Common Name - -	Family : Order
Ram's-head lady's slipper - -	Orchidaceae : Asparagales
Red baneberry - -	Ranunculaceae : Ranunculales
Red clover - -	Fabaceae : Fabales
Red crownshaft palm - -	Arecaceae : Arecales
Red mangrove - -	Rhizophoraceae : Malpighiales
Red raspberry - -	Rosaceae : Rosales
Red ribbons - -	Onagraceae : Myrtales
Red valerian - -	Valerianaceae : Dipsacales
Redsepal evening-primrose - -	Onagraceae : Myrtales
Regnell's miltonia - -	Orchidaceae : Asparagales
Richer's St. John's wort - -	Hypericaceae : Theales
Rock arum - -	Araceae : Alismatales
Rock garden plant - -	Geraniaceae : Geraniales
Roman chamomile - -	Asteraceae : Asterales
Roman hyssop - -	Lamiaceae : Lamiales
Rotschildt’s ancistrochilus - -	Orchidaceae : Asparagales
Round-leaved oregano - -	Lamiaceae : Lamiales
Round-leaved wintergreen - -	Ericaceae : Ericales
Royal catchfly - -	Caryophyllaceae : Caryophyllales
Rumelian St. John's wort - -	Hypericaceae : Theales
Russian oregano - -	Lamiaceae : Lamiales