| Name? | Group? | Type? | Source? | Images? |
| 'Nuccio's Melody Lane' | Nuccio | evg |
Galle85 |
| 'Nuccio's Mexicali Rose' | Nuccio | evg |
Galle87 |
| 'Nuccio's Mexicali Rose Pink' | Nuccio | evg |
Nuccio02 |
| 'Nuccio's Mexico' ('Mexico') | Nuccio | evg |
Galle85 |
| 'Nuccio's Misty Moon' | Nuccio | evg |
Galle85 |
| 'Nuccio's Mountain Smoke' | Nuccio | evg |
Galle87 |
| 'Nuccio's Mt. Baldy' ('Mt. Baldy', 'Mount Baldy') | Nuccio | evg |
Galle85 |
| 'Nuccio's Orchid Queen' | Nuccio | evg |
Galle85 |
| 'Nuccio's Orchid Robe' | Nuccio | evg |
Galle85 |
| 'Nuccio's Orchid Ruffles' | Nuccio | evg |
Galle87 |
| 'Nuccio's Pink Bubbles' | Nuccio | evg |
Galle85 |
| 'Nuccio's Pink Champagne' | Nuccio | evg |
Galle85 |
| 'Nuccio's Pink Cloud' | Nuccio | evg |
Galle85 |
| 'Nuccio's Pink Smoke' | Nuccio | evg |
Galle85 |
| 'Nuccio's Pink Snow' ('Pink Snow') | Nuccio | evg |
Galle85 |
| 'Nuccio's Pink Tiger' | Nuccio | evg |
Galle85 |
| 'Nuccio's Plum Purty' | Nuccio | evg |
Galle85 |
| 'Nuccio's Polka' | Nuccio | evg |
Galle85 |
| 'Nuccio's Popcorn' | Nuccio | evg |
Galle85 |
| 'Nuccio's Primavera' | Nuccio | evg |
Galle85 |
| 'Nuccio's Punkin' | Nuccio | evg |
Galle87 |
| 'Nuccio's Purple Robe' | Nuccio | evg |
Galle85 |
| 'Nuccio's Ragtime' | Nuccio | evg |
Nuccio02 |
| 'Nuccio's Rain Drops' | Nuccio | evg |
Galle85 |
| 'Nuccio's Razzle Dazzle' | Nuccio | evg |
Galle87 |
| 'Nuccio's Red Glitters' | Nuccio | evg |
Galle85 |
| 'Nuccio's Rise N' Shine' | Nuccio | evg |
Galle87 |
| 'Nuccio's Rose Glitters' | Nuccio | evg |
Galle85 |
| 'Nuccio's Show Girl' | Nuccio | evg |
Galle85 |
| 'Nuccio's Silver Crest' | Nuccio | evg |
Nuccio02 |
| 'Nuccio's Skyrocket' | Nuccio | evg |
Galle87 |
| 'Nuccio's Snowbound' | Nuccio | evg |
Galle87 |
| 'Nuccio's Snow Storm' | Nuccio | evg |
Galle87 |
| 'Nuccio's South Pacific' | Nuccio | evg |
Galle87 |
| 'Nuccio's Spring Charm' | Nuccio | evg |
Galle85 |
| 'Nuccio's Spring Delight' | Nuccio | evg |
Galle85 |
| 'Nuccio's Spring Echo' | Nuccio | evg |
Nuccio02 |
| 'Nuccio's Spring Festival' | Nuccio | evg |
Galle87 |
| 'Nuccio's Spring Fling' | Nuccio | evg |
Galle87 |
| 'Nuccio's Spring Glory' | Nuccio | evg |
Galle87 |
| 'Nuccio's Spring Triumph' | Nuccio | evg |
Galle87 |
| 'Nuccio's Sunburst' ('Sunburst') | Nuccio | evg |
Galle85 |
| 'Nuccio's Sunrise' | Nuccio | evg |
Galle85 |
| 'Nuccio's Treasure Chest' | Nuccio | evg |
Galle87 |
| 'Nuccio's Variegated Red Ruffles' | Nuccio | evg |
Galle85 |
| 'Nuccio's Vintage Champagne' | Nuccio | evg |
Galle85 |
| 'Nuccio's Voodoo' | Nuccio | evg |
Galle87 |
| 'Nuccio's Warm Heart' | Nuccio | evg |
Galle85 |
| 'Nuccio's White Bubbles' | Nuccio | evg |
Galle87 |
| 'Nuccio's White Champagne' | Nuccio | evg |
Galle85 |
| 'Nuccio's Wild Cherry' | Nuccio | evg | Galle85 | p, b, b |
| 'Nuccio's Wishing Well' | Nuccio | evg |
Galle87 |
| 'Nuccio's Wonderland' | Nuccio | evg |
Galle87 |
| 'Nudiflora Coccinea' see 'Coccineum' | Ghent | dec |
IRRC04 |
