JARS v63n3 - 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 May 31, 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 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 1" (25mm).

(a) 'Allyson Ruth': Evergreen azalea: 'Myu-no-tsuki' (s) X 'Red Slippers'. H (1992): Joe H. Coleman, Lithonia, GA; G (1997) and REG (2009): Julia R. Hindle, Kannapolis, NC; N (2008): Ruth Holbrook, Charlotte, NC. Fls single, 2/flat truss, openly funnel-shaped, 2" (50mm) long x 2.8" (70mm) wide, with 5 flat-edged lobes. Color white tinged with light purplish pink (65B) in bud, opening inside white with a broad margin tinged pale purplish pink (56A-C) and marked with four rows of light yellow green (145C) spots on the dorsal lobe fanning upwards from the base; outside light purplish pink (65B) at base, fading to mostly white at middle of petals, and slightly blushed pale purplish pink (56C) at margins; stamens and pistil dark pink. Calyx lobes c 0.1" (3mm) long, moderate yellow green (139C). Lvs held 2 years; 1.8" x 0.6" (45 x 15mm), elliptic, broadly acute apex, cuneate to rounded base, flat margins; moderate olive green (137A) above; silvery hairs on underside of young lvs. Shrub 4' (1.2m) high x 3.5' (1.1m) wide in 10 years; open habit. Plant and bud hardy to at least 10°F (-12°C). Mid April. (Note: Awarded blue ribbon at 2004 Piedmont Chapter, Azalea Society of America, Unnamed Evergreen Azalea Seedling class.)

(r) 'Boomer': Elepidote rhododendron: R. hyperythrum (s) X 'Sham's Ruby'. H (1990): John Thornton, Franklinton, LA; G (1995), N, and REG (2009): Len Miller, Grove, OK. Fls 12/conical truss, broadly funnel-shaped, c 1.5" (40mm) long x 2" (50mm) wide, with 5 wavy-edged lobes. Color red in bud, opening inside pink, the dorsal lobe with maroon stippling; outside opening pink. Lvs held 3 years, 4.5" x 2" (115 x 50mm), oblong, broadly acute apex, rounded base, down-curved margins; hairless; glossy and dark green above. Shrub 7' (2.1m) high x 7' (2.1m) wide in 15 years; dense habit; heat tolerant. Plant hardy to at least -10°F (-23°C); buds, -5 F (-21°C). Mid April.

(r) 'Braxton': Elepidote rhododendron: R. hyperythrum (s) X 'Scintillation'. H (1993): John Thornton, Franklinton, LA; G (1995), N (1996), and REG (2009): Len Miller, Grove, OK. Fls 11/truss, broadly funnel-shaped, c 1.5" (40mm) long x 3" (75mm) wide, with 5 wavy-edged lobes. Color pink in bud, opening inside pink, fading to white, with maroon stippling on dorsal lobe; outside light pink, fading to white. Truss 5" (125mm) high x 6" (150mm) wide. Lvs held 3 years, 4" x 2" (100 x 50mm), oblong, broadly acute apex, rounded base, down-curved margins; hairless; glossy and dark green above. Shrub 5' (1.5m) high x 7' (2.1m) wide in 14 years; dense habit and heat tolerant. Plant hardy to at least -12°F (-24°C); buds, -5 F (-21°C). Mid April.

(v) 'Hawaii Sunrise': Vireya (lepidote) rhododendron: ([( R. macgregoriae x R. laetum ) x R. saxifragoides ] F2) X self. H (1999): William Moyles, Oakland, CA; G (2003) and N (2008): Richard Marques and Sherla Bertelmann, Kea'au, HI; I (2008): Pacific Island Nursery, Kea'au, HI; REG (2009): Richard Kruppa, Volcano, HI. Fls 6-9/flat truss, tubular funnel-shaped, 1.8" (45mm) long x c 2" (50mm) wide, with 5 flat-edged lobes. Color moderate purplish red (64A) in bud, opening inside brilliant greenish yellow (4A) at base of tube, and blending into pale purplish pink (56B) before reaching margins; outside light greenish yellow (3C) at base of tube and changing gradually to orange-yellow before reaching margins; no markings; stigma and style: light green; filament: yellow; anther: yellowish brown. Truss 2" (50mm) high x 5" (125mm) wide. Lvs 3.4"-3.6" x 0.8"-1.4" (85-90 x 20-35mm), elliptic, either broadly acute or acuminate apex, cuneate base, upcurved margins; glossy and moderate olive green (137A) above; no indumentum visible. Shrub 20"-24" (0.5-0.6m) high x 18"-20" (0.45-0.5m) wide in 5 years; intermediate habit. Plant and bud hardy to at least 40°F (4°C). Flowering 3-4 times per year between May and December.

