| Hostaname | RG | SZ | Leaf color | P | F | Origin |
| H. 'Rachel' Kuk’s Forest/B. Kuk 2005 | R | | dgr,goye | | | 'Heartache' x ventricosa |
| H. 'Racing Stripes' E. Elslager 2005 | R | | gr,str,y,cr | | | (x 'William Lachman') seedling |
| H. 'Radiance' Ken Anderson 1980 | R | ML | y | | | unknown |
| H. 'Radiant Edger' Mark Zilis 1990 | R | SM | gr,che | | | 'Gold Edger' sport |
| H. 'Radiant Star' C. Wilson/Hallson Gardens 2007 | R | | dgr,grye | | | 'Radiant Edger' sport |
| H. 'Radio Waves' Greg Johnson 2004 | R | | (ch>gr)c,gr | | | 'Shining Tot' seedling |
| H. 'Rain Dancer' Hans Hansen/Shady Oaks 2007 | R | L | blgr,chye | | | 'Blue Umbrellas' sport |
| H. 'Rain Forest' R. Goodwin 1996 | R | M | gr | | | rupifraga hybrid |
| H. 'Rainbow Falls' E. Elslager 2001 | R | | str,gr,y | | | 'Green Marmalade' x 'Halcyon' |
| H. 'Rainbow Glenn' R. Kuenster 2005 | R | | gry,str,crw | | | 'Dorothy Benedict' x (x 'Outrageous') |
| H. 'Rainbow's End' Hans Hansen 2005 | R | S | goy,dgre | | | 'Obsession' sport |
| H. 'Rainforest Sunrise' Winterberry Farms/J. Anderson 2003 | R | | y,gre | | | 'Maui Buttercups' sport |
| H. 'Raleigh Remembrance' Mark Zilis/Carolina Hosta Society 2003 | R | L | y | | | 'Sum and Substance' x plantaginea |
| H. 'Ralph's Legacy' S. & S. Zolock 2000 | R | | str,gr,cr | | | unknown |
| H. 'Rapture' Ran Lydell 2000 | R | M | gr>y | | | unknown |
| H. 'Rascal' Robert Solberg 1991 | R | L | ly,dgre | | | 'Gold Regal' sport |
| H. 'Raspberries and Cream' Mark Zilis/T. Toman 2004 | R | | | | | 'Raspberry Sorbet' sport |
| H. 'Raspberry Beauty' J. Dishon 1999 | R | | lgr | | | kikutii var. polyneuron x 'Summer Fragrance' |
| H. 'Raspberry Meringue' M. Zilis 2003 | R | | gry,dgre | | | 'Raspberry Sorbet' sport |
| H. 'Raspberry Parfait' H. Sugita/P. Ruh 1998 | R | M | gr | PI | | longipes x pycnophylla |
| H. 'Raspberry Sorbet' D. Lohman/M. Zilis 1999 | R | SM | dgr | RB | | rupifraga x 'Shining Tot' |
| H. 'Raven' Robert P. Savory 1993 | R | M | dgr | | | 'Fortunei Hyacinthina' hybrid |
| H. 'Raving Beauty' G. R. Goodwin 2003 | R | | goy | | | unknown |
| H. 'Ray of Hope' A. Tower/Bob Solberg 2005 | R | | gr,str,cr | | | laevigata sport |
| H. 'Rays of Sunshine' Fairway Enterprises 1990 | R | M | gr,naye | | | 'Fortunei Aureomarginata' sport |
| H. 'Razzle Dazzle' Kuk's Forest 1987 | R | SM | gr | RD | | sieboldiana hybrid |
| H. 'Rebecca' Mark Zilis 2004 | R | | | | | ('Marilyn' x 'Tardiflora') selfed |
| H. 'Red Baron' P. Cross 2001 | R | M | dgr | RB | | ventricosa 'Aureomarginata' hybrid |
| H. 'Red Cadet' Danny Van Eechaute 2005 | R | | blgr | R | | 'Riptide' x 'Blue Cadet' |
| H. 'Red Hot Flash' John Machen Jr. 2004 | R | M | y,gre | R | | 'Peedee Gold Flash' sport |
