| Hostaname | RG | SZ | Leaf color | P | F | Origin |
| H. 'Baby Blue Eyes' Bob Solberg 2006 | R | DS | blgr | | | 'Cody' x 'Dorset Blue' |
| H. 'Baby Boomer' E. Elslager 2002 | R | | gr,str,gr,y,cr | | | 'Sea Prize' x montana 'Chirifu' |
| H. 'Baby Bunting' Robert P. Savory 1982 | R | DS | blgr | | | 'Rough Waters' hybrid |
| H. 'Bacchanal' Leroy Davidson/Peter Ruh 1991 | R | S | dgr | | | nakaiana seedling |
| H. 'Backyard Monster' Jim Schwarz 2007 | R | VL | gr,crwe | | | unknown |
| H. 'Bacon and Eggs' E. Elslager 2001 | R | | str,blgr,gr,w | | | 'Kevin Vaughn' hybrid |
| H. 'Ballerina' Robert P. Savory 1982 | R | SM | gr | | | venusta hybrid |
| H. 'Balloons' Belle Gardens 1994 | R | SM | gr | | | 'Anne Arett' hybrid |
| H. 'Banana Boat' Eleanor and William Lachman 1991 | R | SM | ly,dgre | | | 'Lachman 81-9' x 'Reversed' |
| H. 'Banana Muffins' Jim Schwarz 1996 | R | ML | goy | | | unknown |
| H. 'Banana Pudding' Tony Avent 2005 | R | | y | | | 'Peter Pan' x 'Sun Power' |
| H. 'Banana Sundae' Eldren W. Minks 1980 | R | M | str,gr,ch,cr>w | | | (x 'Fortunei') sport |
| H. 'Band of Gold' Ed Elslager 1999 | R | M | dgr,(y>cr)e | | | 'Dorothy Benedict' x hypoleuca |
| H. 'Banyai's Dancing Girl' Pauline Banyai 1987 | R | SM | gagr | | | 'Blue Boy' hybrid |
| H. 'Barbara' David Stone/Peter Ruh 1987 | R | SM | blgr | | | unknown |
| H. 'Barbara Elizabeth Hoover' C. Owens 2002 | R | | cr,dgre | | | 'Sally and Bob' sport |
| H. 'Barbara May' Bob Solberg 2004 | R | M | blgr | | | (pycnophylla x 'Harvest Dandy') x ('Blue Arrow' x 'Sea Fire') |
| H. 'Barbara White' Sandra Bond 1990 | R | M | ch | | | 'Tokudama' hybrid |
| H. 'Barbarosa' Alex Malloy 2002 | R | | gr | | | 'Blue Splendor' x rupifraga |
| H. 'Barney Fife' Tony Avent 1993 | R | SM | dgr | | | 'August Moon' x 'Tardiflora' |
| H. 'Battle Star' Randy Goodwin 2006 | R | | dgagr,ye | | | |
| H. 'Bea's Colossus' C. Tompkins/Walden-West/P. Ruh 2000 | R | L | gr | | | unknown |
| H. 'Bearnasius' Van Wade 2007 | R | S | blgr | | | unknown |
| H. 'Beat This Blue' E. Elslager 2002 | R | | blgr | | | unknown |
| H. 'Beaulah' David Stone/Peter Ruh 1988 | R | S | gr,whye | | | unknown |
| H. 'Beckoning' Tim Saville 2002 | R | | (gry>y),blgre | | | 'Blue Angel' sport |
| H. 'Bedazzled' Don Dean 1999 | R | SM | blgr,ye | | | 'Little Wonder' x 'Love Pat' |
| H. 'Beer Belly Blues' Rod Kuenster 2006 | R | | blgr | | | |
| H. 'Behemoth' Robert P. Savory 1988 | R | XL | gr | | | montana hybrid |
| H. 'Belinda' R. Simmering/L. Willett 2003 | R | | gry | GR | | 'Zounds' hybrid |
| H. 'Bell Bottom Blues' Kevin Walek/Naylor Creek 2004 | R | L | blgr | PI | | 'Jewel of the Nile' sport |
| H. 'Belle of the Ball' H. Sugita/P. Ruh 1998 | R | M | gr | PU | | kiyosumiensis x pycnophylla |
| H. 'Bells of Edinborough' Robert P. Savory 1993 | R | SM | gr | | | 'Rim Rock' hybrid |
| H. 'Benedict Arnold' Benedict Arnold 1996 | R | M | blgr,grwe | | | 'Dorothy Benedict' hybrid |
| H. 'Benediction' Rod Lysne 2006 | R | | goch>goy | | | 'Sun Power' x 'Cynthia' |
| H. 'Bengee' B. Harrison/Palmer/R. Bemis/P. Ruh 1999 | R | ML | y>lgr | | | 'Tokudama' hybrid |