(v) 'Heart of Pineapple': Vireya (lepidote) rhododendron: ([( R. macgregoriae x R. laetum ) x R. saxifragoides ] F2) X self). H (1999): William Moyles, Oakland, CA; G (2004) and N (2009): Richard Marques and Sherla Bertelmann, Kea'au, HI; I (2008): Pacific Island Nursery, Kea'au, HI; REG (2009): Richard Kruppa, Volcano, HI. Fls 4-5/flat truss, tubular funnel-shaped, 2" (50mm) long x c 0.7"-1.2" (20-30mm) wide, with 5 flat-edged lobes. Color strong yellow green (145A) in bud, opening inside and out light greenish yellow (8B) at base, fading to much lighter pale greenish yellow (9D) at margins, with a barely discernible pink tinge on petals; a fine green line extending from base to half way up the petals; stigma and style: green; filament: yellow; anther: brownish yellow. Truss 4"-4.5" (100-115mm) high x 2.5" (65mm) wide. Lvs 1.5"-2" x c 0.8" (40-50 x 20mm), elliptic, acuminate apex, cuneate base, upcurved margins; glossy and moderate olive green (137B) above; no indumentum visible. Shrub 18" (0.45m) high x 12" (0.3m) wide in 5 years; dense habit. Plant and bud hardy to at least 40°F (4°C). Flowering 2-4 times per year between May and December.

(r) 'Honey Creek': Elepidote rhododendron: R. hyperythrum (s) X 'Princess Elizabeth'. H (1993): John Thornton, Franklinton, LA; G (2003), N (2003), and REG (2009): Len Miller, Grove, OK; to be I (2010): Briggs Nursery, Elma, WA. Fls 11/ball truss, broadly funnel-shaped, c 1.5" (40mm) long x 2" (50mm) wide, with 5 wavy-edged lobes. Color red in bud, opening inside pink, shading lighter in throat, the dorsal lobe with maroon stippling; outside opening a deeper shade of pink. Lvs held 3 years, 5" x 2" (125 x 50mm), oblong, acute apex, rounded base, down-curved margins; hairless; semi-glossy and dark green above. Shrub 6' (1.8m) high x 8' (2.4m) wide in 12 years; dense habit; heat tolerant. Plant hardy to at least -10°F (-23°C); buds, -5°F (-21°C). Mid-late April.

(v) 'Kilauea Kid': Vireya (lepidote) rhododendron: ([( R. macgregoriae x R. laetum ) x R. saxifragoides ] F2) X self. H (1999): William Moyles, Oakland, CA; G (2003) and N (2008): Richard Marques and Sherla Bertelmann, Kea'au, HI; I (2008): Pacific Island Nursery, Kea'au, HI; REG (2009): Richard Kruppa, Volcano, HI. Fls 3-5/flat truss, tubular funnel-shaped, 2" (50mm) long x 2.5" (65mm) wide, with 5 flat-edged lobes. Color strong purplish red (60B) in bud, opening inside vivid reddish orange (32A) at margin shading to strong yellowish pink and then paler in the throat; outside similar; no markings; filament: orange; anther: dark orange; stigma: orange; style: yellowish green. Truss 2.5"-3" (65-75mm) high x 3.5"-4.5" (90-115mm) wide. Lvs 2.2" x c 1" (55 x 25mm), elliptic, broadly acute apex, cuneate base, upcurved margins; glossy and dark green (132A) above; no indumentum visible. Shrub 19"-21" (0.5m) high x 15"-17" (0.4m) wide in 5 years; intermediate habit. Plant and bud hardy to at least 40°F (4°C). Flowering intermittently, up to 3 months continually, between May and December.