| H. 'Red Hot Poker' Stuart Asch 2005 | R | | dgr,crwe | | | 'Dorothy Benedict' x (x 'Dorothy Benedict') |
| H. 'Red Legs' H. Sugita/P. Ruh 1999 | R | | dgr | RD | | longipes x pycnophylla |
| H. 'Red Neck Heaven' Tony Avent 1998 | R | SM | gr | R | | kikutii caput-avis hybrid |
| H. 'Red Ryder' Alex Malloy 2001 | R | | dgr | PU | | 'Crepe Suzette Streaked' x 'Cherry Berry' |
| H. 'Red Sails in the Sunset' J. Van Ostrand 2004 | R | | | | | 'Peedee Gold Flash' seedling |
| H. 'Red Stepper' R. Goodwin 1996 | R | M | gr | R | | 'Invincible' hybrid |
| H. 'Red-hot Mama' E. Elslager 2001 | R | | str,gr,y | | | 'William Lachman' x 'Maekawa' |
| H. 'Redolent Nosegay' Jim Hawes 1999 | R | | str,dgr,cre | | Y+ | 'Fragrant Bouquet' sport |
| H. 'Reefed Sails' Charles R. Seaver 1994 | R | S | dgr,we | | | 'Don Stevens' x 'Sea Octopus' |
| H. 'Reflections' Randy Goodwin 2005 | R | | dgr,cre | | | unknown |
| H. 'Regal Chameleon' Clarence Falstad 2000 | R | L | cr>gr,dgre | | | 'Krossa Regal' sport |
| H. 'Regal Glory' E. Elslager 2001 | R | | str,gr,y | | | 'Color Glory' hybrid |
| H. 'Regal Heir' S. Tylinski 2003 | R | | str,blgr,w | | | 'Krossa Regal' sport |
| H. 'Regal Promenade' R. Snyder 1994 | R | L | blgr,str,cr | | | 'Krossa Regal' sport |
| H. 'Regal Providence' R. Snyder 1994 | R | L | crw,blgre | | | 'Krossa Regal' sport |
| H. 'Regal Rhubarb' Van M. Sellers 1983 | R | ML | gr | R | | unknown |
| H. 'Regal Ruffles' Eldren W. Minks 1980 | R | L | gagr | | | 'Ruffles' x sieboldiana 'Elegans' |
| H. 'Regal Rumor' Michael Laico 2003 | R | | str,gr,y,w | | | unknown |
| H. 'Regal Skies' B. Banyai 1999 | R | | blgr | | | 'Gold Regal' sport |
| H. 'Regal Splendor' Walters Gardens 1987 | R | ML | blga,crwe | | | 'Krossa Regal' sport |
| H. 'Regal Twist' D. Schulte/D. & D. Schulte 2007 | R | | crw,blgre | | | 'Krossa Regal' sport |
| H. 'Regalia' Ken Anderson 1992 | R | ML | lgr,blgre | | | 'Krossa Regal' sport |
| H. 'Reginald Kaye' Reginald Kaye Nursery/H. Klose/P. & J. Ruh 2003 | R | S | dgr | | | unknown |
| H. 'Rembrandt Blue' Steve C. Moldovan 1983 | R | L | dbl | | | sieboldiana 'Elegans' hybrid |
| H. 'Remember Me' G. van Eyk-Bos/D. van Erven/Walters Gardens 2001 | R | | y>crw,blgre | | | 'June' sport |
| H. 'Renaissance' Eldren W. Minks 1983 | R | ML | str,gr,ch,y | | | 'Flamboyant' sport |
| H. 'Resonance' Paul Aden 1976 | R | S | gr,we | | | 'Aden 270' x 'Aden 275' |
| H. 'Restless Sea' Hans Hansen 2006 | R | SM | gagr | | | 'Salute' hybrid |
| H. 'Resurrection Galaxy' E. Elslager 1999 | R | | str,dgr,cr,y | | | 'Galaxy' sport |
| H. 'Retread' F. Nyikos 2000 | R | | w>str,w,gr | | | 'Undulata Univitata' hybrid |
