JARS v61n4 - 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 August 1, 2007 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").

(a) 'Amherst': Evergreen azalea: (unnamed hybrid CB-1* x 'Desiree' [Shammarello]) (s) X unnamed hybrid CB-1*. H (1992), G (1995), N (2006), and REG (2007): Robert Stewart, Springfield, VA. Fls 3/truss, broadly funnel-shaped, single, 1.8" (45mm) long x 3" (75mm) wide; white in bud, opening white inside and out, with sparse yellow (close to (142A)) dorsal spotting. Calyx lobes 0.5" (c 15mm) long, slightly darker yellow than brilliant yellow green (142B). Lvs 2.2" x 0.8" (55 x 20mm), elliptic, broadly acute apex, cuneate base, upcurved margins, semi-glossy and mid green above. Shrub 2.5' (0.8m) tall x 3.7' (1.1m) wide in 10 years, intermediate habit. Midseason.

(r) 'April Sunset': Elepidote rhododendron: ('Apricot Nectar' x 'Lem's Cameo') (s) X 'Lem's Cameo'. H (1998), G (2002), N, and REG (2007): Catherine Weeks, Eureka, CA; I (2007) Westgate Gardens Nursery, Eureka, CA. Fls 12-13/dome truss, funnel-campanulate, 2.5" (65mm) long x 3" (75mm) wide, with 6 wavy-edged lobes. Color vivid red (45A) in bud, opening inside strong red (39A) at margins, blending with brilliant yellow (8A) towards center and then to strong red (41B) and finally moderate red (47A) at base; outside moderate red (47A) to deep yellowish pink (47C); unmarked. Truss 5" (125mm) high x 6.5" (165mm) wide. Lvs 6" x 2" (150 x 50mm), elliptic, broadly acute apex, rounded base, flat margins; dull and dark yellowish green (139A) above; hairless. Shrub 4' (1.2m) high x 4' (1.2m) wide in 9 years; intermediate habit. Plant and bud hardy to at least 20°F (-7°C). Early to mid April.

(r) 'Bodacious': Elepidote rhododendron: ('Ring of Fire' x 'Lem's Cameo') (s) X 'One Thousand Butterflies'. H (1998), G (2002), N (2002), and REG (2007): James S. Smith, Mapleton, OR; I (2005): Roadside Rhododendrons, Mapleton, OR. Fls 32/dome truss, broadly funnel-shaped; 2" (50mm) long x 3" (75mm) wide, with 5 wavy-edged lobes. Bicolor inside with a continuous moderate pink (51D) margin changing abruptly to a pale greenish yellow (2D) throat; outside strong red (46A). Truss 5" (125mm) high x 8" (200mm) wide. Lvs 9.8" x 2.5" (245 x 65mm), lanceolate, broadly acute apex, oblique base; glossy and moderate olive green (147A) above; hairless. Shrub 6' (1.8m) high x 4' (1.2m) wide in 10 years; dense habit. Plant and bud hardy to at least 5°F (-15°C). Mid to late April. (Award received at ARS, Eugene Chapter show (2003): Best New American Hybrid.) (Synonym: 'Roadside Bounty')

(r) 'Butter Rum': Elepidote rhododendron: 'Janet Blair' (s) X ('Nancy Evans' x ['Whopper' x 'Brandt's Tropicana'] No. 2). H (1999), G (2004), N (2007), and REG (2007): James S. Smith, Mapleton, OR; I (2007): Roadside Rhododendrons, Mapleton, OR. Fls 12/flat truss, broadly funnel-shaped; 2.5" (65mm) long x 3.5" (90mm) wide, with 7 frilly-edged lobes. Corolla opens pale greenish yellow (13D) inside with deep yellowish pink (47C) spotting on two dorsal lobes; outside pale yellow (18C); the (47C) spots show through to the outside, creating an orange appearance. Truss 8" (200mm) high x 8" (200mm) wide. Lvs 7" x 2" (175 x 50mm), elliptic, broadly acute apex, oblique base, wavy margins; semi-glossy and moderate olive green (137A) above; hairless. Shrub 4' (1.2m) high x 3' (0.9m) wide in 5 years; intermediate habit. Plant hardy to at least 5°F (-15°C); buds, 10°F (-12°C). Mid May.