| 'Nudiflora Colorata' see 'Coloratum' | Ghent | dec |
IRRC04 |
| 'Nudiflora Pink' | Pride | evg |
Galle87 |
| nudiflorum see periclymenoides | Species | dec |
Galle85 |
| Nudipe Azalea see nudipes | Species | dec |
Galle85 |
| nudipes ('Saikoku Mitsuba Tsutsuji', Nudipe Azalea) | Species | dec |
Galle85 |
| 'Nugget' | Beasley | dec |
Galle85 |
| 'Nulla Nulla' | Aus. & NZ | evg |
Galle85 |
| 'Numazu' | Tashiroi | evg |
RSF81 |
| 'Nymph' (HS 84-X-01) | Holly Springs | evg |
Vines90 |
| 'Nyoho-no-hikari' | Satsuki | evg |
SatDict97 |
| 'Nyohozan' | Satsuki | evg | Galle85 | p, b, b, t |
| O7G | Gable | evg |
Tingle57 |
| 'Oakton' | Virginia Royalty | evg |
Galle85 |
| 'Oba Tsutsuji' see nipponicum | Species | dec |
Galle85 |
| 'Obergartner Nietner' ('Oberhofgartner Nietner') | Mollis | dec |
Galle87 |
| 'Oberhofgartner Nietner' see 'Obergartner Nietner' | Mollis | dec |
Galle87 |
| 'Oberon' | Kaempferi | evg |
Galle85 |
| oblongifolium see viscosum | Species | dec |
Galle85 |
| 'Oboro Tsuki' | Satsuki | evg |
Galle85 |
| 'Oborozuki' | Satsuki | evg |
SatDict97 |
| 'Obsession' (HS 84-33-05) | Holly Springs | evg |
Vines90 |
| 'Obtusum' ('Kirishima Tsutsuji', 'Ramentaceum', Kirishima Azalea) | Species | evg |
Galle85 |
| 'Obtusum Album' see 'Ramentaceum' | Obtusum | evg |
Galle85 |
| obtusum f. japonicum see kiusianum | Species | evg |
Galle85 |
| occidentale (Pacific Azalea, Smooth Azalea, Western Azalea) | Species | dec | Galle85 | s, s, b, o |
| 'Ocean Gold' | Occidentale | dec |
Galle85 |
| 'Ocean Mist' | Occidentale | dec |
Galle85 |
| 'Ochoco' | Slonecker | dec |
Galle85 |
| 'Ochroleuca' | Ghent | dec |
Galle87 |
| 'Oconee Arrow' | Towe | dec |
Galle87 |
| Oconee Azalea see flammeum | Species | dec |
Galle85 |
| 'Octavian' see 'Tamino' | Robin Hill | evg |
Transplant86 |
| 'October Pink' | Aus. & NZ | evg |
Galle85 |
| 'Odd Ball' see 'Joy of Paradise' | Eden | evg |
Galle87 |
| 'Odin' | Mollis | dec |
Galle87 |
| 'Odoratum' | | azd |
Galle85 |
| 'Oegawa' | Satsuki | evg |
SatDict97 |
| 'Oester' | Arendsii | evg |
Galle85 |
| 'Ogi' | Satsuki | evg |
SatDict97 |
| 'Ogikasane' ('Cherryblossom') | Kurume | evg |
Galle85 |
| 'Ogi-no-hana' | Satsuki | evg |
SatDict97 |
| 'Ogi-no-odorikaraki' ('Kojo-no-odorikaraki', 'Kojo-no-odorikaraski', 'Ogi-no-odorikaraski') | Kurume | evg |
Galle85 |
| 'Ogi-no-odorikaraski' see 'Ogi-no-odorikaraki' | Kurume | evg |
Galle87 |
| 'Ogon-no-mai' | Satsuki | evg |
Galle85 |
| 'Ogon-no-tsuki' | Satsuki | evg |
Galle85 |
| 'O-guruma' ('Kin-yori', 'Itoguruma', 'Yori-kurenai') | Tsutsuji | evg |
IRRC04 |
| 'Oh Golly' | Hager | evg |
Steele03 |
| 'Oh Heavens' | Hager | evg |
Galle85 |
| 'Ohio' | Chisolm-Merritt | evg |
Galle85 |
| 'Ohirayama' | Satsuki | evg |
SatDict97 |
| 'Oh My' | Satsuki | evg |
Galle85 |
| 'Oh Nuts' see 'O Nuts' | Hager | evg |
Galle85 |
| 'Oho' | Satsuki | evg |
SatDict97 |
| 'Oimatsu' | Kurume | evg |
Galle87 |
| 'Oimatsu' | Satsuki | evg |
SatDict97 |
