W
- Waldsteinia fragarioides ssp. fragarioides (N)
- Wisteria floribunda (I)
- Wisteria frutescens (N)
- Wolffia borealis (N)
- Wolffia brasiliensis (N)
- Wolffia columbiana (N)
- Wolffiella gladiata (N)
- Woodsia ilvensis (N)
- Woodsia obtusa ssp. obtusa (N)
- Woodwardia areolata (N)
- Woodwardia virginica (N)
Read more about this topic: Flora Of Ohio