American Rhododendron Society Plant Registry

Introduction: The following rhododendron and azalea names were approved and added to the International Rhododendron Register prior to February 1, 2009 by the Royal Horticultural Society, International Cultivar Registration Authority for the genus Rhododendron. The North American Registrar assisted the RHS by providing data for plants originating in North America.

References: Names conform to the rules and recommendations of the International Code of Nomenclature for Cultivated Plants - 7th Edition (2004). Color numbers refer to the RHS Colour Chart unless noted otherwise. Accompanying color names are taken from A Contribution toward Standardization of Color Names in Horticulture, R.D. Huse and K.L. Kelly, edited by D.H. Voss (ARS, 1984).

Format: Parentage lists the seed parent first, followed by an "(s)" if the direction of the cross is known; this is followed by an upper case "X"and then the name of the pollen parent. If either parent is itself a cross, the individual components within that cross are separated by a lower case "x". Parentheses are used only in describing the more complex crosses. Abbreviations are used where appropriate: (a) = azalea, (r) = rhododendron, (v) = vireya rhododen- dron, (z) = azaleodendron; H = hybridized by, G = grown to first flower by, R = raised by, S = selected by, N = named by, I = introduced commercially by, REG = registered by; dates are enclosed in parentheses immediately following the activity. Metric conversions of dimensions are reported in 5mm (0.2") increments for dimensions greater than 1" (25mm).

(a) 'Bobbi Gail':  Evergreen azalea: (unknown forcing double pink azalea used by B.Y. Morrison in Glenn Dale project) (s) X 'Treasure'. H (1947), G: Benjamin Yoe Morrison, Glenn Dale, MD; N (2008), I (2008), and REG (2008): William C. Miller III, Bethesda, MD. Fls single with usually 7 stamens, very occasionally one stamen is petaloid; 2 fls/flat truss, openly to broadly funnel-shaped, 2.3" (58mm) long x 2.8" (70mm) wide, with 5 wavy-edged lobes. Color white with occasional markings of strong purplish red (71B) in bud, opening inside white with a faint purplish tinge fading to white, with occasional strong purple (77B) stripes and sectors, and with a blotch of small, discrete spots, the color varying with age from moderate purplish pink (186D) to moderate orange yellow (164B); outside white with a very pale purplish tinge; self-colored strong purple (77B) fls occur but are not common. Calyx c 0.3"-0.4" (7-9mm) long, moderate yellow green (146D) edged strong yellow green (144A). Truss 2.4" (60mm) high x 4" (100mm) wide. Lvs 2" x 1" (50 x 25mm), elliptic, acute apex, cuneate base, flat margins; dull and slightly more yellow than moderate yellow green (137C) above. Hairs on midrib, blade, veins, and margin; when young, abaxial white and adaxial tan; when mature, tan. Shrub 2.8' (84cm) high x 4.5' (137cm) wide in 10 years; dense habit. Plant and bud hardy to at least -12°F (-24°C). April to May. (Note: Awarded blue ribbon for Best-in-Class and green ribbon for Best-in-Section at the Brookside Gardens Chapter, Azalea Society of America, 27th annual azalea show (2006).)

(r) 'April Morn':  Elepidote rhododendron: 'Nancy Evans' (s) X 'Tia'. H (2000), G (2005), N (2008), and REG (2008): Jim Barlup, Bellevue, WA. Fls 14/dome truss, funnel campanulate, 2" (50mm) long x 2.8" (70mm) wide, with 5 wavy-edged lobes. Color strong red (53B) in bud, opening inside and out with broad, light pink (49C) margins, blending to pale greenish yellow (10D) towards center; strong red (53C) basal blotch extending upwards c 0.6" (15mm) on dorsal lobe, and c 0.2" (5mm) on other lobes. Truss 3.3" (85mm) high x 5.5" (140mm) wide. Lvs held 2 years, 3.8" x 2" (95 x 50mm), elliptic, broadly acute apex, rounded base, flat margins; hairless; dull and dark yellowish green (139A) above. Shrub 1.5' (0.5m) high x 2.5' (0.8m) wide in 8 years; dense habit. Plant hardy to at least 5°F (-15°C). Late April.