(r) 'Cascade Dawn': Elepidote rhododendron: (probably 'Hotei' or 'Odee Wright') (s) X open pollinated. H (c 1995), G (c 2001), N (2007), and REG (2007): Donald E. King, Issaquah, WA. Fls 10/dome truss, broadly funnel-shaped, 2.2" (55mm) long x 3" (75mm) wide, with 6 wavy-edged lobes. Color inside corolla changes with time from pink through light yellow and cream to white, with a dark orange-red to red blotch in the throat; outside color ages from pink to cream; red bud scales appear on new growth during the bloom period, adding significantly to the attractiveness of the plant. Truss 5.5" (140mm) high x 7" (175mm) wide. Lvs held 2+ years, 4.5" x 1.5" (115 x 40mm), elliptic, acute apex, cuneate to rounded base, wavy margins; dull and mid green above; hairless. Shrub 3.5' (1.1m) high x 3.5' (1.1m) wide in 15 years; intermediate habit. Plant and bud hardy to at least 15°F (-9°C). Mid April – early May.

(r) 'Charlotte Weingarten': Elepidote rhododendron: Parentage unknown. H (1987): Charlotte Ballantine Smith, Vancouver, WA; G (1993), N, and REG (2007): Billie Weingarten, Washougal, WA; I (2008/9): Van Veen Nursery, Portland, OR. Fls c 20/conical truss, openly to broadly funnel-shaped, 3" (75mm) long x 2" (50mm) wide, with 5 frilly-edged lobes. Color dark purple (79A) in bud, opening inside deep purplish red (71A) with a dark grayish purple (202A) blotch; outside dark purple (79A); whitish anthers. Lvs held 3 years; 4.5"-6" x 1.8" (115-150 x 45mm), elliptic, acute apex, cuneate base, flat margins; glossy and moderate olive green above; hairless. Shrub 5' (1.5m) high x 4' (1.2m) wide in 20 years. Plant and bud hardy to at least 10°F (-12°C). Mid May. (First place, Novice Division, Portland Chapter, ARS Show, 2007.)

(r) 'Creamcicle': Elepidote rhododendron: 'Brandt's Tropicana' (s) X 'Apricot Fantasy'. H (1989), G (1993), and REG (2007): W.A. Stipe, Greenbank, WA; N (2007): Sandra Stipe, Freeland, WA; I (2007): Glynneden Gardens, Greenbank, WA. Fls 14/ball truss, broadly funnel-shaped, 2.2" (55mm) long x 2.5" (65mm) wide, with 5 wavy-edged lobes. Color strong red (46A) in bud, opening inside light orange yellow (22C) with a strong red (53B) dorsal flare; outside brilliant orange (25C). Truss 5.5" (140mm) high x 5.5" (140mm) wide. Lvs held 2 years, oblong, obtuse apex, oblique base, down-curved margins; semi-glossy and dark green (135A) above; hairless. Shrub 8' (2.4m) high x 6' (1.8m) wide in 15 years; open habit. Plant and bud hardy to at least 15°F (-9°C). Early May.

(a) 'Debra Lee': Evergreen azalea: ('Saybrook Glory' x 'Dorothy Clark' *) (s) X 'Saybrook Glory'. H (1996), G, N (2006), and REG (2007): Robert Stewart, Springfield, VA. Fls 3/truss, broadly funnel-shaped, single, 1.8" (45mm) long x 3" (75mm) wide, bicolor, with 5 wavy-edged lobes. Color slightly brighter than deep purplish pink (67C) in bud, opening inside with a band of light purple (75B) to very light purple (75C) at margins, changing abruptly to a paler shade of the same color, with purplish pink dorsal spotting; outside close to deep purplish pink (67C). Calyx lobes 0.25" (6mm) long, close to brilliant yellow green (142B). Lvs 2.2" x 1" (55 x 25mm), elliptic, broadly acute apex, cuneate base, upcurved margins; semi-glossy and close to moderate yellow green (139C) above. Shrub 1.7' (0.5m) tall x 2' (0.6m) wide in 10 years, intermediate habit. Plant and bud hardy to 0°F (-18°C). Midseason.

