Richardsons Sedge          

Richwoods Sedge          

Rigid Sedge          

Rio Grande Sedge          

Rio Grande Spikerush          

River Bulrush      

Riverbank Sedge          

Riverswamp Nutrush          

Roadside Flatsedge          

Roan Mountain Sedge          

Robbins Spikerush          

Rock Bulrush          

Rock Sedge      

Rock-dwelling Sedge          

Rockdwelling Sedge          

Rocky Mountain Bulrush          

Rocky Mountain Sedge          

Rollands Bulrush          

Rollands Sedge          

Rooted Spikerush