Plants
Articles about plant species, botany and vegetation.
Ranunculales
Ranunculales — an order of flowering plants
Rapeseed
Rapeseed (Brassica napus) — oilseed crop overview
Rapid plant movement
Rapid plant motions: mechanisms, examples and biological limits
Raspberry
Red huckleberry
Red huckleberry (Vaccinium parvifolium)
Red pine
Red pine (Pinus resinosa)
Redcurrant
Redcurrant (Ribes rubrum): description, uses and cultivation
Redwood
Reed
Reed: plant, musical, and mechanical meanings
Reed (plant)
Reed (plant): ecology, uses, and cultural history
Resin
Rhododendron
Rhododendron: overview, characteristics, history and uses
Rhododendron niveum
Rhododendron niveum: a high‑altitude rhododendron of the eastern Himalaya
Rhododendron ponticum
Rhododendron ponticum — pontic or common rhododendron
Rhopalostylis sapida
Rhopalostylis sapida (nīkau) — New Zealand's native palm
Rhubarb
Rhynia
Rhynia — Early Devonian fossil genus of simple vascular plants
Ribes
Ribes: the genus of currants and gooseberries
Richea
Richea: Tasmanian and Australian genus of the heath family
Romaine lettuce
Romaine lettuce (cos): characteristics, uses, and cultivation
Rooibos
Root
Root hair
Root hair: structure, function, development, and importance
Root vegetable
Root vegetable: definition, types, uses and cultivation
Rosaceae
Rosaceae: the rose family — overview, traits, fruits, and uses
Rosales
Rosales (order of flowering plants)
Rose
Rose (Rosa) — Biology, Cultivation, Uses, and Cultural Significance
Rose garden
Rosemary
Rosemary (Rosmarinus officinalis) — aromatic evergreen herb
Rosewood
Rosewood (Dalbergia): characteristics, species, uses and conservation
Rosidae
Rosidae — a historical subclass of flowering plants
Rosids
Rosmarinus
Rosmarinus (rosemary): overview, characteristics, and uses
Rosoideae
Rosoideae: the rose subfamily of the Rosaceae family
Rowan
Rowan (Sorbus) — cool‑climate fruiting trees of the rose family
Rubiaceae
Rubiaceae: the madder, bedstraw and coffee family
Rubus
Rubus: the brambles and berries of the rose family
Rutaceae
Rutaceae: the rue and citrus family
Rye
Rye (Secale cereale): grain, cultivation, uses and history
Sacred fig
Saintpaulia
Saintpaulia (African violets): overview, care, and varieties
Salak
Salak (Salacca zalacca) — snake fruit of Southeast Asia
Salal
Salal (Gaultheria shallon): description, distribution, uses and ecology
Salicaceae
Salicornia
Salicornia: the glassworts — salt-tolerant succulents of coasts and marshes
Salmonberry
Salmonberry (Rubus spectabilis): appearance, habitat, and uses
Salvia
Salvia — the sage genus of the mint family
Salvia pratensis
Salvia pratensis (Meadow Clary): description, habitat and uses