(r) 'Burgundy Mist':  Elepidote rhododendron: 'Midnight Mystique' (s) X 'Jonathan Shaw'. H (1999), G (2004), N (2006), and REG (2008): Jim Barlup, Bellevue, WA. Fls 17/ball truss, broadly funnel-shaped, 1.8" (45mm) long x 3" (75mm) wide, with 5 frilly-edged lobes. Color deep reddish purple (77A) in bud, opening inside light purple (77D) with a margin of deep reddish purple (77A), c 0.5" (15mm) wide, and with a deep purplish red (61A) flare, extending c 0.25" (6mm) from base and changing to dark red (183B) spots extending another 0.8" (20mm) from base; outside deep reddish purple (77A) with deep purplish red (61A) midribs and a ring c 0.8" (20mm) wide at base. Truss 4.5" (115mm) high x 5" (125mm) wide. Lvs held 2 years, 5" x 2.1" (125 x 55mm), elliptic, broadly acute apex, rounded base, flat margins; hairless; semi-glossy and moderate olive green (147A) above. Shrub 3' (0.9m) high x 4' (1.2m) wide in 9 years; intermediate habit. Plant hardy to at least 0°F (-18°C). Late May.

(r) 'Dorothy Bishop':  Elepidote rhododendron: 'Hachmann's Charmant' (s) X 'Lem's Cameo'. H (1996), G (2001), N (2008), and REG (2008): Jim Barlup, Bellevue, WA. Fls 19/ball truss, broadly funnel-shaped, 3" (75mm) long x 3.2" (80mm) wide, with 5 frilly-edged lobes. Color deep red (60A) in bud, opening inside to a blend of strong purplish pink (68B) and yellowish white (155D), with the white extending from the base to within c 0.5" (15mm) of the (68B) border; outside strong purplish pink (68B) with yellowish white (155D) extending upwards c 0.5" (15mm) from the base; spotted dorsal flare of grayish red (184A) extending c 0.8" (20mm) from base and additional spotting of moderate purplish red (184D) extending another 0.8" (20mm). Truss 5.8" (145mm) high x 5.5" (140mm) wide. Calyx lobes 1" (25mm) long, grayish red (184A), blend- ing to yellowish white (155D) with strong purplish pink (68B) tips. Lvs held 2 years, 4.2" x 1.9" (105 x 45mm), elliptic, broadly acute apex, rounded base, flat margins; hairless; dull and moderate olive green (147A) above. Shrub 4.5' (1.4m) high x 6' (1.8m) wide in 12 years; intermediate habit. Plant hardy to at least 0°F (-18°C). Late May.

(r) 'Frostlight':  Elepidote rhododendron: 'Janet Blair' (s) X 'Recital'. H (1996), G (2001), N (2008), and REG (2008): Jim Barlup, Bellevue, WA. Fls 18/ball truss, broadly funnel-shaped, 2.2" (55mm) long x 3" (75mm) wide, with 7 wavy-edged lobes. Color pale yellow (11D) in bud, opening inside and out yellowish white (155D), lightly tinged pale greenish yellow on dorsal lobes; basal rays of moderate red (181B), some extending as far as 0.9" (20mm) from base. Truss 6" (150mm) high x 6" (150mm) wide. Calyx lobes 1.5" (40mm) long, pale greenish yellow (10D) fading to yellowish white (155D) with a moderate red (181B) tinge extending c 0.5" (15mm) from base. Lvs held 2 years, 4.2" x 2.2" (105 x 55mm), elliptic, broadly acute apex, rounded base, wavy margins; hairless; dull and moderate olive green (147A) above. Shrub 4' (1.2m) high x 5' (1.5m) wide in 12 years; intermediate habit. Plant hardy to at least 0°F (-18°C). Mid May.

