JARS v61n1 - American Rhododendron Society Plant Registry

American Rhododendron Society Plant Registry

Introduction : The following rhododendron and azalea names were approved and added to the International Rhododendron Register prior to November 15, 2006 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 rhododendron, (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 25mm (1").

(r) 'Britt's Treasure': Elepidote rhododendron: 'President Roosevelt' (s) X 'Grandma's Hat'. H and G: Britt and Jean Smith, Kent, WA; N (2006) and REG (2006): Stuart Imrie, Bonney Lake, WA; I (2006): Lake Tapps Nursery, Bonney Lake, WA. Fls 16-17/ball truss, openly funnel-shaped; 2" (50mm) long x 2.5" (65mm) wide, with 5 wavy-edged lobes. Color vivid purplish red (57B) in bud, opening inside white with vivid red (57A) margins and a small blotch of vivid red (57A) spots on dorsal lobe; outside vivid purplish red (57B). Truss 5.5" (140mm) high x 6" (150mm) wide. Lvs 4.5" x 1.8" (115 x 45mm), oblong, broadly acute apex, rounded base, upcurved margins; dull and dark green (136A) above. Shrub 4' (1.2m) high x 3' (0.9m) wide in 10 years; open habit. Plant and bud hardy to at least 0°F (-18°C). Mid April. (Awards at Tacoma Chapter ARS, Spring Fair, April 23, 2006: (1) Best hybrid truss in show; (2) Best red in show; (3) Best in show.)

(r) 'Bubblegum': Lepidote rhododendron: 'Weston's Aglo' treated in vitro with colchicine. Treated (1994), G (1997), N (2006), and REG (2006): Briggs Nursery, Elma, WA. Fls 7-9/lax truss, openly funnel-shaped; 1.5" (40mm) long x 2.2" (55mm) wide, with 5 wavy-edged lobes. Color strong purplish red (58C) in bud, opening inside strong purplish pink (63C) with a deep purplish red (59B) dorsal blotch; outside strong purplish pink (62A). Truss 2" (50mm) high x 3.5" (90mm) wide. Lvs held 2 years, elliptic, broadly acute apex, cuneate base, flat and down curved margins; semi-glossy and moderate olive green (146A) above; scaly. Shrub 3' (0.9m) high, 4' (1.2m) wide in 10 years; open habit. Plant hardy to at least -20°F (-29°C). Late March-early April. (Note: Plant confirmed to be tetraploid after testing at North Carolina State University by Tom Ranney.)

(a) 'Deni's Delight': Deciduous azalea: Seedling from Choptank River Group. Seed collected (c 1988), and G (1992): David Dethero, Zirconia, NC; N (2006), and REG (2006): Bob Stelloh, Hendersonville, NC. Fls 8-25/dome truss, elongated tubular funnel-shaped, with exserted moderate yellowish pink (38B) stamens and pistil; corolla tube with glandular hairs; 1.5" (40mm) long x 1.8" (45mm) wide, with 5 wavy-edged lobes; strongly scented. Color light greenish yellow (8C) in bud with tips moderate yellowish pink (38B); opening inside light greenish yellow (8C) with midribs darker yellow; outside light greenish yellow (8C) with midribs and tips moderate yellowish pink (38B) and top of corolla tube deep yellowish pink (39B). Calyx lobes c 0.05" (1.5mm) long, strong yellow green (145B). Truss 3" (75mm) high x 4" (100mm) wide. Lvs 1.8"-2" x c 1" (45-50 x 25mm), mostly elliptic (some obovate), broadly acute apex, cuneate base, flat margins; dull and strong yellow green (144A) above; pedicels bristly; new growth deep red (53A). Shrub 5'-6.7' (1.5-2m) high x 4.5' (1.4m) wide in c 18 years; intermediate habit. Plant hardy to at least 0°F (-18°C). Late April.