(r) 'Dick Brooks': Elepidote rhododendron: 'Dexter's Giant Red' (s) X R. yakushimanum , Whitney's dwarf selection . H (1989): Charles Patterson, Norwell, MA; G (1995), N (2006), and REG (2007): George Hibben, Lincoln, MA; I: RareFind Nursery, Jackson, NJ. Fls 7-23/dome truss, broadly funnel-shaped, c 2.2" (55mm) long x 4" (100mm) wide, with 6-7 wavy-edged lobes. Color deep to strong purplish pink (55A-B) in bud, opening inside with moderate purplish pink (62B) margins and flushed lighter pink, aging to white; with a basal blotch, deep red (53A) overlaid with dark red (187A), and a spotted dorsal flare of the same color; outside also aging to white after opening with strong purplish pink (62A) margins and veins in midribs. Calyx lobes minute, light yellow green (145C). Truss 6.5" (165mm) high x 4.5" (115mm) wide. Lvs held 3+ years; 4"-6" x 1.2"-1.8" (100-150 x 30-45mm), elliptic, broadly acute apex, slightly oblique base, flat margins; dull and moderate olive green (137A) above; new lvs with yellowish white (155D) hairs above and below; mature lvs moderate orange yellow (164B) hairs below only (heaviest on midrib). Shrub 5' (1.5m) high x 10' (3m) wide in 17 years; dense habit. Plant and bud hardy to at least -10°F (-23°C). Mid-late May.

(r) 'Glynneden Dawn Chorus': Elepidote rhododendron: 'Nancy Evans' (s) X 'Exbury Naomi'. H (1992), G (1997), N (2007), and REG (2007): W.A. Stipe, Greenbank, WA; I (2005): Glynneden Gardens, Greenbank, WA. Fls 14/dome truss, broadly funnel-shaped, 3" (75mm) long x 4" (100mm) wide, with 5 wavy-edged lobes. Color dark red (59A) in bud, opening inside vivid yellow (14B) with sparse, deep yellowish pink (39B) dorsal spotting; outside light yellow (20B) with moderate yellowish pink (38B) markings. Truss 6" (150mm) high x 8" (200mm) wide. Lvs held 2 years, elliptic, broadly acute apex, rounded base, down-curved margins; semi-glossy and moderate olive green (137A) above; hairless. Shrub 4.5' (1.4m) high x 3.7' (1.1m) wide in 9 years; intermediate habit. Plant and bud hardy to at least 15°F (-9°C). Mid May.

(r) 'Great Gatsby': Elepidote rhododendron: 'Janet Blair' (s) X 'Phipps 84'*. H (1986), G (1995), N (2007), and REG (2007): Werner Brack, Saint James, NY. Fls 10/dome truss, broadly funnel-shaped, c2.5" (65mm) long x 5" (125mm) wide, with 6 wavy-edged lobes. Color pale purplish pink (56C) in bud, opening white inside with 6 strong red (46A) flares in the throat and a strong red (46A) speckled dorsal blotch, all on a light greenish yellow (8C) background; outside white. Calyx lobes c 0.1" (3mm) long, strong yellow green (144A). Truss 5" (125mm) high x 7" (175mm) wide. Lvs held 2-3 years, 5.5" x 2.5" (140 x 65mm), obovate, obtuse apex, rounded base, flat margins; dull and moderate olive green (146A) above; hairless. Shrub 7' (2.1m) high x 6' (1.8m) wide in 21 years; dense habit. Plant and bud hardy to at least -5°F (-21°C). Mid May.