| H. 'Bennie McRae' Natalee Suggs 1989 | R | ML | gr | | Y | plantaginea hybrid |
| H. 'Bestman' Dick & Jane Ward 2004 | R | | gr | | | 'Bridegroom' seedling |
| H. 'Betcher's Blue' Betcher/AHS 1986 | R | M | bl | | | 'Tokudama' hybrid |
| H. 'Bethel Big Leaf' Clarence O. Lantis 1979 | R | L | dgr | | | montana hybrid |
| H. 'Bethlehem' Van Wade 2007 | R | | | | | 'Christmas Tree Gala' sport |
| H. 'Betsy King' Frances Williams 1943/AHS 1986 | R | SM | gr | PUD | | decorata x sieboldii |
| H. 'Bette Comfrey' Doug Beilstein 2007 | R | | gr | | | unknown |
| H. 'Bette Davis Eyes' Kevin C. Vaughn 1987 | R | SM | dgr | | Y+ | 'Summer Fragrance' x 'Christmas Tree' |
| H. 'Betty' Herb Benedict 1983 | R | SM | dgr | | | nakaiana x ventricosa |
| H. 'Betty Darling' Clarence Owens 1989 | R | S | str,dgr,we | | | unknown |
| H. 'Bewitched' G. Kamp 2001 | R | | y,dgre | | | 'Golden Wheels' sport |
| H. 'Beyond Measure' G. Kamp 2001 | R | | blgr,nagoe | | | 'Sagae' hybrid |
| H. 'Big and Blue' Van Wade 2000 | R | L | bl | | | 'Dorothy Benedict' x 'Blue Seer' |
| H. 'Big Bad John' Ed Elslager 2005 | R | | gr,str,goy,cr | | | (x 'Dorothy Benedict') seedling |
| H. 'Big Boy' Lucille Simpers 1980 | R | VL | gr | | | montana hybrid |
| H. 'Big Daddy' Paul Aden 1978 | R | VL | blgr | | | sieboldiana x 'Tokudama' |
| H. 'Big Dipper' Bob Kuk 1995 | R | L | goy | | | 'Gold Regal' hybrid |
| H. 'Big Hearted' Ralph H. Benedict 1983 | R | ML | gr | | | nakaiana x 'Zager's Giant' |
| H. 'Big John' Clarence Owens 1986 | R | G | dgr | | | 'Mira' hybrid |
| H. 'Big Mama' Paul Aden 1978 | R | G | blgr | | | 'Blue Tiers' x 'Blue Angel' |
| H. 'Big Mamma's House' E. Elslager 2003 | R | XL | dblgr,str,y,cr | | | "'Dorothy Benedict' F1" hybrid |
| H. 'Big Mo' Ray B. Stephens 1990 | R | XL | dblgr | | | montana hybrid |
| H. 'Big Old Bob' S. & S. Zolock 2005 | R | | blgr | | | sieboldiana hybrid |
| H. 'Big Pizza Pie' E. Elslager 2001 | R | | ly,ble | | | 'Dorothy Benedict' x 'Maekawa' |
| H. 'Big Sam' Klopping 1963/AHS 1986 | R | XL | dgr | | | montana x sieboldiana |
| H. 'Big Shot' E. Minks/A. Arett 1992 | R | ML | lgr | | | unknown |
| H. 'Big Top' Ed Elslager 2003 | R | XL | dblgr | | | 'William Lachman' x hypoleuca |
| H. 'Big Zach' L. Jones 2002 | R | | blgr | | | 'Sagae' hybrid |
| H. 'Bigfoot' R. Duback 1998 | R | G | blgr | | | unknown |
| H. 'Bigga Luigi' Bob Kuk 2002 | R | ML | blgr | | | 'Simply Sharon' sport |
| H. 'Biggie' Ed Elslager 2003 | R | L | dgr | | | 'Sea Prize' x 'Maekawa' |
| H. 'Biggie's Breeder' E. Elslager 2004 | R | | dgr,str,y,crw | | | 'Biggie' seedling |
| H. 'Bilben Little Atlantis' W. Bennett 1998 | R | S | goy,str,gr | | | 'Gold Edger' sport |
| H. 'Bill and Eleanor' E. Lachman, T. Schmid 2001 | R | ML | goy,dgre | | | unknown |
| H. 'Bill Brincka' Brincka 1988 | R | ML | gr,ygre | | | 'Opipara' sport |
| H. 'Bill Dress's Blue' W. Dress,/M. Tobey/S. Chamberlain 1999 | R | D | bl>blgr | | | unknown |
| H. 'Bill Modrak' S. & S. Zolock 2002 | R | | dgr | | | 'Regal Rhubarb' hybrid |
| H. 'Bingo' Belle Gardens 1993 | R | M | gr,(y>cr)e | | | 'Tokudama Aureonebulosa' seedling |