(a) 'Earl's Gold': Deciduous azalea: R. austrinum , open-pollinated. S (c 1972), G (c 1979), N (2006), and REG (2006): Earl A. Sommerville, Marietta, GA. I (2003): RareFind Nursery, Jackson, NJ. Fls 16/ball truss, elongated tubular funnel-shaped, with exserted stamens and pistil; 2" (50mm) long x 1.8" (45mm) wide, with 5 wavy-edged lobes; lightly scented. Color strong orange yellow (22A) in bud, opening inside vivid yellow (15A) with a strong orange yellow (22A) blotch; outside tube moderate reddish orange (33A). Calyx lobes c 0.6" (15mm) long, light yellow (160B). Truss 3" (75mm) high x 4.5" (115mm) wide. Lvs 3.5" x 1.5" (90 x 40mm), obovate, obtuse apex, cuneate base, down curved margins; dull and strong yellow green (143C) above. Shrub 15' (4.5m) high x 8' (2.4m) wide in c 25 years; open habit. Plant hardy to at least -5°F (-21°C). Early.

(a) 'Ed Egan': Deciduous azalea: Parentage unknown, wild-collected in central GA. S (c1980), G (c1985), N (2006), and REG (2006): Earl A. Sommerville, Marietta, GA. Fls 52/ball truss, elongated tubular funnel-shaped, with exserted stamens and pistil; 1.8" (45mm) long x c 1.5" (40mm) wide, with 5 wavy-edged lobes; moderately scented. Color moderate orange (170D) in bud, opening light yellow (18A) inside with a vivid yellow (14B) dorsal blotch; outside light yellow (18A). Calyx lobes 0.25" (6mm) long, strong yellow green (144C). Truss 3.5" (90mm) high x 4.5" (115mm) wide. Lvs 2" x 1" (50 x 25mm), elliptic, broadly acute apex, cuneate base, flat margins; semi-glossy and moderate yellowish green (138A) above. Shrub 6' (1.8m) high x 4' (1.2m) wide in c 18 years; intermediate habit. Plant hardy to at least -5°F (-21°C). Early.

(v) 'Enny': Vireya (lepidote) rhododendron: ( R. zoelleri x R. leucogigas ) (s) X 'Doctor Herman Sleuman'. H (1995), G, N, and REG (2006): R.A. (Mitch) Mitchell, Volcano, HI. Fls 5/flat truss, openly funnel-shaped, 4" (100mm) long x 4.2" (105mm) wide, with 5 wavy-edged lobes. Color brilliant yellow (21C) inside corolla, and brilliant orange yellow (21B) outside; pink at edge of lobes with pink markings on tube, inside and out. Truss 6" (150mm) high x 7" (175mm) wide. Lvs orbicular, obtuse apex, rounded base, flat margins; semi-glossy and deep yellowish green (141A) above; scaly below. Shrub 6' (1.8m) high x 3' (0.9m) wide in 10 years; intermediate habit. Plant and bud hardy to at least 40°F (4°C). Mid April.

(r) 'Glady': Elepidote rhododendron: 'Full Moon' (s) X 'Mrs. Furnivall'. H: Willard Swenson, Eugene, OR; G (1985), N, and REG (2006): Jack Olson, Fall Creek, OR. Fls 18/dome truss, broadly funnel-shaped; 1.2" (30mm) long x 3" (75mm) wide, with 5 flat-edged lobes. Color pale yellow green (4D) throughout, with two small dorsal flares of strong greenish yellow spots. Truss 4" (100mm) high x 5" (125mm) wide. Lvs 6" x 2.5" (150x65mm), obovate, obtuse apex, rounded base, down curved margins; semi-glossy and dark green (136A) above. Shrub 5' (1.5m) high x 5' (1.5m) wide in 8 years; intermediate habit. Mid May. (Awards at 2006 ARS flower shows: 1. Best American Hybrid at Portland; 2. Best American Hybrid and Best Yellow Hybrid at Salem; 3. Best Yellow Hybrid at Corvallis)