(r) 'Iona Campagnolo': Elepidote rhododendron: 'Etta Burrows' (s) X 'Fusilier'. H (1986): Jean Round, Vancouver, B.C., Canada; G: Garth Wedemire, Maple Ridge, B.C., Canada; N (2007), Carol Dancer, Victoria, B.C., Canada; N (2007) and REG (2007): Norman Todd, Victoria, B.C., Canada. Fls 20/dome truss, openly campanulate, 2.5" (65mm) long x 3" (75mm) wide, with 5 wavy-edged lobes. Color vivid red (46C) in bud, opening inside deep yellowish pink (46D) with a strong red (46A) basal blotch; outside deep yellowish pink (46D); anthers black. Calyx lobes 0.2" (5mm) long, strong red (46A). Truss 6" (150mm) high x 8" (200mm) wide. Lvs held 3 years, 10" x 2.8" (250 x 70mm), lanceolate, acuminate apex, rounded base, flat margins; semi-glossy and dark yellowish green (139A) above; with very sparse, moderate reddish brown (166B) hairs on underside of midvein. Shrub 9' (2.7m) high x 9' (2.7m) wide in 30 years; intermediate habit. Plant and bud hardy to at least 5°F (-15°C). March-April.

(r) 'Jim's Black Heart': Elepidote rhododendron: 'Wine Fuschia' (s) X 'Kilimanjaro'. H (2000), G (2003), N, and REG (2007): James S. Smith, Mapleton, OR; I (2007): Roadside Rhododendrons, Mapleton, OR. Fls 21-25/rigid, tightly packed, conical truss, funnel-campanulate, waxy substance; 2.5" (65mm) long x 3.5" (90mm) wide, with 5 wavy-edged lobes. Color inside dark red (59A) with prominent dark red (187A) speckling on dorsal lobe and at base; outside dark red (187B). Truss 7"-8" (175-200mm) high x 6" (150mm) wide. Lvs 9.5" x 2.5" (240 x 65mm), oblong, broadly acute apex, rounded base, down-curved margins; glossy and moderate olive green (147A) above; hairless. Shrub 4' (1.2m) high x 3' (0.9m) wide in 5 years; intermediate habit. Plant and bud hardy to at least 5°F (-15°C). Late May. (Awards received at ARS, Siuslaw Chapter show (2005): (1) Best New American Hybrid, (2) Best in Show.)

(a) 'Karee Lynn': Evergreen azalea: ('Mrs Nancy Dippel' x 'Satellite') (s) X 'Mrs Nancy Dippel'. H (1997), G (2000), N (2006), and REG (2007): Robert Stewart, Springfield, VA. Fls 3/truss, broadly funnel-shaped, double, 1.5" (40mm) long x 2.5" (65mm) wide, with frilly-edged lobes. Color deep yellowish pink (43C) in bud, opening slightly paler than deep yellowish pink (43C) throughout; sparse (43C) spotting. Calyx lobes 0.5" (15mm) long, brilliant yellow green (142B). Lvs 2.4" x c 1" (60 x 25mm), elliptic, broadly acute apex, cuneate base, upcurved margins; semi-glossy and near moderate yellow green (146B) above. Shrub 1.7' (0.5m) tall x 2.7' (0.8m) wide in 9 years, intermediate habit. Plant and bud hardy to 0°F (-18°C). Midseason.

(r) 'Karen Gervais Beauty': Elepidote rhododendron: 'Anna' (s) X 'Purple Lace'. H (1991), G (1995), N (2007), and REG (2007): W.A. Stipe, Greenbank, WA; I (2007): Glynneden Gardens, Greenbank, WA. Fls 21/dome truss, broadly funnel-shaped, 3" (75mm) long x 3" (75mm) wide, with 5 frilly-edged lobes. Color dark purple (79A) in bud, opening inside strong purplish red (60B) with dark purple (79A) spots and blotch deep in throat; outside deep red (60A). Truss 6" (150mm) high x 6" (150mm) wide. Lvs held 2 years, elliptic, broadly acute apex, rounded base, downcurved margins; semi-glossy and dark yellowish green (139A) above; hairless. Shrub 6' (1.8m) high x 5' (1.5m) wide in 15 years; intermediate habit. Plant and bud hardy to at least 15°F (-9°C). Mid May.