| H. 'Revelations' E. Moore 1993 | R | M | lgr,gre | | | 'Fortunei Hyacinthina' sport |
| H. 'Reverie' J. & S. Wilkins 2003 | R | | crw,blgre | | | 'Herb Benedict' x 'Love Pat' |
| H. 'Reversed' Paul Aden 1978 | R | SM | y,gre | | | (x sieboldiana) sport |
| H. 'Revolution' G. van Eijk-Bos/Walters Gardens 2000 | R | M | cr,spe,gr,dgre | | | 'Loyalist' sport |
| H. 'Rhapsody in Blue' R. Benedict/J. & J. Wilkins 1995 | R | M | blgr | | | rupifraga hybrid |
| H. 'Rhein' Heinz Klose 1988/P. & J. Ruh 2003 | R | S | blgr | | | tardiflora x 'Elegans' |
| H. 'Rhinestone Cowboy' E. Elslager 2000 | R | | str | | | 'Sea Prize' x 'Maekawa' |
| H. 'Rhino' G. Goodwin 2000 | R | M | gr,we | | | 'Splashed Leather' sport |
| H. 'Rhino Hide' Don Rawson 2007 | R | M | lgr,ble | | | unknown |
| H. 'Rhubarb Pie' I. Johnson 2001 | R | | gr | R | | 'Regal Rhubarb' sport |
| H. 'Rhythm and Blues' Greg Johnson 2004 | R | | | | | 'Shining Tot' seedling |
| H. 'Rich Uncle' A. Malloy 2002 | R | | gry | | | 'Abiqua Recluse' sport |
| H. 'Richland Blue' Van Wade 2007 | R | | blgr | | | 'Great Expectations' sport |
| H. 'Richland Charmer' V. Wade 2000 | R | | gry,dgre | | | 'Richland Surprise' sport |
| H. 'Richland Gold' Van Wade 1987 | R | ML | ly | | | 'Gold Standard' sport |
| H. 'Richland Gold's Moonlight' Van Wade 1999 | R | ML | y,cre | | | 'Richland Gold' sport |
| H. 'Richland Green Splish' Van Wade 1999 | R | ML | gr | | | 'Splish Splash' sport |
| H. 'Richland Royal Princess' Van Wade 1999 | R | M | gr,we | | | 'Richland Royal Prince' sport |
| H. 'Richland Royal Purple' Van Wade 1999 | R | | gr | | | 'Richland Royal Prince' sport |
| H. 'Richland Surprise' V. Wade 1999 | R | | dgr,cre | | | 'Splish Splash' sport |
| H. 'Richland White Edge' V. Wade 1999 | R | | gr,grye | | | unknown |
| H. 'Richmond' M. Seaver 2004 | R | M | ch,cre | | | unknown |
| H. 'Rickrack' E. Lachman/T. Schmid 1999 | R | S | gr | | | unknown |
| H. 'Righteous Rays' R. Snyder 2003 | R | | goy | | | 'Sum and Substance' hybrid |
| H. 'Rim Rock' Robert P. Savory 1982 | R | S | dgr | | | (x venusta) x (x nakaiana) |
| H. 'Ring Around the Moon' R. Johnson 2004 | R | | | | | 'August Moon' sport |
| H. 'Ring of Fire' E. Elslager 1999 | R | | dgr,ye | | | 'Sea Prize' x 'Maekawa' |
| H. 'Ringtail' Kent Terpening/J. Maier 2005 | R | | gr | | | 'Green Fountain' hybrid |
| H. 'Rip Curl' P. Lynch 2005 | R | | gr | | | 'Sun Power' x 'King Michael' |
| H. 'Rippled Honey' Herb Benedict/P. & J. Ruh 2005 | R | ML | dgr | | Y+ | ventricosa x plantaginea |
| H. 'Rippling Rhythm' Robert P. Savory 1998 | R | ML | dgr | | | 'Bountiful' hybrid |
| H. 'Rippling Waves' Elizabeth Nesmith/AHS 1986 | R | XL | dgr | | | 'Glauca' x sieboldiana |
| H. 'Riptide' Van M. Sellers 1987 | R | M | blgr | RD | | unknown |
