R

Raceme [ Botany ]

Rachis [ Botany ]

Radial [ Botany ]

Radial spines [ Botany ]

Radiation [  Physics - Ecology - Climatology ]

Radicle [ Botany ]

Rain  [ Meteorology ]

Rain forest [ Ecology ]

Rainstorm [ Meteorology ]

Rainy season [ Climatology ]

Raised bed [ Horticulture ]

Ramet [ Botany ]

Random [ Botany ]

Range [ Biology ]

Reaction [ Biology - Physiology - Phytopathology ]

Re- [ Prefix ]

Receptacle [ Botany ]

Receptive [ Biology ]

Recessive [ Genetics ]

Reclassification [ Genetics ]

Recurved [ Botany ]

Red spider mites [ Taxonomy ]

Redescription [ Taxonomy ]

Reflexed  [ Botany ]

Regeneration  [ Botany - Biology ]

Regrowth  [ Botany - Biology ]

Regulator [ Biology - Physiology - Genetics ]

Rehydrate [ Botany - Biology ]

Relation - Related [ Biology - Genetics - Evolution]

Relatives [ Biology ]

Relictual [ Biology - Ecology ]

Replanting [ Horticulture ]

Repotting [Horticulture ]

Reproduction [ Biology ]

Reproductive [ Biology - Botany - Ecology ]

Reproductive meristem [ Botany ]

Reproductive organ [ Biology - Botany ]

Reproductive phase [ Biology -Botany ]

Reproductive potential [ Biology - Ecology ]

Reproductive system [ Biology - Botany ]

Reserve [ Biology ]

Reserve compound [ Biology ]

Reservoir [ Horticulture ]

Resin [ Botany - Biochemistry]

Resistance [ Botany- Horticulture]

Respiration [ Biology ]

Retention [ Biology - Pedology - Physiology ]

Reticulated [ Botany ]

Retraction [ Botany ]

Retrorse [ Botany ]

Retuse [ Botany ]

Reversion [ Genetics - Horticulture ]

Revolute [ Botany]

Rhizoctonia [ Phytopathology ]

Rhizome [ Botany ]

Rhizosphere [ Botany - Biology ]

Rhomboid - Rhomboidal  [ Botany ]

Rib [ Botany ]

Rigid [ Botany ]

Rim stamen [ Botany - Echinopsis morphology]

Rime frost [ Meteorology ]

Ring fasciation [ Botany ]

Ripe - Ripening [ Botany ]

RNA [ Genetics ]

Rock [ Geology - Pedology - Ecology - Agronomy  ]

Rodents [ Biology - Agronomy - Horticulture ]

Root [ Botany ]

Root ball [ Horticulture ]

Root cap [ Botany ]

Root crown [ Botany ]

Root graft [ Botany ]

Root hair [ Botany ]

Root prone [ Horticulture ]

Root pruning [ Horticulture ]

Root resistant [ Horticulture ]

Root rot [ Phytopathology ]

Root succulent [ Botany ]

Root system (or Apparatus) [ Botany ]

Root tip [ Botany ]

Rooting hormones [ Horticulture ]

Rooting medium [ Horticulture ]

Rootlet [ Botany ]

Rootstock [ Botany ]

Rosette [ Botany - Biology - Pathology ]

Rosulate [ Botany]

Rot [ Botany - Horticulture - Phytopathology ]

Rot prone [ Botany - Horticulture ]

Rotate[ Botany ]

Rounded [ Botany ]

Rudimentary [ Biology -Botany ]

Rugose [ Botany ]

Runner [ Botany ]

Rustic [ Horticolture ]