| H. 'Birchwood Blue' Shaw 1966/AHS 1986 | R | M | blgr | | | sieboldiana x 'FRW #382' |
| H. 'Birchwood Elegance' Florence Shaw/AHS 1986 | R | VL | dgr | | | sieboldiana x 'FRW #382' |
| H. 'Birchwood Gem' F. Shaw/P. Ruh 1989 | R | S | gr | | | nakaiana hybrid? |
| H. 'Birchwood Gold' Shaw/AHS 1986 | R | SM | chy>gr | | | 'Sunlight' hybrid |
| H. 'Birchwood Green' Shaw/AHS 1986 | R | L | gr | | | sieboldiana x 'FRW #382' |
| H. 'Birchwood Parky's Blue' Shaw/AHS 1986 | R | M | blgr | | | unknown |
| H. 'Birchwood Parky's Gold' Florence Shaw/AHS 1986 | R | SM | ch>goy | | | 'Sunlight' hybrid |
| H. 'Birchwood Ruffled Queen' Shaw/AHS 1986 | R | ML | y>gr | | | 'Green Piecrust' hybrid |
| H. 'Birds of Happiness' Van Wade 1999 | R | | blgr | | | 'Blue Whirls' hybrid |
| H. 'Birth of the Blues' Ed Elslager 2005 | R | | blgr,str,lgr,y | | | "'Dorothy Benedict' F1" seedling |
| H. 'Birthday Cake' Tony Avent 2007 | R | | gr | | | 'Red Neck Heaven' x 'Invincible' |
| H. 'Bitsy Blue' Dennis P. Savory 2000 | R | DS | blgr | | | 'Indigo' x (x 'Bitsy Green') |
| H. 'Bitsy Gold' Robert P. Savory 1985 | R | D | ch>y | | | longissima x "Yellow hybrid" |
| H. 'Bitsy Green' Robert P. Savory 1985 | R | D | dgr | | | longissima x "Green hybrid" |
| H. 'Bix Blues' R. Simmering 2000 | R | ML | blgr | | | 'Halcyon' x sieboldiana 'Elegans' |
| H. 'Bizarre' Kuk's Forest 1986 | R | S | chy,we | | | 'Kabitan' hybrid |
| H. 'Black Beauty' Kate Carpenter 1984 | R | L | dgr | | | 'Green Piecrust' hybrid |
| H. 'Black Forest' C. Tompkins/P. & J. Ruh 2005 | R | | gr | | | unknown |
| H. 'Black Hills' Robert P. Savory 1983 | R | ML | dgr | | | 'Green Gold' hybrid |
| H. 'Black Jack Chew' Jim Schwarz 2005 | R | SM | dgr | | | 'Mutant Ninja' sport |
| H. 'Black Pearl' Peter Cross 2001 | R | M | dgr | PU | | 'Grand Master' hybrid |
| H. 'Blackfoot' M. Plater-Zyberk/R. Solberg 1994 | R | SM | ch>y | DR | | 'Kabitan' hybrid |
| H. 'Blackjack' Clarence Owens 1990 | R | L | dgr | | | sieboldiana 'Mira' x sieboldiana |
| H. 'Blast Off' Herb & Dorothy Benedict 1995 | R | XL | gry | | | 'Mikado' x 'Dorothy Benedict' |
| H. 'Blaue Ruh' H. Sugita/Pete Ruh 2003 | R | | bl | | | unknown |
| H. 'Blaue Venus' Heinz Klose 1988/P. & J. Ruh 2003 | R | MS | blgr | | | tardiflora hybrid |
| H. 'Blaufink' Heinz Klose 1990/P. & J. Ruh 2003 | R | M | bl | | | unknown |
| H. 'Blauglut' Heinz Klose 1990/P. & J. Ruh 2003 | R | M | bl | | | sieboldiana hybrid |
| H. 'Blaugold' Heinz Klose 1991/P. & J. Ruh 2003 | R | ML | lgr>y | | | sieboldiana hybrid |
| H. 'Blaumeise' Heinz Klose 1991/P. & J. Ruh 2003 | R | M | dgr | | | |
| H. 'Blauspecht' Heinz Klose/P. & J. Ruh 2003 | R | | bl | | | tardiflora x sieboldiana 'Elegans' |
| H. 'Blaze of Glory' E. Elslager 1999 | R | | gry | | Y | 'Pin Stripe' hybrid |
| H. 'Blazer' Ed Elslager 2005 | R | | blgr,lye | R | | (x 'Galaxy') seedling |
| H. 'Blazing Saddles' T. Avent 2000 | R | | dgr,cre | | | (x 'Beatrice') x 'Blue Umbrellas' |
| H. 'Blessings' Paul Aden 1983 | R | DS | ch>y,nawe | | | 'Tardiana grex yellow' hybrid |