| H. 'Risa' Dirk Dupré 2006 | R | M | gr | RP | | unknown |
| H. 'Rise and Shine' Randy Goodwin 2006 | R | | goy | | | 'Bill Brincka' hybrid |
| H. 'Rising Sun' Kevin C. Vaughn 1988 | R | MVL | y | | | (x 'Summer Fragrance') x (x 'Aztec Treasure') |
| H. 'Rising Tide' Walters Gardens 1984 | R | M | blgr,nawe | | | 'Helen Doriot' hybrid |
| H. 'Risky Business' T. Avent/H. Hansen 2002 | R | M | w,gre | | | 'Striptease' sport |
| H. 'River Nile' Steve C. Moldovan 1983 | R | XL | bl | | | 'Golden Circles' sport |
| H. 'Robert Frost' William & Eleanor Lachman 1988 | R | L | blgr,(cr>w)e | | | 'Banana Sundae' x 'Frances Williams' |
| H. 'Robert's Rapier' R. Keller/White Oak Nursery 1996 | R | M | naw,gre | | | 'White Christmas' sport |
| H. 'Robin Hood' J. Schwarz 2000 | R | M | gr,dgre | | | unknown |
| H. 'Robin's Pride' G. Goodwin 2000 | R | | blgr | | | unknown |
| H. 'Robust Giant' unknown/P. & J. Ruh 2005 | R | | | | | unknown |
| H. 'Rock and Roll' Bob Kuk 1999 | R | | blgr | | | unknown |
| H. 'Rock Happy' Peter Ruh 1992 | R | SM | lgr | | | longipes hybrid |
| H. 'Rock Island Line' G. Rasmussen/A. Malloy 2001 | R | D | gr,crwe | | | 'Flamboyant' x venusta |
| H. 'Rock Master' Paul Aden 1982 | R | S | gr | | | venusta hybrid |
| H. 'Rocknoll Blue Dwarf' B. Saur/P. Ruh 1996 | R | | blgr | | | unknown |
| H. 'Rocky Fork' D. & J. Ward 2003 | R | | blgr | | | unknown |
| H. 'Rocky Mountain High' Bob Kuk 1991 | R | M | gr,che | | | 'Crispula' x sieboldiana |
| H. 'Rocky Road' Robert P. Savory 1988 | R | M | dgr | | | 'Fortunei' hybrid |
| H. 'Rod's Gold' R. Kuenster 2004 | R | | | | | 'Tokudama' selfed |
| H. 'Roderick' Russ O'Harra/Russ O'Harra Hosta Society 1999 | R | | blgr | | | unknown |
| H. 'Roller Coaster' E. Elslager 2001 | R | | dgr,ye | | | 'Dorothy Benedict' x hypoleuca |
| H. 'Roller Coaster Ride' Mark Zilis/Bob Solberg 2005 | R | S | gr,nawe | | | 'Ray of Hope' sport |
| H. 'Ron Damant' Richard and Mary Ford 2004 | R | L | blgr,crye | | | 'Fortunei Hyacinthina' sport |
| H. 'Roostertail' E. Elslager 2002 | R | | crw,dblgre | | | 'William Lachman' hybrid |
| H. 'Rosanne' Russ O'Harra/Russ O'Harra Hosta Society 1999 | R | S | y | | | unknown |
| H. 'Roscoe' Van Wade 1999 | R | | blgr | | | sieboldiana 'Elegans' x 'Frances Williams' |
| H. 'Roseann Walter' H. Benedict/Bob Kuk 2006 | R | | blgr,(y>cr)e | | | 'Dorothy Benedict' seedling |
| H. 'Rosebud' Dennis P. Savory 1992 | R | M | gr | | | unknown |
| H. 'Rosedale Alligator Tail' J. Hadrava 1999 | R | | dgr,we | | | 'RD-BS-1' x 'RD-BSS-5' |
| H. 'Rosedale Babe' J. Havrada 2000 | R | L | blgr | | | 'RD-BS' x 'RD-742' |
| H. 'Rosedale Barnie' J. Hadrava 1999 | R | | dgr | | | ventricosa x 'Invincible' |
