The following names have already been used within the genus and therefore cannot be re-used. This list is not in strict alphabetical order but is sorted including spaces, full stops etc. in row order. To look at other names click on the appropriate first letter.
| R. B. Cooke | R. Gray | R. T. Rackliff | Racemosa |
| Rachel | Rackliff | Ralph Cross | Ram |
| Ramulosa Major | Raye's Gold | Rebecca | Red |
| Red Gem | Red Glasnevin | Red Hairy Fury | Red Jewel |
| Red King | Red Pacifica | Red Pentreath | Red Queen |
| Red Rover | Red Shift | Red Signal | Red Spring Surprise |
| Red Summersnow | Redbreast | Redriggs | Renate |
| Reuthe's Variety | Rijneveld | Riko | Riverslea |
| Riverslea Purple | Rob Roy | Robert | Robert Jan |
| Robert Michael | Rock Pool | Rock Ruth | Rödhätte |
| Rodney | Rohrenblutige Erica | Roi Edouard | Rolleston Rambler |
| Rollisson's Blanda | Romance | Romantic Scotland | Romely |
| Romiley | Ronsdorf | Rosa | Rosa Diamant |
| Rosabella | Rosalie | Rosalind Schorn | Rosalinde Schorn |
| Rosanne Waterer | Rosantha | Rose | Rose Beauty |
| Rose Gem | Rose Queen | Rosea | Rosea Knap Hill |
| Rosea Splendens | Roseanne Waterer | Rosemarie | Rosey Gem |
| Rosita | Rosslare | Rossliare | Rosy Chimes |
| Rosy Gem | Rosy Gleam | Rosy Glow | Rosy Morn |
| Rosy Pink | Roter Kobold | Rotes Juwel | Rotkäppchen |
| Rotundiflora | Rotundifolia | Roundhill | Royal Gem |
| Rozanne Waterer | Rubens' Palette | Rubin Rose | Rubinette |
| Rubinfeuer | Rubinschimmer | Rubinteppich | Rubra |
| Rubra Dark | Rubrafolia | rubrocalyx | Rubrum |
| Ruby | Ruby Carpet | Ruby Gem | Ruby Glow |
| Ruby Pearl | Ruby Port | Ruby Queen | Ruby Shepherd |
| Ruby's Glow | Ruby's Select | Ruby's Variety | Ruby's Velvet |
| Rudi | Rufus | Ruth Rock | Ruthojo |
| Ruth's Gold | Ryan |
© The Heather Society, 1 January 2010