| H. 'Blissful' G. Johnson/L. Ferguson 2004 | R | | blgr,crwe | | | 'Neat Splash' x 'Dorset Blue' |
| H. 'Blizzard' Winterberry Farms/J. Anderson 2003 | R | VL | gry,str,w | | | 'Sum and Substance' sport |
| H. 'Blockbuster' E. Elslager 2003 | R | XL | dgr,str,gr,y,cr | | | 'Sea Prize' x 'Maekawa' |
| H. 'Blondie' Gretchen Harshbarger 1982 | R | SM | lch>y | | | 'Tokudama Aureonebulosa' hybrid |
| H. 'Blood, Sweat and Tears' C. Linder/D. Dean 2000 | R | | gry | G | | 'Little Wonder' x 'Aspen Gold' |
| H. 'Bloody Mary' H. Sugita/P. Ruh 1999 | R | | gr | | | longipes x pycnophylla |
| H. 'Blooming Fool' E. Schulz 2002 | R | | gr | | | unknown |
| H. 'Blue Angel' Paul Aden 1986 | R | G | bl | U | | 'Aden 365' x 'Aden 361' |
| H. 'Blue Arrow' Ken Anderson 1982 | R | M | bl | | | unknown |
| H. 'Blue Baron' E. & J. Deckert 2005 | R | | blgr | | | unknown |
| H. 'Blue Bayou' Kevin C. Vaughn 1987 | R | L | blgr>gr | | | 'Frances Williams' hybrid |
| H. 'Blue Beauty' Florence Shaw/AHS 1986 | R | L | dblgr>dgr | | | sieboldiana hybrid |
| H. 'Blue Beetle' Alex Malloy 2005 | R | | blgr | PU | | 'Cinnamon Sticks' seedling |
| H. 'Blue Belle' Eric B. Smith/BHHS 1988 | R | M | blgr | | | tardiflora x sieboldiana 'Elegans' |
| H. 'Blue Belly' Rod Kuenster 2006 | R | | blgr | | | |
| H. 'Blue Betty Lou' Clarence Owens 1987 | R | ML | bl | | | 'True Blue' x 'Gold Regal' |
| H. 'Blue Blazes' Kevin C. Vaughn 1988 | R | ML | bl>gr | | | 'Blue Boy' x 'Polly Bishop' |
| H. 'Blue Blush' Eric B. Smith/BHHS 1988 | R | SM | blgr | | | tardiflora x sieboldiana 'Elegans' |
| H. 'Blue Boy' D. Stone/AHS 1986 | R | SM | blgr>dgr | | | nakaiana x sieboldiana |
| H. 'Blue Buns' Tony Avent 2007 | R | | | | | ('Invincible' x 'Hirao #59') x 'Big Daddy' |
| H. 'Blue Cadet' Paul Aden 1974 | R | SM | bl | | | 'Tokudama' hybrid |
| H. 'Blue Canoe' G. Black/P. Ruh 1999 | R | SM | blgr | | | unknown |
| H. 'Blue Canopy' S. Asch 2000 | R | | str,blgr,lgr | STR | | 'Dorothy Benedict' x (x 'Dorothy Benedict') |
| H. 'Blue Chip' H. Benedict/B. Olson 1997 | R | S | blgr | | | 'Dorset Blue' x 'Dorset Blue' |
| H. 'Blue Clown' H. & D. Benedict/J. & E. Stratton 1996 | R | S | blgr | | | 'Dorset Blue' selfed |
| H. 'Blue Danube' Eric B. Smith/BHHS 1988 | R | SM | blgr | | | tardiflora x sieboldiana 'Elegans' |
| H. 'Blue Delight' E. Moore 1993 | R | XL | blgr | | | 'Blue Mammoth' sport |
| H. 'Blue Diamond' Eric B. Smith/BHHS 1988 | R | ML | blgr | | | tardiflora x sieboldiana 'Elegans' |
| H. 'Blue Dimples' Eric B. Smith/BHHS 1988 | R | M | blgr | | | tardiflora x sieboldiana 'Elegans' |
| H. 'Blue Dome' Eldren W. Minks 1980 | R | ML | sibl | | | 'Tokudama' selfed |
| H. 'Blue Dragon Wings' Phyllis Kedl 2002 | R | | blgr | | | sieboldiana hybrid |
| H. 'Blue Eyes' R. Herman 1996 | R | SM | blgr | | | venusta hybrid |
| H. 'Blue Fan Dancer' Paul Aden 1976 | R | M | bl | | | 'Tokudama' hybrid |
| H. 'Blue Flame' Naylor Creek Nursery 2004 | R | S | blgr,crwe | | | 'Fragrant Blue' sport |
| H. 'Blue for You' Herb & Dorothy Benedict 1991 | R | SM | dblgr | | | 'Tokudama Aureonebulosa' selfed |