| H. 'Rosedale Big Bopper' J. Hadrava 1999 | R | | gr | | | 'Sum and Substance' x sieboldiana 'Elegans' |
| H. 'Rosedale Black Hole' J. Havrada 2000 | R | L | blgr | | | 'RD-BS' x 'RD-742' |
| H. 'Rosedale Black Ice' J. Hadrava 1999 | R | | blgr | | | 'Galaxy' x sieboldiana 'Elegans' |
| H. 'Rosedale Blend Master' J. Havrada 2000 | R | M | str,gr,y | | | 'RD-BS' x '721' |
| H. 'Rosedale Blunder Bus' J. Havrada 2000 | R | M | str,dgr,goy | | | 'RD-BS' x '785' |
| H. 'Rosedale Bright and Sassy' J. Hadrava 1999 | R | | goy | | | unknown |
| H. 'Rosedale Brush Marks' J. Hadrava 1999 | R | | str,dgr,cr | | | 'RD-93' selfed |
| H. 'Rosedale Buddy Holly' J. Hadrava 1999 | R | | gr | | | unknown |
| H. 'Rosedale Butter Run' J. Hadrava 1999 | R | | str,y,blgr | | | 'RD-BS-1' x 'RD-BSS-6' |
| H. 'Rosedale Catcher's Mitt' J. Havrada 2000 | R | L | blgr | | | 'RD-BS' x '900' |
| H. 'Rosedale Daisy Mae' J. Hadrava 1999 | R | M | str,blgr,y | | | "seedling" x "seedling" |
| H. 'Rosedale Dandy Brandy' J. Hadrava 1999 | R | | str,lgr,cr | | | 'RD-93' selfed |
| H. 'Rosedale Dewy' J. Hadrava 1999 | R | | blgr | | | 'Galaxy' x sieboldiana 'Elegans' |
| H. 'Rosedale Dough Boy' J. Hadrava 1999 | R | | dgr | | | ventricosa x 'Invincible' |
| H. 'Rosedale Elizabeth Stratton' J. Hadrava 1999 | R | | y | | | 'Galaxy' x 'Fragrant Bouquet' |
| H. 'Rosedale for Pete's Sake' J. Hadrava 1999 | R | | gr,cre | | | unknown |
| H. 'Rosedale Frosted Malt' J. Hadrava 1999 | R | | str,lgr,w | | | 'RD-BS-1' x 'RD-BSS-6' |
| H. 'Rosedale Gee Wilikers' J. Havrada 2000 | R | S | str,dgr,cr | | | 'RD-BS' x '900' |
| H. 'Rosedale Gee-whiz' J. Havrada 2000 | R | S | str,dgr,cr | | | 'RD-BS' x '900' |
| H. 'Rosedale Genevieve' Hadrava 1999 | R | L | y | | | 'Galaxy' x 'Sum and Substance' |
| H. 'Rosedale Glacier Ice' J. Hadrava 1999 | R | | gr | | | 'Allen P. McConnell' x 'Yakushima Mizu' |
| H. 'Rosedale Golden Arches' J. Hadrava 1999 | R | | y | | | 'RD-BS-1' x 'RD-BSS-6' |
| H. 'Rosedale Golden Candlestick' J. Hadrava 1999 | R | ML | y | | | unknown |
| H. 'Rosedale Golden Chalice' J. Hadrava 1999 | R | | goy | | | "seedling" x "seedling" |
| H. 'Rosedale Golden Chips' J. Hadrava 1999 | R | | y | | | 'RD-BS-1' selfed |
| H. 'Rosedale Golden City' J. Hadrava 1999 | R | | y | | | unknown |
| H. 'Rosedale Golden Cufflinks' J. Hadrava 1999 | R | | y | | | 'RD-BS-1' x 'RD-BS-1' |
| H. 'Rosedale Golden Dipper' J. Hadrava 1999 | R | | gry,cre | | | unknown |
| H. 'Rosedale Golden Egg' J. Hadrava 1999 | R | | goy | | | 'RD-BS-1' x 'RD-BSS-3' |
| H. 'Rosedale Golden Fleece' J. Hadrava 1999 | R | | goy | | | 'RD-SSS-92' x 'RD-BS-1' |
| H. 'Rosedale Golden Goose' J. Hadrava 1999 | R | ML | goy | | | 'RD-BS-1' x 'RD-BS-1' |