(r) 'Jim's Blueberry Jam': Elepidote rhododendron: ( R. yakushimanum 'Koichiro Wada' x 'Burgundy') (s) X 'Blue Pacific'. H (1988), G (1994), and REG (2006): Frank Fujioka, Freeland, WA; N (2006): Suzanne Ramsey, Greenbank, WA; I (2007): Meerkerk Gardens, Greenbank, WA. Fls 15/dome truss, broadly funnel-shaped; 2.5" (65mm) long x 4" (100mm) wide, with 5 wavy edged lobes. Color vivid reddish purple (78A) in bud, opening inside vivid reddish purple (78A) in throat, shading to strong purple (80B), and then to a 0.4"-0.6" (10-15mm) wide margin of vivid purple (87A), with a dark grayish reddish brown (200A) dorsal blotch; outside vivid reddish purple (78A) with a vivid purple (82A) margin c 0.4"-0.6" (10-15mm) wide. Truss 5" (125mm) high x 6" (150mm) wide. Lvs held 3 years, 8" x 2.5" (200 x 65mm), elliptic, broadly acute apex, cuneate base, slightly down curved margins; semi-glossy and dark green (135A) above. Shrub 7' (2.1m) high x 4.5' (1.4m) wide in 10 years; intermediate habit. Plant and bud hardy to at least 10°F (-12°C). Early May.

(r) 'John Winberg': Elepidote rhododendron. ('Mrs. Donald G. Graham' x 'Purple Splendour') (s) X 'Blue Hawaii'. H (1999), G (2004), N (2005), and REG (2006): Elsie M. Watson, Kirkland, WA. Fls 16/conical truss, openly funnel-shaped; 2.5" (65mm) long x 3" (75mm) wide, with 5 wavy-edged lobes. Color light purple (78C) in bud, opening inside very pale purple (69B), with a dark red (59A), blotch consisting of three rays at the base of the dorsal lobe; outside light purple (80C). Truss 4" (100mm) high x 7" (175mm) wide. Lvs held 2 years, 4.2" x 1.5" (105 x 40mm), elliptic, broadly acute apex, cuneate base, flat margins; dull and moderate olive green (137B) above; hairless. Shrub 4' (1.2m) high x 3' (0.9m) wide in 7 years; dense habit. Plant and bud hardy to at least 15°F (-9°C). Early April.

(a) 'Memory of James Thompson': Deciduous azalea: Parentage unknown. S (c 1970): James Thompson, Mobile, Al; G (c 1975), N (2006), and REG (2006): Earl A. Sommerville, Marietta, GA; I (2006): Mountain Shadow Nursery, Olympia, WA. Fls 13/flat truss, elongated tubular funnel-shaped, with exserted stamens and pistil; 2.2" (55mm) long x 2.2" (55mm) wide, with 5 wavy-edged lobes. Color strong orange (25B) in bud, opening vivid yellow (15A) throughout, with a strong orange (24A) dorsal blotch. Calyx lobes c0.6" (15mm) long, strong yellow green (145A). Truss 4" (100mm) high x 5" (125mm) wide. Lvs 3.5" x 1.5" (90 x 40mm), obovate, broadly acute apex, oblique base, upcurved margins; semi-glossy and strong yellow green (144C) above. Shrub 10' (3m) high x 15' (4.5m) wide in c 30 years; open habit. Plant hardy to at least -5°F (-21°C). Early April.

(r) 'Nishna': Lepidote rhododendron: 'Weston's Aglo' (s) X selection from R. mucronulatum . H (1996), G, N, and REG (2006): David Purdy, Omaha, NE. Fls 1-4/truss, broadly funnel-shaped; 1" (25mm) long x 1" (25mm) wide, with 5 wavy-edged lobes. Color grayish purplish red (N77D) in bud, opening inside and out very light purple (75C) at margins, fading to very pale purple (75D) in center; small, faint green dorsal blotch. Lvs 1.2" x 0.8" (30x20mm), elliptic, broadly acute apex, rounded base, flat margins; dull and grayish green above. Shrub 1.7' (0.5m) high, broader than tall in 10 years; intermediate habit; mostly deciduous. Plant and bud hardy to at least -15°F (-26°C). Mid April.

