(1) Rábano - Radicchio

(2) Radicchio - Rain Or Shine Daylily

(3) Rain Rocket Daylily - Rana Tampala

(4) Ranachadal - Rattlebox

(5) Rattlebox - Really Frilly Daylily

(6) Really Lizzie Daylily - Red Cedar

(7) Red Cedar Juniper - Red Lily

(8) Red Lily - Red Stemmed Saggitaria

(9) Red Stemmed Thalia - Redmond Rhododendron

(10) Redneck Palm - Reishi Rhododendron

(11) Reispapierbaum - Revenue Daylily

(12) Reverchon Bristlegrass - Rhythm And Blues Daylily

(13) Rhythm and Blues False Goats Beard - Rinón (Jfmo) (Venezuela)

(14) RinÃ³n - Roan Mountain False Goat's Beard

(15) Roan Mountain Goldenrod - Rock Quillwort

(16) Rock Ragwort - Rodricidium

(17) Rodrigues Hurricane Palm - Ronce Ornementale

(18) Ronce Petit-Mûrier - Rose Mandarin

(19) Rose Marsh Rhododendron - Rosemary Hyde Rhododendron

(20) Rosemary Mint - Rothrock Fiddleleaf

(21) Rothrock Grama - Round-Fruit Yellowcress

(22) Round-Fruited Banksia - Royal Magic Daylily

(23) Royal Magician Standard Dwarf Bearded Iris - Rudolph Hosta

(24) Rudolph Siedel Rhododendron - Runner Bean

(25) Runner Bean - Russian Iris

(26) Russian Iris - Ruwbeemdgras

(27) Ruwenzori Daylily - Røllike