| H. 'Rosedale Golden Hercules' J. Hadrava 1999 | R | | goy | | | "seedling" x "seedling" |
| H. 'Rosedale Golden June Bug' J. Hadrava 1999 | R | | goy | | | unknown |
| H. 'Rosedale Golden Lining' J. Hadrava 1999 | R | | y | | | 'RD-BSSS-92' x 'RD-BS-1' |
| H. 'Rosedale Golden Teapot' J. Havrada 2000 | R | L | y | | | 'RD-BS' x '220' |
| H. 'Rosedale Golden Trout' J. Hadrava 1999 | R | | gry | | | 'RD-BS-1' x 'RD-BSS-5' |
| H. 'Rosedale Golden Unicorn' J. Hadrava 1999 | R | | y | | | 'RD-BS-1' selfed |
| H. 'Rosedale Golden Washboard' J. Hadrava 1999 | R | | y | | | 'RD-BS-1' selfed |
| H. 'Rosedale Grant Wood' J. Havrada 2000 | R | M | str,lgr,cr | | | 'RD-BS' x '900' |
| H. 'Rosedale High Flyer' J. Hadrava 1999 | R | | str,dgr,cr | | | 'RD-93' selfed |
| H. 'Rosedale Houdini' J. Havrada 2000 | R | M | str,dgr,cr | | | 'RD-BS' x '998' |
| H. 'Rosedale Jack of Hearts' J. Havrada 2000 | R | M | str,dgr,y | | | 'RD-BS' hybrid |
| H. 'Rosedale Jack of Spades' J. Havrada 2000 | R | M | str,dgr,y | | | 'RD-BS' hybrid |
| H. 'Rosedale John Stratton' J. Hadrava 1999 | R | | blgr | | | 'RD-BS-1' x 'RD-BS-1' |
| H. 'Rosedale Knox' J. Hadrava 1999 | R | M | y | | | 'RD-BS-1' hybrid |
| H. 'Rosedale Leaping Lizards' J. Havrada 2000 | R | M | dgr,cre | | | 'RD-BS' hybrid |
| H. 'Rosedale Lela Mae' J. Hadrava 1999 | R | | y,blgre | | | "seedling" x "seedling" |
| H. 'Rosedale Lion's Mane' J. Havrada 2000 | R | S | w,dgre | | | unknown |
| H. 'Rosedale Little Puddle' J. Havrada 2000 | R | M | dgr | | | 'RS-BS' x 'RD-10' |
| H. 'Rosedale Lost Dutchman' J. Hadrava 1999 | R | ML | goy | | | 'RD-BS-1' x 'RD-BS-1' |
| H. 'Rosedale Marbled Swirl' J. Hadrava 1999 | R | | str,cr,gr | | | 'RD-BS-1' selfed |
| H. 'Rosedale Marsha Axmear Erb' J. Hadrava 1999 | R | | str,blgr,y | | | 'Galaxy' x 'Fragrant Bouquet' |
| H. 'Rosedale Misty Pathways' J. Havrada 2000 | R | L | dgr,ye | | | 'RD-BS' x 'RD-80' |
| H. 'Rosedale Mixmaster' J. Hadrava 1999 | R | M | str,blgr,cr | | | 'RD-BS-1' selfed |
| H. 'Rosedale Moonshine Delight' J. Hadrava 1999 | R | M | gr,ye | | | unknown |
| H. 'Rosedale Mr. Blue Jeans' J. Hadrava 1999 | R | L | blgr | | | 'RD-BS-1' x 'Galaxy' |
| H. 'Rosedale Mrs. President' J. Hadrava 1999 | R | | blgr | | | unknown |
| H. 'Rosedale My Love' J. Hadrava 1999 | R | | gr,we | | | 'Galaxy' x 'Fragrant Bouquet' |
| H. 'Rosedale Old Maid' J. Havrada 2000 | R | M | str,dgr,cr | | | 'RD-BS' x 'RD-71' |
| H. 'Rosedale Oriole' J. Havrada 2000 | R | M | str,gr,y | | | 'RD-BS' x 'RD-91' |
| H. 'Rosedale Paddy Wagon' J. Havrada 2000 | R | S | dgr,cre | | | 'RD-BS' hybrid |
| H. 'Rosedale Pebbles' J. Hadrava 1999 | R | | gr | | | 'Galaxy' x sieboldiana 'Elegans' |