| H. 'Blue Freckles' B. Martin 2004 | R | | gry,spe,blgr | | | 'Birchwood Parky's Gold' sport |
| H. 'Blue Frost' Elizabeth Nesmith/AHS 1986 | R | XL | blgr>dgr | | | sieboldiana hybrid |
| H. 'Blue Genes' Tony Avent 2007 | R | | blgr | | | 'High Kicker' x 'Abiqua Drinking Gourd' |
| H. 'Blue Gown' William & Eleanor Lachman 1992 | R | M | blgr | | | unknown |
| H. 'Blue Haired Lady' G. Johnson 2004 | R | SM | blgr>dgr | | | yingeri seedling |
| H. 'Blue Hawaii' Olga Petryszyn 1999 | R | L | blgr | | Y | ('Bengee' x 'Sagae') x 'Tokudama Aureonebulosa' |
| H. 'Blue Heaven' Paul Aden 1976 | R | SM | bl | | | 'Blue Cadet' x 'Aden 355' |
| H. 'Blue Horizon' Lawrence D. Englerth 1985 | R | M | blgr | | | 'Tokudama' hybrid |
| H. 'Blue Ice' Ralph H. Benedict 1987 | R | DS | bl>gr | | | 'Dorset Blue' x 'Blue Moon' |
| H. 'Blue Jay' Ralph H. Benedict 1987 | R | SM | bl>gr | | | 'Dorset Blue' selfed |
| H. 'Blue June' Ralph H. Benedict 1987 | R | SM | bl | | | 'Blue Diamond' x 'Tardiana grex hybrid' |
| H. 'Blue Lace' Kevin C. Vaughn 1977 | R | L | blga | | | 'Frances Williams' selfed |
| H. 'Blue Lady' Eunice Fisher/Peter Ruh 1998 | R | SM | blgr | | | unknown |
| H. 'Blue Lagoon' Fleeta Brownell Woodroffe 1972 | R | M | blga | | | 'Tokudama' hybrid |
| H. 'Blue Lightning' Walters Gardens 2005 | R | | bl,str,y,cr | STR | | 'Blue Umbrellas' sport |
| H. 'Blue Line' Paul Aden 1987 | R | DS | bl | R | | 'Aden 412' x (pulchella sport) |
| H. 'Blue Maui' Bill Silvers 2006 | R | S | gr | | | 'Rainforest Sunrise' sport |
| H. 'Blue Max' M. Zilis/Walters Gardens/P. Ruh 1998 | R | ML | blgr | | | 'Helen Doriot' hybrid |
| H. 'Blue Mist' Walters Gardens/M. Zilis/P. & J. Ruh 2003 | R | M | blgr,mot,w | | | 'Blue Max' sport |
| H. 'Blue Monday' Robert Solberg 1998 | R | S | blgr | | | 'Peedee Gray Mulkin' x 'Popo' |
| H. 'Blue Moon' Eric Smith/Paul Aden 1976 | R | S | bl | | | tardiflora x sieboldiana 'Elegans' |
| H. 'Blue Mouse Ears' E. & J. Deckert 2000 | R | S | blgr | | | unknown |
| H. 'Blue Mouse Ears Supreme' W. Silvers 2007 | R | | gr,str,y,cr | | | 'Blue Mouse Ears' sport |
| H. 'Blue Music' P. & J. Ruh 2001 | R | | str,ygr,blgr | | | (tardiana sport) hybrid |
| H. 'Blue My Mind' Hans Hansen/Hideko Gowen 2003 | R | | blgr | | | 'Dorset Clown' sport |
| H. 'Blue Ox' Chet W. Tompkins/P. Ruh 1999 | R | VL | blgr | | | sieboldiana hybrid |
| H. 'Blue Pearl' Hillier Nursery/Krossa/Summers/Ruh 1994 | R | ML | blgr | | | unknown |
| H. 'Blue Piecrust' Alex J. Summers/AHS 1986 | R | ML | blgr | | | unknown |
| H. 'Blue Plisse' Clarence Soules 1990 | R | L | dblgr | | | sieboldiana x 'Tokudama' |
| H. 'Blue Ridge Mountains' E. Elslager 2001 | R | | blgr,grye | | | 'Galaxy' x hypoleuca |
| H. 'Blue River' D. Reath/R. Klehm 1998 | R | M | blgr,ye | | | 'True Blue' sport |
| H. 'Blue Rock' Stone/Fisher/AHS 1986 | R | ML | dblgr | | | unknown |
| H. 'Blue Saucers' Lolita K. Powell 1977 | R | L | bl | | | sieboldiana 'Elegans' x 'Frances Williams' |
| H. 'Blue Shadows' Ken Anderson 1980 | R | M | str,blgr,y | | | 'Tokudama Aureonebulosa' sport |
| H. 'Blue Skies' Eric B. Smith/BHHS 1988 | R | SM | blgr | | | tardiflora x sieboldiana 'Elegans' |