| 'Oino Mezame' ('Melody', Wilson #25) | Kurume | evg |
Galle85 |
| 'Ojikanishiki' | Satsuki | evg |
SatDict97 |
| 'Oka' | Satsuki | evg |
SatDict97 |
| 'Okan' | Satsuki | evg |
SatDict97 |
| 'Okinamaru' | Satsuki | evg |
SatDict97 |
| 'Okina Nishiki' | Satsuki | evg |
Galle85 |
| 'Okina-no-tomo' | Satsuki | evg |
SatDict97 |
| 'Okura-no-tsuki' see 'Okura-no-tuki' | Satsuki | evg |
SatDict83 |
| 'Okura-no-tuki' ('Okura-no-tsuki') | Satsuki | evg |
SatDict97 |
| 'Olde Gold' | Lazy K | dec |
AmAz04 |
| 'Old Faithful' (136G) | Gable | evg |
Galle85 |
| 'Old Gold' | Exbury | dec |
Galle85 |
| Oldham Azalea see oldhamii | Species | evg |
Galle85 |
| oldhamii ('Ovatosepalum', Oldham Azalea) | Species | evg |
Galle85 |
| 'Old Ivory' see 'Shin Seikai' | Kurume | evg |
Galle85 |
| 'Old Rose' | Aromi | dec | Azalean25:2 | b |
| 'Old Wine' | Coolidge | evg |
Galle85 |
| 'Olga' see 'Elektra' | Matous | evg |
IRRC04 |
| 'Olga Niblett' (T50-8) | Robin Hill | evg |
Galle85 |
| 'Olinda' | Aus. & NZ | evg |
Galle85 |
| 'Olympia' | Aus. & NZ | evg |
Galle85 |
| 'Olympic Sunrise' | | dec |
Roslyn95 |
| 'Omega' ('Antoine') | Deckert | evg |
Galle85 |
| 'Omen' | Glenn Dale | evg | Galle85 | b |
| 'Omoigawa' | Satsuki | evg |
SatDict97 |
| 'Omoine' ('Dame Lavender', Wilson #26) | Kurume | evg |
Galle85 |
| 'Omoi-no-maku' | Satsuki | evg |
Galle85 |
| 'Omurasaki' ('Calycinum', 'Kumagi-yodagawa', 'O-omurasaki', phoeniceum var. calycinum) | Phoeniceum | evg |
Galle85 |
| 'One-O-One' | EX-Childers | dec |
Galle85 |
| 'Only One Earth' | Aus. & NZ | evg |
Galle85 |
| 'Onmei' | Satsuki | evg |
SatDict97 |
| 'Onno Sora' | Kurume | evg |
Galle87 |
| 'Onsho' | Satsuki | evg |
Galle85 |
| 'O Nuts' ('Oh Nuts') | Hager | evg |
Galle85 |
| 'Onyo' | Satsuki | evg |
Galle87 |
| 'Oogocho' | Kurume | evg |
Galle85 |
| 'O-omurasaki' see 'Omurasaki' | Phoeniceum | evg |
Galle85 |
| 'Oouchi Yama' | Kurume | evg | Galle85 | o, o |
| 'Opal' (L-1) | Linwood Hardy | evg | Galle85 | p, b |
| 'Opal's Pride' see 'Pride of Prichard' | Southern Indian | evg |
Galle85 |
| 'Opera' | Glenn Dale | evg | Galle85 | b |
| 'Ophelia' | Aus. & NZ | evg |
Galle85 |
| 'Ophelia' | Kaempferi | evg |
Galle85 |
| 'Ophelia' | Mollis | dec |
Galle87 |
| 'Ophelila' | Matous | evg |
Galle87 |
| 'Opherie' | Ghent | dec |
Galle87 |
| 'Optima' | Amoena | evg |
Galle85 |
| 'Optima' | Ghent | dec |
Galle87 |
| 'Opus One' | Prinophyllum | dec |
Galle87 |
| 'Oracle' | Glenn Dale | evg | Galle85 | b |
| 'Orage' ('SS 37') | Deckert | evg |
Galle85 |
| 'Oranea' | Mollis | dec |
Galle85 |
| 'Orangeade' | Knap Hill | dec | Galle85 | b |
| 'Orange Ball' | Ilam | dec |
Galle85 |
| 'Orange Baron' | Sonoma | evg |
Galle85 |
| 'Orange Beauty' | Kaempferi | evg |
Galle85 |
| 'Orange Beauty' see 'Tsuta-momiji' | Kurume | evg |
Galle85 |
| 'Orange Beauty' | Wada | evg |
Galle85 |
| 'Orange Boven' | Belgian Indian | evg |
Galle85 |
| 'Orange Cape' | Girard | dec |
Galle85 |
| 'Orange Carpet' | Sommerville | dec |
