Scientific name: Raphanus sativus [Family: Brassicaceae / Cruciferae]
Synonym: R. caudatus
Common name: Radish
Chinese name: 萝卜
Location: Singapore
Date taken: 10 August 2009
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Scientific name: Ravenala madagascariensis [Family: Strelitziaceae]
Common name: Traveller's Palm, Traveller's Tree
Chinese name: 旅人蕉 , 扇芭蕉
Location: Singapore
Date taken: 12 October 2008
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Scientific name: Rhaphidophora korthalsii [Family: Araceae]
Synonym: R. celatocaulis
Common name: Shingle Creeper
Location: Singapore
Date taken: 3 July 2010
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Scientific name: Rhaphiolepis indica [Family: Rosaceae]
Synonym: Crataegus indica
Common name: Indian Hawthorn
Chinese name: 石斑木
Location: Singapore
Date taken: 10 August 2009
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Scientific name: Rhapis excelsa [Family: Arecaceae]
Synonym: R. flabelliformis
Common name: Lady Palm
Chinese name: 棕竹 , 观音棕竹
Location: Singapore
Date taken: 6 March 2009
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Scientific name: Rhinacanthus nasutus [Family: Acanthaceae]
Common name: Dainty Spurs
Chinese name: 白鹤灵芝 , 仙鹤草
Location: Singapore
Date taken: 26 January 2008
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Scientific name: Rhizophora apiculata [Family: Rhizophoraceae]
Synonym: R. candelaria, R. conjugata
Common name: Bakau Minyak
Location: Singapore
Date taken: 1 June 2008
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Scientific name: Rhizophora mucronata [Family: Rhizophoraceae]
Common name: Bakau Kurap
Chinese name: 红茄冬
Location: Singapore
Date taken: 1 January 2010
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Scientific name: Rhodamnia cinerea [Family: Myrtaceae]
Synonym: R. trinervia
Common name: Silverback, Memboyan
Location: Singapore
Date taken: 2 January 2009
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Scientific name: Rhododendron simsii [Family: Ericaceae]
Common name: Azalea
Chinese name: 杜鹃花
Location: Malaysia
Date taken: 8 July 2009
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Scientific name: Rhodomyrtus tomentosa [Family: Myrtaceae]
Common name: Rose Myrtle
Chinese name: 桃金娘 , 稔子 , 山稔 , 当梨
Location: Singapore
Date taken: 2 January 2009
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Scientific name: Rhopaloblaste singaporensis [Family: Arecaceae]
Synonym: Drymophloeus singaporensis, Ptychoraphis singaporensis, Ptychosperma singaporense
Common name: Kerinting
Location: Singapore
Date taken: 3 September 2011
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Scientific name: Rhynchospora rubra [Family: Cyperaceae]
Synonym: R. wallichii, Schoenus ruber, Morisia wallichii
Common name: Red Star Sedge
Chinese name: 刺子莞
Location: Singapore
Date taken: 20 August 2011
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Scientific name: Richardia scabra [Family: Rubiaceae]
Common name: Rough Mexican Clover
Location: Singapore
Date taken: 1 May 2007
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Scientific name: Ricinus communis [Family: Euphorbiaceae]
Common name: Castor Oil Plant, Castorbean
Chinese name: 蓖麻
Location: Singapore
Date taken: 5 July 2009
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Scientific name: Rondeletia leucophylla [Family: Rubiaceae]
Synonym: Arachnothryx leucophylla, Bouvardia discolor
Common name: Panama Rose, Bush Pentas
Location: Singapore
Date taken: 2 January 2009
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Scientific name: Rorippa indica [Family: Brassicaceae]
Synonym: Nasturtium indicum, Nasturtium montanum, Sinapis patens, Sisymbrium indicum
Common name: Variableleaf Yellowcress
Chinese name: 蔊菜
Location: Singapore
Date taken: 5 November 2011
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Scientific name: Rosa [Family: Rosaceae]
Common name: Rose
Chinese name: 玫瑰
Location: Indonesia
Date taken: 18 June 2007
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Scientific name: Rosmarinus officinalis [Family: Lamiaceae]
Common name: Rosemary
Location: Singapore
Date taken: 3 October 2010
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Scientific name: Rotheca incisa [Family: Lamiaceae]
Synonym: Clerodendrum incisum, Clerodendrum macrosiphon
Common name: Musical Note Plant
Location: Singapore
Date taken: 10 August 2009
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Scientific name: Rothmannia macrophylla [Family: Rubiaceae]
Synonym: Randia macrophylla
Common name: Angel's Trumpet, Hidung Babi
Location: Singapore
Date taken: 17 February 2010
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Scientific name: Rourea fulgens [Family: Connaraceae]
Synonym: Santaloides filgens
Common name: -
Location: Singapore
Date taken: 9 April 2011
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Scientific name: Rubus moluccanus [Family: Rosaceae]
Synonym: R. hillii
Common name: Broad-leaf Bramble, Wild Raspberry
Chinese name: 羽萼悬钩子
Location: Singapore
Date taken: 3 May 2010
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Scientific name: Ruellia repens [Family: Acanthaceae]
Synonym: Dipteracanthus repens
Common name: Creeping Ruellia
Location: Singapore
Date taken: 29 March 2008
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Scientific name: Ruellia rosea [Family: Acanthaceae]
Synonym: Ophthalmacanthus roseus
Common name: -
Location: Singapore
Date taken: 26 January 2009
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Scientific name: Ruellia simplex [Family: Acanthaceae]
Synonym: R. brittoniana, R. tweedieana, R. coerulea, R. spectabilis, Cryphiacanthus angustifolius
Common name: Desert Petunia, Mexican Petunia
Location: Singapore
Date taken: 26 June 2009
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HYBRID/CULTIVAR [1] , HYBRID/CULTIVAR [2] , HYBRID/CULTIVAR [3]

Scientific name: Ruellia tuberosa [Family: Acanthaceae]
Synonym: Ruellia tuberosa
Common name: Minnie Root, Wayside Tuberose
Chinese name: 紫莉花
Location: Singapore
Date taken: 28 November 2009
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Scientific name: Russelia equisetiformis [Family: Scrophulariaceae]
Synonym: R. juncea
Common name: Firecracker Plant, Coral Plant, Coralblow, Fountain Plant
Chinese name: 爆仗竹 , 炮竹红 , 花丁子
Location: Singapore
Date taken: 21 March 2008
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HYBRID/CULTIVAR

Scientific name: Ruta graveolens [Family: Rutaceae]
Common name: Common Rue, Herb-of-grace
Chinese name: 芸香
Location: Singapore
Date taken: 24 April 2010
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