(r) 'Kristie Lynn': Elepidote rhododendron: 'Karen Triplett' (s) X 'Big Deal'. H (1999), G (2002), I and REG (2007): George Woodard, Old Westbury, NY; N (2007): Kristie Sisson, Brookville, NY. Fls 12-15/conical truss, broadly funnel-shaped, 2" (50mm) long x 2" (50mm) wide, with 6-7 wavy-edged lobes. Color pale yellow (11C) in bud, opening pale yellow (11C) throughout; unmarked. Calyx lobes c 0.5" (15mm) long, strong yellowish green (141C). Truss 6" (150mm) high x 8" (200mm) wide. Lvs held 2 years; 7" x 2.5" (175 x 65mm), elliptic, broadly acute apex, cuneate base, down-curved margins; glossy and moderate olive green (147A) above; hairless. Shrub 3' (0.9m) high x 4' (1.2m) wide in 5 years; dense habit. Plant and bud hardy to at least 0°F (-18°C). Mid season.

(r) 'Little Susie Q': Elepidote rhododendron: ('Scintillation' x 'Inamorata') (s) X an unnamed, yellow-flowered, Hardgrove hybrid*. H (1965) and G (1971): Richard Murcott, East Norwich, NY; N (2006) and REG (2007): Susan Baricilli, Sea Cliff, NY. Fls 13/ball truss, broadly funnel-shaped, c 2" (50mm) long x 3.5" (90mm) wide, with 7 wavy-edged lobes. Color deep purplish pink (54B) in bud, opening inside pale yellowish pink (36D) with pale yellow (11D) deep in the base; outside moderate yellowish pink (38B); unmarked. Calyx lobes less than 0.1" (1mm) long, strong yellowish green (134B). Truss 5" (125mm) high x 6" (150mm) wide. Lvs held 2 years; 4" x 2" (100 x 50mm), elliptic, broadly acute apex, rounded base, flat margins; dull and vivid yellowish green (140A) above; hairless. Shrub 6' (1.8m) high x 6' (1.8m) wide in 12 years; intermediate habit. Plant and bud hardy to at least -5°F (-21°C). Mid season.

(r) 'Lover's Blush': Elepidote rhododendron: 'Raspberry and Custard' (s) X open pollinated. H (1999), G (2003), N (2007), and REG (2007): Merle Sanders, 350 Orchard Lane, Roseburg, OR; I (2009): Sanders Nursery, Roseburg, OR. Fls 12-18/dome truss, openly funnel-shaped, 2" (50mm) long x 2.5" (65mm) wide, with 5 wavy-edged lobes; lightly scented. Color yellowish white (155D) in bud, opening yellowish white (155D) and darkening gradually over a 10 day period to strong purplish pink (68B) throughout; dorsal flare of discrete vivid purplish red (66A) speckles. Truss 4" (100mm) high x 6" (150mm) wide. Lvs held 3 years, 5.3" x 2.4" (130 x 60mm), elliptic, broadly acute apex, rounded base, flat margins; semi-glossy and mid green above; hairless. Shrub 2.7' (0.8m) high x 3' (0.9m) wide in 8 years; intermediate habit. Plant hardy to at least 0°F (-18°C); buds, 5°F (-15°C). Mid April.

(r) 'Moonlite Champagne': Elepidote rhododendron: R. macabeanum (s) X ('Yaku Sunrise' x ['C.I.S.' x 'Jingle Bells']). H (1995), G ( 2000), N ( 2006), and REG: W.A. Stipe, Greenbank, WA; I (2007): Glynneden Gardens, Greenbank, WA. Fls 12/dome truss, funnel-campanulate, 2.5" (65mm) long x 2.5" (65mm) wide, with 7 flat-edged lobes. Color deep red (60A) in bud, opening pale greenish yellow (2D) throughout, with a dark red (59A) dorsal blotch. Truss 3" (75mm) high x 3.5" (90mm) wide. Lvs held 2 years, elliptic, broadly acute apex, rounded base, flat margins; semi-glossy and moderate olive green (147A) above; with hairs on underside of blade and midrib, grayish yellow green (195B) at first, maturing to moderate yellow (161B). Shrub 4' (1.2m) high x 5' (1.5m) wide in 7 years; intermediate habit. Plant and bud hardy to at least 15°F (-9°C). Mid May.