| H. 'Rosedale Pickles' J. Hadrava 1999 | R | | blgr | | | 'Galaxy' x sieboldiana 'Elegans' |
| H. 'Rosedale Pie-eyed' J. Havrada 2000 | R | S | str,dgr,y | | | 'RD-BS' x 'RD--4' |
| H. 'Rosedale Queen Mum' J. Havrada 2000 | R | | | | | 'RD-BS' x "900" |
| H. 'Rosedale Rain Catcher' J. Havrada 2000 | R | L | dgr | | | 'RD-BS' x 'RD-2' |
| H. 'Rosedale Richie Vallens' J. Hadrava 1999 | R | XL | dgr,we | | | 'RD-BS-1' x 'Galaxy' |
| H. 'Rosedale Rip Van Winkle' J. Hadrava 1999 | R | L | gr | | | 'Northern Halo' x 'Paul's Glory' |
| H. 'Rosedale Robert Hackbarth' J. Hadrava 1999 | R | L | y | | | 'RD-BS-1' x 'RD-BSS-3' |
| H. 'Rosedale Rosette' J. Hadrava 1999 | R | M | blgr | | | 'RD-BS-1' x 'RD-BS-1' |
| H. 'Rosedale Scrambled Eggs' J. Hadrava 1999 | R | | goy | | | "seedling" x "seedling" |
| H. 'Rosedale Shady Lady' J. Havrada 2000 | R | M | str,dgr,y | | | 'Galaxy' x 'Fragrant Bouquet' |
| H. 'Rosedale Soup Bowl' J. Havrada 2000 | R | L | dgr | | | 'RD-BS' x 'RD-07' |
| H. 'Rosedale Spoons' J. Hadrava 1999 | R | | blgr | | | unknown |
| H. 'Rosedale Stitched in Silk' J. Hadrava 1999 | R | L | dgr | | | ventricosa x 'Invincible' |
| H. 'Rosedale Streaked Zipper' J. Havrada 2000 | R | M | str,dgr,cr | | | 'RD-BS' hybrid |
| H. 'Rosedale Sugar Time' J. Hadrava 1999 | R | S | dgr,we | | | 'RD-BS-1' x 'RD-BSS-6' |
| H. 'Rosedale Tablespoons' J. Havrada 2000 | R | M | goy | | | 'RD-BS' hybrid |
| H. 'Rosedale Terraced Hills' J. Hadrava 1999 | R | | gr | | | 'Galaxy' x sieboldiana 'Elegans' |
| H. 'Rosedale Thunderheads' J. Havrada 2000 | R | M | str,dgr,cr | | | 'RD-BS' hybrid |
| H. 'Rosedale Tie-dyed' J. Havrada 2000 | R | S | str,dgr,cr | | | 'RD-BS' x 'RD-13' |
| H. 'Rosedale Tractor Seat' J. Hadrava 1999 | R | L | gr | | | 'Galaxy' x sieboldiana 'Elegans' |
| H. 'Rosedale Viagra' J. Hadrava 1999 | R | | gry | | | 'RD-BS-1' x 'RD-BSS-6' |
| H. 'Rosedale Waterwheel' J. Havrada 2000 | R | M | str,dgr,cr | | | 'RD-BS' x "742" |
| H. 'Rosedale Yellow Brick Road' J. Hadrava 1999 | R | | cr,blgre | | | 'Galaxy' x sieboldiana 'Elegans' |
| H. 'Rosie Posie' Belle Gardens 1994 | R | S | gr,we | | | 'William Lachman' x montana |
| H. 'Rossing's Pride' R. Rossing 1993 | R | M | lgr,gre | | | 'Fortunei Hyacinthina' sport |
| H. 'Rotunda' Robert P. Savory 1988 | R | M | gr | | | 'Pearl Lake' hybrid |
| H. 'Rough and Ready' Ed Elslager 2004 | R | | | | | 'American Tisch Breeder' seedling |
| H. 'Rough Waters' Maxine Armstrong 1969 | R | ML | blga | | | 'Tokudama' hybrid |
| H. 'Roundabout' Robert P. Savory 1988 | R | SM | blgr | | | 'Rough Waters' hybrid |
| H. 'Roundhouse Blues' Tom Micheletti 1998 | R | M | blgr | | | unknown |
| H. 'Route 66' Mark Zilis/ECGC Distributors Ltd 2005 | R | | goy | | | 'Three Sisters' sport |
