| Hydrophyllaceae | |
Romanzoffia californica
| Greene | Pittonia 5(26B): 39–40 | 1902 |
| Hydrophyllaceae | |
Romanzoffia glauca
| Greene | Pittonia 5(26B): 38 | 1902 |
| Hydrophyllaceae | |
Romanzoffia leibergii
| Greene | Pittonia 5(26B): 38 | 1902 |
| Hydrophyllaceae | |
Romanzoffia macounii
| Greene | Pittonia 5(26B): 37 | 1902 |
| Hydrophyllaceae | |
Romanzoffia mendocina
| Greene | Pittonia 5(26B): 40–41 | 1902 |
| Hydrophyllaceae | |
Romanzoffia minima
| Brand | Pflanzenr. 59[IV,251]: 169–170 | 1913 |
| Hydrophyllaceae | |
Romanzoffia rubella
| Greene | Pittonia 5(26B): 37 | 1902 |
| Hydrophyllaceae | |
Romanzoffia sitchensis
| Bong. | Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 2(2): 158–159, pl. 4 | 1832 |
| Hydrophyllaceae | |
Romanzoffia spergulina
| Greene | Pittonia 5(26B): 41–42 | 1902 |
| Hydrophyllaceae | |
Romanzoffia suksdorfii
| Greene | Pittonia 5(26B): 38–39 | 1902 |
| Hydrophyllaceae | |
Romanzoffia thompsonii
| Marttala | Madroño 43(3): 405–413, f. 1, 2 [map] | 1996 |
| Hydrophyllaceae | |
Romanzoffia tracyi
| Jeps. | Fl. Calif. 3(2): 296–297 | 1943 |
| Hydrophyllaceae | |
Romanzoffia unalaschcensis
| Cham. | Horae Phys. Berol. 72, pl. 14 | 1820 |