Associated organism genera: Rabdosia [4 taxa], Raciborskiella [115 taxa], Radermachera [1 taxon], Rafnia [23 taxa], Rajania [25 taxa], Ramalia [2 taxa], Ramalina [22 taxa], Ramichloridium [11 taxa], Ramsbottomia [1 taxon], Ramularia [74 taxa], Ramulispora [6 taxa], Rana [1 taxon], Randia [137 taxa], Ranunculus [536 taxa], Rapanea [182 taxa], Raphanus [261 taxa], Raphia [8 taxa], Raphidorrhynchium [9 taxa], Raphiolepis [6 taxa], Rapistrum [35 taxa], Rastococcus [1 taxon], Rastrococcus [2 taxa], Rathbunia [1 taxon], Rattus [31 taxa], Rauvolfia [110 taxa], Ravenala [36 taxa], Ravenelia [15 taxa], Ravenia [2 taxa], Rawenia [1 taxon], Rawsonia [2 taxa], Reaumuria [4 taxa], Rebentischia [4 taxa], Reboulia [1 taxon], Redbia [2 taxa], Refractohilum [3 taxa], Rehmannia [2 taxa], Reichardia [7 taxa], Reinwardtia [2 taxa], Rejoua [2 taxa], Relbunium [3 taxa], Relchela [4 taxa], Relhania [1 taxon], Remirea [1 taxon], Renealmia [13 taxa], Reseda [31 taxa], Restio [2 taxa], Resupinatus [2 taxa], Retama [5 taxa], Reynosia [4 taxa], Reynoutria [5 taxa], Rhabditis [8 taxa], Rhabdospora [18 taxa], Rhacoma [22 taxa], Rhaeoma [1 taxon], Rhagadiolus [2 taxa], Rhagadolobium [1 taxon], Rhagadostoma [6 taxa], Rhamnella [2 taxa], Rhamnus [459 taxa], Rhamphoria [1 taxon], Rhaphiolepis [2 taxa], Rhaphiostylis [2 taxa], Rhaphithamnus [6 taxa], Rhapis [22 taxa], Rhaponticum [5 taxa], Rheedia [9 taxa], Rheum [46 taxa], Rhexia [1 taxon], Rhigiocarya [2 taxa], Rhinacanthus [4 taxa], Rhinanthus [28 taxa], Rhinoceros [3 taxa], Rhinocladiella [31 taxa], Rhinocladium [4 taxa], Rhinotrichum [3 taxa], Rhipsalis [2 taxa], Rhizidiomyces [8 taxa], Rhizocarpon [18 taxa], Rhizoctonia [1 taxon], Rhizomorpha [1 taxon], Rhizophlyctis [6 taxa], Rhizophora [138 taxa], Rhizophydium [12 taxa], Rhizopogon [5 taxa], Rhizopus [17 taxa], Rhizosphaera [4 taxa], Rhizosphaerina [1 taxon], Rhodamnia [1 taxon], Rhodiola [1 taxon], Rhodoarrhenia [1 taxon], Rhodobryum [2 taxa], Rhododendron [564 taxa], Rhodomyrtus [3 taxa], Rhodopis [1 taxon], Rhodostachis [5 taxa], Rhodosticta [9 taxa], Rhodotorula [13 taxa], Rhodotypos [3 taxa], Rhodura [1 taxon], Rhoeo [5 taxa], Rhoiacarpos [15 taxa], Rhoicissus [47 taxa], Rhoiocarpus [38 taxa], Rhombostilbella [6 taxa], Rhopalomyces [1 taxon], Rhopalosiphum [2 taxa], Rhopalostylis [3 taxa], Rhopographus [2 taxa], Rhus [391 taxa], Rhymbocarpus [2 taxa], Rhynchaenus [1 taxon], Rhynchelytrum [78 taxa], Rhynchocoris [2 taxa], Rhynchomeliola [14 taxa], Rhynchonectria [1 taxon], Rhynchosia [228 taxa], Rhynchospora [234 taxa], Rhytidenglerula [5 taxa], Rhytidhysterium [9 taxa], Rhytidhysteron [31 taxa], Rhytidophyllum [2 taxa], Rhytisma [29 taxa], Ribes [774 taxa], Riccardia [1 taxon], Riccia [20 taxa], Richardia [5 taxa], Richea [10 taxa], Richeria [1 taxon], Ricinodendron [1 taxon], Ricinus [313 taxa], Rigidoporus [15 taxa], Rimbachia [2 taxa], Rimularia [2 taxa], Rindera [3 taxa], Rinodina [4 taxa], Rinorea [21 taxa], Ripogonum [2 taxa], Rivea [15 taxa], Rivina [25 taxa], Rivinia [2 taxa], Rizalia [2 taxa], Rizaliopsis [10 taxa], Robillarda [8 taxa], Robinia [914 taxa], Robinsonia [5 taxa], Robledia [1 taxon], Roccella [1 taxon], Rochelia [1 taxon], Roegneria [7 taxa], Roemeria [1 taxon], Rogellia [7 taxa], Rohdea [2 taxa], Rollandia [4 taxa], Rollinia [14 taxa], Romellia [1 taxon], Romulea [5 taxa], Rondeletia [117 taxa], Rorippa [29 taxa], Rosa [2020 taxa], Roscoea [3 taxa], Rosellinia [12 taxa], Roselliniella [5 taxa], Rosenscheldiella [8 taxa], Roseodiscus [1 taxon], Rosmarinus [9 taxa], Rostellularia [1 taxon], Rostkovia [11 taxa], Rotala [3 taxa], Rothmannia [6 taxa], Rottboellia [185 taxa], Roupala [58 taxa], Roupellia [1 taxon], Rourea [52 taxa], Rousselia [4 taxa], Royena [30 taxa], Roystonea [1171 taxa], Rozella [9 taxa], Rozellopsis [1 taxon], Rubacer [4 taxa], Rubia [51 taxa], Rubus [1627 taxa], Rudbeckia [38 taxa], Rudgea [2 taxa], Rudolphia [9 taxa], Ruellia [40 taxa], Rumex [719 taxa], Rumohra [22 taxa], Rungia [8 taxa], Ruprechtia [1 taxon], Rusa [9 taxa], Ruscus [103 taxa], Russelia [3 taxa], Russula [28 taxa], Ruta [6 taxa], Ruthea [1 taxon], Ruthia [4 taxa], Rutidea [4 taxa], Rutola [1 taxon], Ruttya [2 taxa], Ryania [2 taxa], Ryparobius [8 taxa], Rytilix [5 taxa]