(r) 'Maris':  Elepidote rhododendron: 'Independence Day' (s) X 'Elegant Touch'. H (1998), G (2004), N (2008), and REG (2008): Jim Barlup, Bellevue, WA. Fls 18/ball truss, saucer-shaped, 1.8" (45mm) long x 3" (75mm) wide, with 5 frilly-edged lobes. Color strong purplish red (61B) in bud, opening inside and out very pale purple (69A) blending to slightly darker edges of deep purplish pink (70C), with the outside having strong reddish purple (70B) mid veins; spotted dorsal flare of moderate purplish red (184C) extending 1.2" (30mm) from base. Truss 5.5" (140mm) high x 5.5" (140mm) wide. Lvs held 2 years, 4.5" x 2" (115 x 50mm), elliptic, broadly acute apex, rounded base, down-curved margins; hairless; dull and moderate olive green (147A) above. Shrub 3' (0.9m) high x 3.5' (1.1m) wide in 10 years; intermediate habit. Plant hardy to at least 0°F (-18°C). Late May.

(r) 'Meela':  Elepidote rhododendron: 'Amber Touch' (s) X 'Recital'. H(1996), G (2000), N (2008), and REG (2008): Jim Barlup, Bellevue, WA. Fls 17/ball truss, funnel-shaped, 1.5" (40mm) long x 2.2" (55mm) wide, with 7 wavy-edged lobes; lightly scented. Color deep pink (50B) in bud, opening throughout brilliant yellow (10A), fading to light yellow (10C) on outer edges; unmarked. Truss 4.5" (115mm) high x 4.5" (115mm) wide. Lvs held 2 years, 3.2" x 1.5" (80 x 40mm), elliptic, broadly acute apex, rounded base, flat margins; hairless; semi-glossy and moderate olive green (147A) above. Shrub 3' (0.9m) high x 3.5' (1.1m) wide in 8 years; intermediate habit. Plant hardy to at least 5°F (-15°C). Late May.

(r) 'Pecos Dawn':  Elepidote rhododendron: 'Amber Touch' (s) X 'Rocky Point'. H (1996), G (2001), N (2007), and REG (2008): Jim Barlup, Bellevue, WA. Fls 17/ball truss, broadly funnel-shaped, 2.2" (55mm) long x 3.5" (90mm) wide, with 7 wavy-edged lobes. Color opening inside pale greenish yellow (13D) with deeper shade of light yellow (14D) on the dorsal lobes, tinged strong pink (48C) on tips, and with pale orange yellow (165D) veining on all lobes, extending from base to tip, also with strong red (53C) nectar pouches extending ¼ of the distance around the base; outside similar but without the (48C) tingeing at tips; heavy strong red (53B) spotting on three dorsal lobes extending 2" (50mm) from base to tips. Truss 5.5" (140mm) high x 6" (150mm) wide. Lvs held 2 years, 4.2" x 1.5" (105 x 40mm), oblong, broadly acute apex, rounded base, flat margins; hairless; glossy and moderate olive green (147A) above. Shrub 3.5' (1.1m) high x 5' (1.5m) wide in 12 years; intermediate habit. Plant hardy to at least 5°F (-15°C). Mid May.

(r) 'Plum Wild':  Elepidote rhododendron: 'Jonathan Shaw' (s) X 'Plum High'. H (2000), G (2004), N (2006), and REG (2008): Jim Barlup, Bellevue, WA. Fls 19/ball truss, broadly funnel-shaped, 1.5" (40mm) long x 2.2" (55mm) wide, with 5 wavy-edged lobes. Color dark red (59A) in bud, opening inside deep purplish red (61A) with a slightly darker edging of dark red (59A) and a dorsal flare of dark red (187A) spots extending c 1" (25mm) from the base; outside deep purplish red (61A). Truss 3" (75mm) high x 4" (100mm) wide. Lvs held 2 years, 5" x c 2" (125 x 50mm), elliptic, broadly acute apex, rounded base, flat margins; hairless; dull and moderate olive green (147A) above. Shrub 3.5' (1.1m) high x 3.5' (1.1m) wide in 8 years; intermediate habit. Plant hardy to at least 0°F (-18°C). Late May.