RareFind04 |
| 'Orange Chimes' | Belgian Indian | evg |
Galle85 |
| 'Orange Cloak' | Girard | dec |
Galle85 |
| 'Orange Cloud' | Aromi | dec | Azalean25:2 | b |
| 'Orange Coral Bell' ('Gloria Mundi', 'Orange Coral Bells') | Kurume | evg |
Galle85 |
| 'Orange Coral Bells' see 'Orange Coral Bell' | Kurume | evg |
Galle85 |
| 'Orange Cup' | Kurume | evg |
Galle85 |
| 'Orange Daiquiri' | Mauritsen | evg |
Galle87 |
| 'Orange Delight' ('Mrs. John Ward') | Aus. & NZ | evg |
Galle85 |
| 'Orange Delight' | Eden | evg |
Galle85 |
| 'Orange Delight' | Southern Indian | evg |
Galle85 |
| 'Orange Favorite' | Kurume | evg |
Galle87 |
| 'Orange Flair' | Southern Indian | evg |
Galle85 |
| 'Orange Flare' | Back Acres | evg |
Galle85 |
| 'Orange Flash' | Girard | dec |
Galle85 |
| 'Orange Fluff' (HS 84-16-14) | Holly Springs | evg |
Vines90 |
| 'Orange Giant' | Kaempferi | evg |
Galle85 |
| 'Orange Glow' | Mollis | dec |
Galle85 |
| 'Orange Jolly' | Girard | dec |
Galle85 |
| 'Orange King' | Kaempferi | evg |
Galle85 |
| 'Orange King' | Mayo | evg |
Galle85 |
| 'Orange King' | Rutherford | evg |
Galle85 |
| 'Orange Man' | Ghent | dec |
Galle85 |
| 'Orange Popsickle' | Carlson | dec |
Galle85 |
| 'Orange Pride of Dorking' | Southern Indian | evg |
Galle85 |
| 'Orange Princess' | Puyallup Valley | dec |
Galle85 |
| 'Orange Queen' | Rutherford | evg |
Galle85 |
| 'Orange Red' | Aus. & NZ | evg |
Galle85 |
| 'Orange Rhyme' | Aromi | dec | Azalean25:2 | b |
| 'Orange Sander' | Aus. & NZ | evg |
Galle85 |
| 'Orange Sander' see 'Sverige' | Belgian Indian | evg |
Galle85 |
| 'Orange Sherbet' | Greenwood | evg |
Galle85 |
| 'Orange Supreme' | EX-Marty | dec |
Galle85 |
| 'Orange Surprise' | Mayo | evg |
Galle85 |
| 'Orange Truffles' | KH-Hiller | dec |
Galle85 |
| 'Orchid' | Pericat | evg |
Galle85 |
| 'Orchid' | Southern Indian | evg |
Galle85 |
| 'Orchid Beauty' (E-52) | Linwood Hardy | evg |
Galle85 |
| 'Orchid Belle' | Beltsville Dwarf | evg |
Galle85 |
| 'Orchidflora' see 'Orchiphilla' | Aus. & NZ | evg |
Galle85 |
| 'Orchidflora Pink' see 'Spellbound' | Aus. & NZ | evg |
Galle85 |
| 'Orchid Gem' | Aus. & NZ | evg |
Galle85 |
| 'Orchid Lace' | Girard | evg |
Galle85 |
| 'Orchid Lavender' see 'Orchiphilla' | Belgian Indian | evg |
Galle85 |
| 'Orchid Lights' | Northern Lights | dec |
Galle87 |
| 'Orchido' | Ring | evg | Galle85 | b |
| 'Orchid Pink' see 'Pavlova' | Aus. & NZ | evg |
Galle85 |
| 'Orchiphilla' ('Orchid Lavender', 'Orchidflora') | Belgian Indian | evg |
Galle85 |
| 'Orchis' | Coolidge | evg |
Galle85 |
| 'Ore Beni' (sp?) | Kurume | evg |
Galle85 |
| 'Oregon Pride' | Kaempferi | evg |
Galle87 |
| 'Oregon Queen' | | azd |
Galle85 |
| 'Orient' | Exbury | dec |
Galle85 |
| 'Orientale' | EX-Kern | dec |
Galle85 |
| 'Oriflamme' | Glenn Dale | evg | Galle85 | b |
| 'Orine Holme' | Griswold | evg | | b |
| 'Orion' | Kurume | evg |
Galle85 |
| 'Orison' | Glenn Dale | evg | Galle85 | b |
| 'Orlando Pride' | | evg |
Steele03 |