(v) 'Lava Fountain': Vireya (lepidote) rhododendron: 'Sunny' (s) X R. rubineiflorum , dwarf form. H (c 1999): T. Lelliot, Victoria, Australia; G (pre 2004) and N (2009): Richard Marques and Sherla Bertelmann, Kea'au, HI; I (2004): Pacific Island Nursery, Kea'au, HI; REG (2009): Richard Kruppa, Volcano, HI. Fls 3-5/flat truss, tubular funnel-shaped; the face flattens at first and then becomes convex with age; 1.8" (45mm) long x 1.8"-2" (45-50mm) wide, with 6 flat-edged lobes. Color moderate red (183C) in bud, opening inside and out deep yellowish pink (43C) to vivid reddish orange (44C), the tube somewhat lighter than (44C); no markings; filament: white; anther: very dark orange; style: very light green; stigma: reddish orange. Truss 3" (75mm) high x 5"-8" (125-200mm) wide. Mature lvs exhibit two different configurations; small lvs are elliptic with an acute apex and cuneate base, while large lvs are ovate with a broadly acute apex and rounded base; all lvs have slightly upcurved margins. Small lvs are 1" (25mm) long x 0.4" (10mm) wide; large lvs are 1.4" (35mm) long x 0.6" (15mm) wide; all are semi-glossy and dark bluish green (131A) above, with no indumentum visible. Shrub 15" (0.4m) high x 18" (0.45m) wide in 5 years; intermediate habit. Plant and bud hardy to at least 40°F (4°C). Flowering 3-4 times per year for extended periods between May and December.

(a) 'Patsy's Choice': Evergreen azalea: 'Hinodegiri' (s) X open pollinated. H (1985), G, N, and REG (2009): James O. Thornton, Conyers, GA. Fls single, 3/flat truss, tubular funnel-shaped, 1.2" (30mm) long x 1.5" (40mm) wide, with 5 flat-edged lobes. Color strong pink (48C) in bud, opening strong pink (48C) throughout. Calyx lobes c 0.2" (5mm) long, light green. Lvs 0.8" x 0.4" (20 x 10mm), obovate, obtuse apex, cuneate base, flat margins; glossy and mid-green above changing to bronze in winter; hairless. Shrub 4' (1.2m) high x 4' (1.2m) wide in 25 years; dense habit; grows and flowers well in dense shade. Early season.

(r) 'Sooner': Elepidote rhododendron: R. hyperythrum (s) X unknown. H (1993): John Thornton, Franklinton, LA; G, N, and REG (2009): Len Miller, Grove, OK. Fls 10/conical truss, broadly funnel-shaped, 2" (50mm) long x 2.8" (70mm) wide, with 5 wavy-edged lobes. Color pink in bud, opening inside pink with heavy maroon stippling in throat of dorsal lobe; outside pink. Lvs held 3 years, 5" x 1.5" (125 x 40mm), oblong, acute apex, rounded base, down-curved margins; hairless; glossy and dark green above. Shrub 4' (1.2m) high x 5' (1.5m) wide in 12 years; dense habit; heat tolerant. Plant hardy to at least -12°F (-24°C); buds, -5°F (-21°C). Mid April.

(r) 'Stuart's Eye Candy': Elepidote rhododendron: 'Naselle' (s) X 'Hachmann's Polaris'. H, G (2001), N (2009), and REG (2009): Stuart Imrie, Bonney Lake, WA; I (2009): Lake Tapps Rhododendron Nursery, Bonney Lake, WA. Fls 19/ball truss, broadly funnel shaped, 2" (50mm) long x 3.5" (90mm) wide, with 7 frilly-edged lobes. Color vivid red (57A) in bud, opening inside pale greenish yellow (1D) in center of corolla and centers of all lobes, with a broad margin of moderate purplish pink (66D); outside moderate purplish pink (66D); tiny speckles of strong greenish yellow (153B) on dorsal lobe. Calyx lobes 1.5" (40mm) long, vivid purplish red (61C). Truss 5" (125mm) high x 7" (175mm) wide. Lvs held 3 years, 5.2" x 2" (130 x 50mm), elliptic, acute apex, rounded base, flat margins; dull and dark green (136A) above; hairless. Shrub 3' (0.9m) high x 3' (0.9m) wide in 10 years; dense habit. Plant and buds hardy to at least 0°F (-18°C). Early April.