(r) 'Ray Jefferis': Elepidote rhododendron: R. yakushimanum (s) X unknown . H (c 1960/2): Raymond P. Jefferis, Media, PA; G (c 1975): Philip Livingston, Narberth, PA; N (c 1987): possibly Bob Wilkinson, Philadelphia, PA; REG (2007): Dr Sibylle Jefferis, Wayne, PA. Fls 8/dome truss, openly funnel-shaped, 2.5" (65mm) long x 3.5" (90mm) wide, with 5 wavy-edged lobes. Color deep pink, almost red, in bud, opening inside pale pink with a darker pink throat; outside darker pink; with darker pink markings on outside mid veins. Calyx lobes 1.2" (30mm) long, strong yellow. Truss 4.5" (115mm) high x 6.5" (165mm) wide. Lvs 4.5"-5.5" x 1.5"-2" (115-140 x 40-50mm); elliptic, broadly acute apex, cuneate base, flat to slightly down-curved margins; semi-glossy and dark green above; hairs on underside of lvs, orange at first maturing to yellow brown. Shrub 2.3' (0.7m) high x 3' (0.9m) wide in 20 years; intermediate habit. Plant hardy to at least -10°F (-23°C). Late May.

(v) 'Sherla Bertelmann': Vireya (lepidote) rhododendron: ( R. zoelleri x R. leucogigas ) (s) X R. commonae , red-flowered. H (1996), G, N (2007), and REG (2007): R.A. (Mitch) Mitchell, Volcano, HI. Fls 7/flat truss, tubular funnel-shaped, 2.5" (65mm) long x 2.5" (65mm) wide, with 5 wavy-edged lobes. Corolla opening strong red (53B) throughout; unmarked. Truss 3" (75mm) high x 5" (125mm) wide. Lvs obovate, obtuse apex, cuneate base, down-curved margins; semi-glossy and moderate olive green (137A) above. Shrub 6' (1.8m) high x 3' (0.9m) wide in 7 years; intermediate habit. Plant and bud hardy to at least 40°F (4°C). Late June-July.

(r) 'Sugar Puff': Lepidote rhododendron: R. racemosum (s) X R. minus Carolinianum Group. H and G: Fred Read, Ramapo, NY; N (2007), I, and REG (2007): Briggs Nursery, Elma, WA. Fls 14-20/terminal, openly funnel-shaped; 1" (25mm) long x 1.2" (30mm) wide, with 5 wavy-edged lobes. Color of bud is light yellow green (145B) at base and deep purplish pink (66C) at apex, the corolla opening greenish white (155C) throughout, with moderate purplish pink (66D) veining outside; unmarked. Terminal inflorescence, consisting of 7-8 flower buds, is 1.5" (40mm) high x 2" (50mm) wide. Lvs held 3 years, lanceolate, broadly acute apex, rounded base, flat margins; dull and moderate yellow green (137C) above; scaly. Shrub 2.5' (0.75m) high, 2' (0.6m) wide in 3 years; intermediate habit. Plant hardy to at least -30°F (-34°C). Late March-early April.

* The following unregistered names appear as parents in the above descriptions:
CB-1: evergreen to semi-evergreen azalea; hybrid of unknown parentage used by Robert Stewart in his breeding program; fls semi-double, pink and white.
'Dorothy Clark': evergreen azalea; R & I: J.O. Harris, Lawrenceville, GA; parentage: 'Grace Freeman No. 2' X 'Amagasa'
'Phipps 84': elepidote rhododendron; H: Howard Phipps (early to mid 1960s), Long Island, NY; parentage unknown but may include Naomi Group and R. wardii in its background. Buds open nearly white inside and out, with a trace of pink on margins and on outside; initially throat is a distinct yellow/green (fading with age) with small, dark red markings; red glandular structures present on outside of corolla and entire length of style. Fls lightly scented; lvs held 2 years; shrub tall, flowering in early mid season.
Unnamed, yellow-flowered, Hardgrove hybrid: elepidote rhododendron; H (pre-1965): Donald Hardgrove. Parentage: a hardy selection of R. fortunei (s) X ( R. dichroanthum x R. wardii ).