| Asteraceae | |
Antennaria howellii var. athabascensis
| (Greene) B. Boivin | Phytologia 23(1): 59 | 1972 |
| Asteraceae | |
Antennaria howellii var. campestris
| (Rydb.) B. Boivin | Phytologia 23(1): 59 | 1972 |
| Asteraceae | |
Antennaria howellii subsp. canadensis
| (Greene) R.J. Bayer | Brittonia 41(4): 397 | 1989 |
| Asteraceae | |
Antennaria howellii subsp. gaspensis
| (Fernald) Chmiel. | Canad. J. Bot. 73(9): 1369 | 1995 |
| Asteraceae | |
Antennaria howellii subsp. howellii
| | | |
| Asteraceae | |
Antennaria howellii var. howellii
| | | |
| Asteraceae | |
Antennaria howellii subsp. neodioica
| (Greene) R.J. Bayer | Brittonia 41(4): 397 | 1989 |
| Asteraceae | |
Antennaria howellii subsp. petaloidea
| (Fernald) R.J. Bayer | Brittonia 41(4): 397 | 1989 |