List of Canadian plants by family X–Z
Main page: List of Canadian plants by family
- Xyris difformis — Carolina yellow-eyed-grass
- Xyris montana — northern yellow-eyed-grass
- Zannichellia palustris — horned pondweed
- Phyllospadix scouleri — Scouler's surf-grass
- Phyllospadix serrulatus — serrulate surf-grass
- Phyllospadix torreyi — Torrey's surf-grass
- Zostera marina — sea-wrack