| H. 'Blue Skirt' Julia Geissler 1970 | R | L | blgr | | | unknown |
| H. 'Blue Sophistication' M. Zilis 2003 | R | M | blgr | | | 'Lakeside Sophistication' sport |
| H. 'Blue Spanish Eyes' E. Elslager 2002 | R | | dgr,str,bl,gry | | | 'Sea Prize' hybrid |
| H. 'Blue Splendor' M. Zilis/P. & J. Ruh 2002 | R | ML | blgr | | | 'Blue Moon' sport |
| H. 'Blue Star' J. Brennan 1998 | R | | blgr | | | unknown |
| H. 'Blue Suede Shoes' E. Elslager 2001 | R | | str,bl,y | | | 'Sea Prize' x 'Maekawa' |
| H. 'Blue Tiers' Paul Aden 1977 | R | LG | bl | | | (x 'Tokudama') x (x 'Tokudama') |
| H. 'Blue Troll' Robert P. Savory 1973 | R | M | bl | | | unknown |
| H. 'Blue Umbrellas' Paul Aden 1978 | R | G | bl>dgr | | | 'Tokudama' x sieboldiana 'Elegans' |
| H. 'Blue Velvet' Paul Aden 1976 | R | ML | blgr | | | (x 'Tokudama') x (x 'Tokudama') |
| H. 'Blue Vision' Paul Aden 1976 | R | VL | blgr | | | 'Aden 355' x 'Aden 353' |
| H. 'Blue Wedgwood' Eric B. Smith/Summers/BHHS 1988 | R | M | blgr | | | tardiflora x sieboldiana 'Elegans' |
| H. 'Blue Whirls' Paul Aden 1978 | R | ML | bl | | | "hybrid" x 'Blue Vision' |
| H. 'Blue without You' T. Kordner 2000 | R | | gry,blgre | | | 'Striptease' sport |
| H. 'Bluebeard's Castle' E. Elslager 2003 | R | | blgr,str,gry | | | 'Jim Wilkins' hybrid |
| H. 'Blueberry Pancakes' E. Elslager 2002 | R | | blgr,ye | | | 'Sea Prize' x hypoleuca |
| H. 'Blueberry Patch' E. Elslager 2001 | R | | str,blgr,y | | | 'Galaxy' x 'Maekawa' |
| H. 'Blueberry Tart' Bob Solberg 2005 | R | S | bl | | | 'Blue Cadet' x 'Fall Bouquet' |
| H. 'Bluebird' Robert P. Savory 1985 | R | M | bl | | | unknown |
| H. 'Bluegrass Country' E. Elslager 2001 | R | | dblgr,crwe | | | 'Sea Prize' x hypoleuca |
| H. 'Blueper' Tony Avent 2007 | R | | bl | | | 'Fragrant Blue' x 'Halcyon' |
| H. 'Blues in the Night' E. Elslager 2004 | R | | dgr,str,y | | | 'Dorothy Benedict' selfed |
| H. 'Blushing Bride' Hans Hansen 2007 | R | | gr | | Y | 'Fragrant Bouquet' x ('Iwa Hansen' x 'Shining Tot') |
| H. 'Blütenspiel' Heinz Klose 1990/P. & J. Ruh 2003 | R | M | dgr | | | unknown |
| H. 'Blythe Spirit' Roy Davidson/G. Schenk/P. Ruh 1990 | R | SM | blgr | | | unknown |
| H. 'Bob Koffler' S. & S. Zolock 2005 | R | | gry,str,cr | STR | | 'Fascination' seedling |
| H. 'Bob Olson' Herb & Dorothy Benedict 1995 | R | DS | dgr,cre | | | 'Yellow Splash' selfed |
| H. 'Bob Sanders' B. Sanders, E. Elslager 1998 | R | | str,gr,y,w | | | 'Gold Standard' sport |
| H. 'Bobbie Sue' Clarence Owens 1994 | R | ML | dgr,we | | | 'Marbled White' sport |
| H. 'Bocka' K. Squires/P. Ruh 1999 | R | SM | blgr | | | unknown |
| H. 'Bodacious Blue' R. Goodwin/R. Hiland/R. Whitmore 1999 | R | L | blgr | | | sieboldiana hybrid |
| H. 'Bojangles' D. Dean 1999 | R | | gr,crye | | | 'Swoosh' x kikutii yakusimensis |
| H. 'Bold and Beautiful' E.Elslager 2002 | R | | str,gr,y | | | (x 'Dorothy Benedict') selfed |
| H. 'Bold Edger' Kevin C. Vaughn 1983 | R | SML | dgr,ircrwe | | | 'Beatrice' x 'Frances Williams' |
| H. 'Bold One' Paul Aden 1978 | R | M | str,y,ch,w | | | 'Robusta Variegated form' x 'Green Gold' |