(r) 'Sun Stream':  Elepidote rhododendron: 'Nancy Evans' (s) X 'Lem's Tangerine'. H (2000), G (2004), N (2007), and REG (2008): Jim Barlup, Bellevue, WA. Fls 17/dome truss, openly funnel-shaped, 2.5" (65mm) long x 3.2" (80mm) wide, with 5 wavy-edged lobes. Color vivid red (45A) in bud, opening inside and out pale orange yellow (16D) on outer edges, shading to a slightly darker light orange yellow (16C) towards the center, with light yellowish pink (29C) veining on all lobes; strong red (47B) nectar pouches extending c 0.4" (10mm) from the base. Calyx lobes 1" (25mm) long, pale orange yellow (16D) with strong red (47B) edging. Truss 5.5" (140mm) high x 6" (150mm) wide. Lvs held 2 years, 4.2" x 2.2" (105 x 55mm), elliptic, broadly acute apex, rounded base, flat margins; hairless; semi-glossy and moderate olive green (147A) above. Shrub 3.5' (1.1m) high x 3.5' (1.1m) wide in 8 years; intermediate habit. Plant hardy to at least 5°F (-15°C). Mid May.

(r) 'Twilight Fire':  Elepidote rhododendron: 'Maricela' (s) X {'Lem's Cameo' x ([( 'Lem's Cameo' x 'Ken Janeck') x 'Brandt's Tropicana'] x ['Whopper' x 'Brandt's Tropicana'])}. H (1998), G (2002), N (2008), and REG (2008): Jim Barlup, Bellevue, WA. Fls 12/dome truss, broadly funnel-shaped, 2.2" (55mm) long x 3.5" (90mm) wide, with 7 frilly-edged lobes. Color deep red (53A) in bud, opening inside strong reddish orange (42B) with darker rays of strong red (46A) extending along midrib from base to outer edge on each lobe; outside similar; basal marking of deep red (185A), c 0.4" (10mm) wide on dorsal lobe and c 0.1" (3mm) wide on other lobes; dorsal flare c 1.5" (40mm) long of moderate red (185B) spots. Calyx lobes irregular, some as long as 1.8" (45mm); strong reddish orange (42B) with a deep red (185A) base. Truss 5.5" (140mm) high x 7" (175mm) wide. Lvs held 2 years, 5" x 2" (125 x 50mm), elliptic, broadly acute apex, rounded base, flat margins; hairless; dull and dark yellowish green (139A) above. Shrub 3' (0.9m) high x 3' (0.9m) wide in 6 years; intermediate habit. Plant hardy to at least 10°F (-12°C). Mid May. (Synonym: 'Orange 2002')

(r) 'Violet Dreams':  Elepidote rhododendron: 'Plum High' (s) X 'Jonathan Shaw'. H (1997), G (2001), N (2007), and REG (2008): Jim Barlup, Bellevue, WA. Fls 27/ball truss, broadly funnel-shaped, 1.8" (45mm) long x 2.5" (65mm) wide, with 5 wavy-edged lobes. Color deep purplish red (71A) in bud, opening inside very pale purple (76D) extending c 1.5" (40mm) from base, edged with strong purple (77B); outside strong purple (77B) with deep purplish red (77A) on midribs; two deep purplish red (77A) streaks, c 0.5" (15mm) long at base of dorsal lobe, becoming a flare of dark purple (79A) spots extending c1.3" (30mm) from base. Truss 5" (125mm) high x 5.5" (140mm) wide. Lvs held 2 years, 5.8" x 2.5" (145 x 65mm), elliptic, broadly acute apex, rounded base, flat margins; hair- less; semi-glossy and moderate olive green (147A) above. Shrub 3.5' (1.1m) high x 4.5' (1.4m) wide in 11 years; intermediate habit. Plant hardy to at least 0°F (-18°C). Late May.