(r) 'Stuart's Treasure': Elepidote rhododendron: 'Lemon Dream' (s) X 'Eunie'. H (2000), G (2003), N, and REG (2009): Stuart Imrie, Bonny Lake, WA; I (2009): Lake Tapps Rhododendron Nursery, Bonney Lake, WA. Fls 15/ball truss, broadly funnel-shaped, 2" (50mm) long x 3.2" (80mm) wide, with 5 wavy-edged lobes. Color brilliant greenish yellow (1A) in bud, opening throughout light greenish yellow (1C); several short, vivid reddish orange (40A) petaloid stamens at base in addition to some normal stamens. Calyx lobes c 0.1" (3mm) long, strong yellow green (43B). Truss 5" (125mm) high x 6" (150mm) wide. Lvs held 3 years, 4.5" x 2.5" (115 x 65mm), obovate, obtuse apex, cuneate base, flat margins; dull and dark bluish green (131A) above; with grayish reddish orange (177C) hairs on underside of mature lvs. Shrub 4' (1.2m) high x 2.5' (0.75m) wide in 10 years; dense habit. Plant and buds hardy to at least 0°F (-18°C). Mid April.

(r) 'Superflimmer': Elepidote rhododendron: Sport from 'Goldflimmer'. S, G (2002), N (2009), and REG (2009): Stuart Imrie, Bonney Lake, WA; I (2010): Lake Tapps Rhododendron Nursery, Bonney Lake, WA. Fls 9/ball truss, saucer-shaped, 1.4" (35mm) long x 2" (50mm) wide, with 5 wavy-edged lobes. Color moderate purplish red (70A) in bud, opening inside light purple (80D) with a speckled deep greenish yellow (153D) dorsal blotch; outside light purple (80C). Truss 2" (50mm) high x 3.5" (90mm) wide. Lvs 4.5" x 1.8" (115 x 45mm), elliptic, broadly acute to acute apex, cuneate base, upcurved margins; dull and dark bluish green to dark green (131A-B) above, variegated with prominent light to pale yellow (8B-D) markings; hairless. Shrub 3' (0.9m) high x 3' (0.9m) wide in 10 years; dense habit. Plant and buds hardy to at least 0°F (-18°C). Late April - May. (Awarded Blue Ribbon at 2008 Tacoma Chapter, ARS truss show.)

(r) 'Tough Buck': Elepidote rhododendron: Unknown (s) X R. hyperythrum . H (1995): John Thornton, Franklinton, LA; G (2004), N (2004), and REG (2009): Len Miller, Grove, OK; to be I (in future): Briggs Nursery, Elma, WA. Fls 11/conical truss, broadly funnel-shaped, c 1.5" (40mm) long x 3" (75mm) wide, with 5 wavy-edged lobes. Color red in bud, opening inside light pink and fading to white, with heavy maroon stippling on dorsal lobe; outside light pink, fading to white. Truss 4.5" (115mm) high x 6" (150mm) wide. Lvs held 3 years, 4" x 2" (100 x 50mm), oblong, acute apex, rounded base, down-curved margins; hairless; semi-glossy and dark green above. Shrub 4' (1.2m) high x 5' (1.5m) wide in 12 years; dense habit; heat tolerant. Plant hardy to at least -12°F (-24°C); buds, -5°F (-21°C). Mid April.

(r) 'Variegated Unique': Elepidote rhododendron: A sport of 'Unique'. S (2000), G (2003), N, and REG (2009): Stuart Imrie, Bonney Lake, WA; to be I: Lake Tapps Rhododendron Nursery, Bonney Lake, WA. Fls 12/ball truss, broadly funnel-shaped, 1.8" (45mm) long x 3" (75mm) wide, with 5 wavy-edged lobes. Color light purplish pink (62C) in bud, opening inside pale greenish yellow (2D), at first lightly tinged pink which fades to pale greenish yellow (2D) with age, and with randomly distributed, inconspicuous pink flecks; outside brilliant greenish yellow (2B). Calyx lobes c 0.1" (3mm) long, light yellow (12C). Truss 3.5" 90mm) high x 5" (125mm) wide. Lvs held 3 years, 4.5" x 2" (115 x 50mm), elliptic, broadly acute apex, rounded base, wavy and irregularly shaped margins; hairless; dull and dark yellowish green (136B) above, variegated with a distinctive, continuous, narrow pale yellow (160D) margin. Shrub 3' (0.9m) high x 3' (0.9m) wide in 10 years; dense habit. Plant and buds hardy to at least 0°F (-18°C). Mid April.