| H. 'Bold Ribbons' Paul Aden 1976 | R | ML | gr,crwe | | | unknown |
| H. 'Bold Ruffles' Mrs. Fred Arett 1975 | R | L | dgr | | | sieboldiana 'Elegans' sport |
| H. 'Bon Voyage' Eldren W. Minks 1980 | R | M | gagr | | | 'Tokudama' x 'Dear Heart' |
| H. 'Bonanza' E. Nesmith/P. Ruh 1997 | R | L | dgr | | | unknown |
| H. 'Bonnie' David Stone/Peter Ruh 1987 | R | SM | blgr | | | unknown |
| H. 'Bonnie's Bounty' B. Treichel 2000 | R | | dgr,blgre | | | unknown |
| H. 'Boogie Blues' Ed Elslager 2005 | R | | blgr,ly | | | (x ' Band of Gold') seedling |
| H. 'Boogie Woogie' Calvin Helsley 1998 | R | D | str,gr,cr,cre | | | 'Stiletto' sport |
| H. 'Booka' Henry Weissenberger 1986 | R | D | blgr | | | 'Blue Cadet' hybrid |
| H. 'Boots and Saddles' Eldren W. Minks 1983 | R | M | y,blgre | | | 'Tokudama Aureonebulosa' sport |
| H. 'Border Bandit' William & Eleanor Lachman 1992 | R | SM | blgr,crwe | | | 'Lachman 81-8' x 'Halcyon' |
| H. 'Border Favourite' Jan van den Top/Danny Van Eechaute 2004 | R | | dgr,ye | | | 'Sultana' sport |
| H. 'Borsch 1' Borsch Nursery 1930/P. Ruh 1999 | R | L | lgr | | | unknown |
| H. 'Borsch 4' W. Borsch/P. & J. Ruh 2005 | R | | gr | | | unknown |
| H. 'Borwick Beauty' G. & B. McBurnie/BHHS 1988 | R | ML | ch,blgre | | | sieboldiana 'Elegans' sport |
| H. 'Bottom Line' Winterberry Farms/J. Anderson 2003 | R | XL | gr,lye | | | 'Sum and Substance' sport |
| H. 'Boundary Waters' T. Olson/R. Olson 1999 | R | | blgr | | | unknown |
| H. 'Bountiful' Eunice V. Fisher 1971 | R | S | gr | | | nakaiana hybrid |
| H. 'Bows and Arrows' E. Elslager 2002 | R | | str,gr,y | | | (F1 seedling of 'Dorothy Benedict') x 'Maekawa' |
| H. 'Brandi Nicole' W. Daughenbaugh 2002 | R | | w,gre | | | 'Undulata Erromena' sport |
| H. 'Brandywine' R. Herold 1993 | R | S | gr | R | | (montana 'Aureomarginata' x venusta) x longipes f. hypoglauca |
| H. 'Brass Horn' Walden West/J. Hyslop/C. Purtymun 1999 | R | M | dgr,goye | | | 'Fortunei Stenantha' sport |
| H. 'Brass Ring' Ran Lydell 2000 | R | | dgr,(go>cr)e | | | 'Neat Splash' hybrid |
| H. 'Brave Amherst' William & Eleanor Lachman 1993 | R | ML | dgr,crwe | | | 'Christmas Tree' x 'Reversed' |
| H. 'Brave Attempt' W. Silvers 2007 | R | | blgr,str,y,cr | | | unknown |
| H. 'Bravo' Paul Aden 1980 | R | M | str,ch,cr,gr | | | 'Reversed' x 'Fascination' |
| H. 'Brazen Hussy' Robyn Duback 2000 | R | L | goy | | | montana x 'Gold Regal' |
| H. 'Bread Crumbs' M. Zilis/B. Solberg 2003 | R | D | crw,gre | | | 'Tiny Tears' sport |
| H. 'Break Dance' R. & L. Miller 2001 | R | M | y,mot,gr,gre | | | 'Fan Dance' sport |
| H. 'Breeders Choice' Kevin C. Vaughn 1987 | R | ML | str,y>w,gr | | | ('Beatrice' x 'Beatrice') x 'Frances Williams' |
| H. 'Brenda's Beauty' R. Keller 1992 | R | M | y,gre | | | 'Gold Standard' sport |
| H. 'Brenner Pass' Fleeta Brownell Woodroffe 1972 | R | M | str,ygr,blgre | | | 'Tokudama Aureonebulosa' hybrid |
| H. 'Bressingham Blue' Alan Bloom 1984 | R | ML | blgr | | | sieboldiana hybrid |
| H. 'Bridal Veil' Bob Hird 2003 | R | M | blgr,cre | | | unknown |
