluestem pricklypoppy | Papaveraceae | A. alba. | 0 | 1 |
| Argemone mexicana | Prickly Poppy, Mexican pricklypoppy | Papaveraceae | A. ochroleuca. | 1 | 3 |
| Chelidonium majus | Greater Celandine, Swallow Wort, Greater Celandine | Papaveraceae | Chelidonium haematodes. Chelidonium laciniatum. Chelidonium luteum. Chelidonium umbelliferum. | 1 | 3 |
| Corydalis incisa | Incised fumewort | Papaveraceae | Fumaria incisa Thunb. (NGRP, 2017), Capnoides incisa Kuntze (The Plant List, 2017). The Plant List (2017) lists additional synonyms at the infraspecific level. | 1 | 1 |