(r) 'Palomino': Elepidote rhododendron: Parentage unknown; possibly a Dexter hybrid. I (pre 1980): Elmer Morris, Hillside Rhododendron Gardens, Manasquan, NJ; REG (2006): Jerome (Jerry) Van De Sande, Neptune, NJ. Fls 20/conical truss, broadly funnel-shaped; 2.4" (60mm) long x 3.2" (80mm) wide, with 6 wavy-edged lobes. Color light purple (75B) in bud, opening inside and out ivory white tinged very light purple (75C-D) at lobe margins; with a prominent spotted dorsal blotch of light purple (78C) and strong greenish yellow (153B). Truss 7" (175mm) high x 6" (150mm) wide. Lvs elliptic, broadly acute apex, oblique base, down curved margins; semi-glossy and moderate yellow green (137B) above; hairless. Shrub 6' (1.8m) high x 6' (1.8m) wide in 10 years; intermediate habit. Plant and bud hardy to at least -10°F (-23°C). Mid May.

(v) 'Perky Pink': Vireya (lepidote) rhododendron: R. konori (s) X ('Doctor Herman Sleumer' x [ R. macgregoriae x R. aurigeranum ]). H (1999): R.A. Mitchell, Volcano, HI; G (2006), N, and REG (2006): Sherla Bertelmann, Kea'au, HI; I (2006): Pacific Island Nursery, Kea'au, HI. Fls 7/flat truss, tubular funnel-shaped; 3" (75mm) long x 3.2" (80mm) wide, with 7 wavy-edged lobes; moderately scented. Color of interior deep purplish pink (58A) margins shading to pale yellow (8D) center; outside moderate purplish pink (65A) merging with pale yellow (8D) towards base which is very lightly tinged moderate purplish pink (65A). Truss 4" (100mm) high x 7.5" (190mm) wide. Lvs 4.2" x 3" (105mm x 75mm), oblong, acute apex, rounded base, upcurved margins; glossy and dark yellowish green (139A) above, with scales on leaf blades, above and below. Shrub 4' (1.2m) high x 2.5' (0.75m) wide in 6 years; intermediate habit. Plant hardy to at least 40°F (4°C). April-May.

(a) 'Pink Daddy': Evergreen azalea: 'Chinzan' (known locally as 'Chinsoy') (s) X unknown. H, G (1994), N (2005), REG (2006): Mark Phillips, Cary, NC. Fls 3-4/truss, 1.5" (40mm) long x 2" (50mm) wide, with 5 wavy-edged lobes. Color dark rose pink in bud, opening rose pink throughout, with dark rose blotches on three dorsal lobes. Calyx lobes c 0.3" (6mm) long, rose pink. Lvs 1" x 0.5" (25 x 12mm), elliptic, acute apex, flat margins; glossy and dark green above. Shrub 5' (1.5m) high x 5' (1.5m) wide in 10 years; dense habit. Plant and bud hardy to at least 12°F (-11°C). Late April-early May.

(r) 'Prism': Elepidote rhododendron: 'Nancy Evans' (s) X 'Tamarindos'. H (c 2000) and G (2005): Nolan Blansit, Cottage Grove, OR; N (2006) and REG (2006): Jack Olson, Fall Creek, OR. Fls 20/conical truss, openly funnel-shaped; c 3" (75mm) long x 3.5" (90mm) wide, with 5 frilly-edged lobes; lightly scented. Color deep purplish red (71A) in bud, opening inside strong purplish red (72A) at margins, shading through moderate yellow (162B) to a deep purplish red (61A) basal blotch, with large conspicuous dark red (59A) dorsal spots; outside strong purplish red (72A) and strong reddish purple (72B). Truss 7" (175mm) high x 8" (200mm) wide. Lvs held 3 years, 7" x 2.5" (175 x 65mm), oblong, broadly acute apex, oblique base, wavy margins; semi-glossy and dark bluish green (162B) above; hairless. Shrub 5' (1.5m) high x 5' (1.5m) wide in 6 years; intermediate habit. Mid May. (Awarded Best New American Hybrid at the Florence, OR Rhododendron Festival.)