| H. 'Bridegroom' Herb & Dorothy Benedict/Hideko Gowen 1990 | R | SM | dgr | | | 'Holly's Honey' selfed |
| H. 'Bridgeville' J. Craig/A. Summers/P. Ruh 1999 | R | SM | dgr,lgre | | | unknown |
| H. 'Brigadier' M. Zilis 2003 | R | L | blgr | | | sieboldiana 'Elegans' x 'Hirao Supreme' |
| H. 'Brigham Blue' Van Bourgondien/P. Ruh 2002 | R | ML | blgr | | | unknown |
| H. 'Bright Eagle' Lydell 1998 | R | L | lgr>chy | | | unknown |
| H. 'Bright Glow' Paul Aden 1986 | R | SM | ch>goy | | | 'Aden 380' x 'Aden 382' |
| H. 'Brilliance' E. Elslager 2001 | R | | str,gr,y | | | 'Dorothy Benedict' hybrid |
| H. 'Brilliant Sunset' Ed Elslager 2005 | R | | crw,dgre | | | 'Merry Sunshine' sport |
| H. 'Brim Cup' Paul Aden 1986 | R | SML | dgr,ir(cr>w)we | | | 'Aden 392' x 'Wide Brim' |
| H. 'Broad Ripple' Clyde Crockett 1995 | R | S | blgr,ye | | | unknown |
| H. 'Broadway Frances' Crockett 1997 | R | | blgr,brye | | | 'Frances Williams' sport |
| H. 'Broken Hearted' Van Wade 2007 | R | | blgr | | | (x 'Elegans') selfed |
| H. 'Brooke' David Stone/Peter Ruh 1987 | R | SM | grga | | | unknown |
| H. 'Brooklynn's Baby Doll' Kevin Walek/S. DaPra 2007 | R | | gry | | | venusta x clausa |
| H. 'Brookwood Blue' Leola Fraim/Peter Ruh 1991 | R | ML | blgr | | | sieboldiana hybrid |
| H. 'Brother Bunyan' C. Tompkins/J. Ruh/P. Ruh 2002 | R | L | dgr | | | unknown |
| H. 'Brother Ronald' Eric B. Smith/BHHS 1988 | R | M | blgr | | | tardiflora x sieboldiana 'Elegans' |
| H. 'Brother Stefan' Olga Petryszyn 1998 | R | | y,gre | | | 'King Tut' x (x 'Mildred Seaver') |
| H. 'Bruce' David Stone/P. Banyai/P. Ruh 2002 | R | M | gr | | | unknown |
| H. 'Bruce's Blue' Briggs Nursery 1991 | R | M | sibl | | | unknown |
| H. 'Brutus' D. & M. Beilstein 2007 | R | | dgr | | | 'Sea Drift' x venusta |
| H. 'Bryce' C. Thompkins/P. & J. Ruh 2002 | R | | gr | | | unknown |
| H. 'Bubba' Tony Avent 1998 | R | SM | gr | R | | 'Sum and Substance' seedling |
| H. 'Buckanon' Steve C. Moldovan 1983 | R | XL | wbl | | | sieboldiana hybrid |
| H. 'Buckeye' T. Goad 2000 | R | | gr,goe | | | 'Sum and Substance' sport |
| H. 'Buckeye Blue' Handy Hatfield/J. & D. Ward 1997 | R | ML | bl | | | sieboldiana hybrid |
| H. 'Buckshaw Blue' Eric B. Smith/AHS 1986 | R | M | blgr | | | sieboldiana x 'Tokudama' |
| H. 'Buckwheat Honey' Ralph H. Benedict 1984 | R | SM | gr | | Y | 'Ginko Craig' x plantaginea |
| H. 'Buffy' Henry Weissenberger 1986 | R | S | blgr | | | 'Hadspen Blue' hybrid |
| H. 'Buggy Wheels' Alex Summers, P. & J. Ruh 2005 | R | ML | gry,dgre | | | 'Midwest Gold' sport |
| H. 'Bumblebee' Dennis P. Savory 2000 | R | L | goy | | | 'Honey' hybrid |
| H. 'Bunker Hill' P. Bennerup/Alex Malloy 2001 | R | ML | str,blgr,gr | | | 'Minuteman' sport |
| H. 'Butter and Eggs' J. Kerr 2000 | R | | str,gry,y | Y | | 'Neat Splash' hybrid |
| H. 'Butter Rim' Summers 1969/AHS 1986 | R | SM | gr,ye | | | sieboldii hybrid |
| H. 'Butter Yellow' Kevin C. Vaughn 1982 | R | SMLL | y | | | |
| H. 'Butternut Hill' Larry Englerth/P. & J. Ruh 2001 | R | L | y>ygr | | | hypoleuca x hypoleuca |
| H. 'Buzzard's Bay' A. Malloy 1999 | R | | blgr | | | 'Allen C. Haskell' sport |