| H. 'Roxsanne' G. Heemskerk 2005 | R | M | lgr>y | | | 'Birchwood Parky's Gold' sport |
| H. 'Roxy Moxy' R. Meyer/Naylor Creek 2006 | R | | grw,crwe | | | 'Allegan Fog' sport |
| H. 'Roy Klehm' Hans Hansen 2007 | R | L | y,dgre | | | 'Summer Serenade' sport |
| H. 'Royal Accolade' William W. Zumbar 1986 | R | M | yc,gre,str | | Y | 'Royal Standard' sport |
| H. 'Royal Bells' J. Dishon 1999 | R | | gr,ye | | | ('Beatrice' x kikutii) x ('August Moon' x kikutii) |
| H. 'Royal Charm' M. Zilis 2003 | R | | lgr | | | 'Royal Tiara' sport |
| H. 'Royal Flush' Robert P. Savory 1985 | R | S | gr,ye | | | 'Fortunei' sport |
| H. 'Royal Golden Jubilee' Richard and Mary Ford 2004 | R | ML | y,dgre | | | 'Gold Standard' sport |
| H. 'Royal Lady' Gladys Holly/AHS 1986 | R | S | dgr | | | unknown |
| H. 'Royal Mouse Ears' E. & J. Deckert 2004 | R | | bl,str,gry | | | 'Blue Mouse Ears' sport |
| H. 'Royal Quilt' Caprice Farm Nursery 1988 | R | ML | bl | | | 'Great Lakes' x ('Fortunei Robusta' x 'Ryan's Big One') |
| H. 'Royal Rainbow' Paul Aden 1978 | R | SM | w,dgre | | | 'Bold One' x 'Flamboyant' |
| H. 'Royal Rhubarb' P. Ruh/D. Pallone/J. Ruh 2005 | R | | | R | | 'Regal Rhubarb' seedling |
| H. 'Royal Standard' Grulleman/Wayside 1965/AHS 1986 | R | ML | gr | | Y+ | plantaginea x sieboldiana |
| H. 'Royal Super' Walters Gardens 2000 | R | SM | gr,cre | | Y | 'Royal Standard' sport |
| H. 'Royal Tapestry' Jim Schwarz 2002 | R | L | blgr,(y>cr)e | | | 'Sea Prize' hybrid |
| H. 'Royal Tiara' T&Z Nursery/Mark Zilis 1988 | R | S | nawc,gre | | | unknown |
| H. 'Royal Wave' G. Johnson 2004 | R | | | | | 'Royal Tiara' sport |
| H. 'Royalty' Ken Anderson 1982 | R | S | dy | | | unknown |
| H. 'Rubber Ducky' J. Schwarz 1996 | R | SM | lgr | | | unknown |
| H. 'Ruby Benedict' Herb & Dorothy Benedict 1991 | R | M | cr,blgre | | | 'Dorothy Benedict' x 'Tokudama Aureonebulosa' |
| H. 'Ruby Slippers' D. & J. Ward 1999 | R | | gr | | | 'Iwa' hybrid |
| H. 'Ruffled Petticoats' Jane & Bernie Diesen 1998 | R | L | gr | | | 'Green Piecrust' hybrid |
| H. 'Ruffles' Dick Lehman/AHS 1986 | R | L | gr | | | unknown |
| H. 'Ruffles Pale Face' E. Schulz 2002 | R | | lgr | | | unknown |
| H. 'Rumpelstiltskin' Robert P. Savory/Dennis P. Savory 1997 | R | XL | dgr,ye | | | 'Vilmoriniana' hybrid |
| H. 'Russ O'Harra' Russ O'Harra/Olson/Zilis/Russ O'Harra Hosta Society 1999 | R | | gr | | | 'Elatior' selection |
| H. 'Russell Lee' Russ O'Harra/O'Harra family/Russ O'Harra Hosta Society 1999 | R | | blgr,lgre | | | unknown |
| H. 'Rusty Bee' A. Malloy 1998 | R | | lgr | R | | 'Beatrice' hybrid |
| H. 'Ryan's Big One' Lawrence D. Englerth 1982 | R | XL | blgr | | | unknown |