(v) 'Toyama Yellow': Vireya (lepidote) rhododendron: R. laetum , open pollinated. G (2003) from seed provided by Mrs. Toyama, N (2003), and REG (2006): Sherla Bertelmann, Kea'au, HI; I (2006): Pacific Island Nursery, Kea'au, HI. Fls 6/open dome truss, tubular funnel-shaped; 3.5" (90mm) long x 4.2" (105mm) wide, with 5 flat-edged lobes; moderately scented. Color inside vivid yellow (16A) becoming strong orange yellow (17A) in center; outside vivid yellow (15A) becoming light yellow (18A) at base; unmarked; color deepens as flowers mature. Truss 6" (150mm) high x 8.5" (215mm) wide. Lvs 4.8" x 2.5" (120 x 65mm), elliptic, acuminate apex, rounded base, upcurved margins; semi-glossy and moderate olive green (137A) above at maturity. Shrub 4' (1.2m) high x 3' (0.9m) wide in 5 years; intermediate habit. Plant hardy to at least 40°F (4°C). Flowering about four times per year, heaviest in spring and autumn.

(a) 'Verdie Sommerville': Deciduous azalea: 'Strawberry Ice' X R. flammeum . H (c 1985), G (1988), N (2006), and REG (2006): Earl A. Sommerville, Marietta, GA; I (2006): Mountain Shadow Nursery, Olympia, WA. Fls 13/flat truss, tubular funnel-shaped, with exserted stamens and pistil; 2" (50mm) long x 2.2" (55mm) wide, with 5 frilly-edged lobes. Color vivid reddish orange (42C) in bud, opening inside vivid yellowish pink (30C) with a vivid orange (28B) streak extending from the base to the apex of each lobe; outside vivid reddish orange (33B) with a strong red (39A) tube. Calyx lobes c 0.8" (20mm) long, strong yellow green (l44B). Truss 2.5" (65mm) high x 4.4" (110mm) wide. Lvs 2.8" x 1.5" (70 x 40mm), obovate, broadly acute apex, cuneate base, flat margins; semi-glossy and strong yellow green (144A) above. Shrub 8' (2.4m) high X 5' (1.5m) wide in c 25 years; intermediate habit. Plant hardy to at least-5°F (-21°C). Mid April.

(r) 'Yasmin': Elepidote rhododendron. ( R. calophytum X Sarita Loder Group) (s) X R. macabeanum . H (1969}, G (1984), N, and REG (2006): Elsie M. Watson, Kirkland, WA. Fls of heavy substance, 18/ball truss, open-campanulate; 1.8" (45mm) long x 2.5" (65mm) wide, with 7 wavy-edged lobes. Color pale purplish pink (56D) in bud, opening and fading to white inside with dark red (59A) basal flares 0.4"-0.6" (10-15mm) long; outside tinged randomly with purplish pink. Truss 5.5" (140mm) high x 4.5" (11 )mm) wide. Lvs held 2 years, 9.2" x 3.5'' (230 x 90mm), elliptic, broadly acute apex, rounded base, flat margins; glossy, hairless, and dark yellowish green (139A) above, with grayish yellow green (19SB) felted hairs below. Shrub 5' (1.5m) high x 5' (1.5m) wide in c 10 years; habit upright and spreading; free-flowering. Plant and bud hardy to at least 8°F (-l3°C). Late March.