American Rhododendron Society Plant Registry

The following rhododendron and azalea names, submitted through the North American registrar, were approved and added to the International Rhododendron Register prior to February 1, 2003 by the Royal Horticultural Society, International Cultivar Registration Authority for the genus Rhododendron . Names conform to the rules and recommendations of the International Code of Nomenclature for Cultivated Plants - 1995 .

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). The format for reporting parentage conforms with that now used by the ICRA. If the direction of the cross is known, the seed parent is followed by an "(s)". For the plant being described, seed and pollen parents are separated by an upper case "X". 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 by, REG = registered by; dates are enclosed in parentheses immediately following the activity.

Metric conversions of flower and leaf measurements are reported in 5mm (0.2") increments for dimensions greater than 25mm (1").

(v) 'Chumash Brave': Lepidote rhododendron: [ R. laetum x ( R. macgregoriae x R. aurigeranum )] (s) X ( R. intranervatum x R. aurigeranum ). H (1988), G (1994), N (2002), and REG (2002): W. Moynier, Los Angeles, CA. Fls 7-9/dome truss, narrowly funnel-shaped, 2.2" (55mm) long x 2" (50mm) wide, with 5 slightly wavy-edged lobes; inside strong orange (24A) changing to vivid yellow (14B) in throat, unmarked; outside vivid yellow (14B). Truss 3" (75mm) high x 6" (150mm) wide. Lvs held 2-3 years, 3.5" x 2" (90 x 50mm), elliptic, broadly acute apex, cuneate base, upcurved margins; semi-glossy green above, with tan scales, mainly below. Shrub 2.7' (0.8m) high x 2.9' (0.9m) wide in 13 years, intermediate habit; short inter-nodal distance, 2"-3" (50-75mm). Plant and bud hardy to at least 32°F (0°C). August-November.

(v) 'Haulani': Lepidote rhododendron: R. hellwigii (s) X R. lochiae . H (?): J. Rouse, Victoria, Australia; G (2002), N (2002) and REG (2002): R.A. Mitchell, Volcano, HI. Fls 5/dome truss, tubular funnel-shaped, 2.5" (65mm) long x 2.2" (55mm) wide, 5 wavy/flat-edged lobes; inside vivid red (46C), outside vivid red (46B); unmarked. Truss 3" (75mm) high x 7.5" (190mm) wide. Lvs 4" x 3" (100 x 75mm), elliptic, acuminate apex, rounded base; semi glossy and deep yellowish green (141A) above. Shrub 3' (0.9m) high x 3' (0.9m) wide; open habit. Plant hardy to at least 35°F (2°C). October-December. (Named for Hawaiian goddess of plants.)

(v) 'Hina': Lepidote rhododendron: ( R. zoelleri x R. leucogigas ) (s) X ['Doctor Herman Sleumer' x ( R. macgregoriae x R. aurigeranum )]. H (1995), G (2000), N (2002) and REG (2002): R.A. Mitchell, Volcano, HI. Fls 6/flat truss, tubular funnel-shaped, 2.5" (65mm) long x 2.5" (65mm) wide, 5 wavy-edged lobes; inside moderate pink (51D) lobes merging into light greenish yellow (8B) tube; outside moderate pink (51D) at lobe margins merging into light greenish yellow (8B); unmarked. Truss 3.5" (90mm) high x 6.5" (165mm) wide. Lvs 5" x 2" (125 x 50mm), elliptic, acuminate apex, cuneate base, upcurved margins, dull and dark yellowish green (136B) above. Shrub 4' (1.2m) high x 3' (0.9m) wide in 7 years, intermediate habit. Plant hardy to at least 35°F (2°C). October-December. (Named for Hawaiian goddess in the moon.)

(v) 'Hoku Ula': Lepidote rhododendron: ( R. hellwigii x 'Ne Plus Ultra') (s) X R. aurigeranum hybrid (known locally as "Glenn's large hybrid"). H (1997), G (2001), N (2002) and REG (2002): R.A. Mitchell, Volcano, HI. Fls 5/dome truss, tubular funnel-shaped, 3" (75mm) long x 3.2" (80mm) wide, 5-6 wavy-edged lobes; inside vivid reddish orange (40B) merging into light greenish yellow (8B) tube; outside similar; unmarked. Truss 4" (100mm) high x 6" (150mm) wide. Lvs 5" x 2" (125 x 50mm), lanceolate, acute apex, cuneate base, flat margins; dull and deep yellowish green (141A) above. Shrub 4' (1.2m) high x 3' (0.9m) wide in 5 years, open habit. Plant hardy to at least 35°F (2°C). October-December.

R. 'Hoku Ula'. Photo by R.A. Mitchell

(a) 'James Stewart': Evergreen azalea. 'Asahi-sakigake'* (s) X 'Margaret Douglas'. H (1994), G (1996), N (2002), and REG (2002): Robert Stewart, Springfield, VA. Fls 2-3/truss, openly funnel-shaped, 1.5" (40mm) x 0.8" (20mm) wide, 5 wavy-edged lobes; bud color white and Pantone® 211U (close to RHS (58D) deep purplish pink), opening inside white with ends of lobes Pantone® 211U; outside 211U. Calyx c 0.2" (5mm) long, green. Lvs 1.75" (45mm) x 0.8" (20mm), elliptic, broadly acute apex, rounded base, down-curved margins, semi-glossy and Pantone® 378U (near RHS (147B) moderate yellow green) above, hairless. Shrub 2.5' (0.75m) tall x 2.5' (0.75m) wide in 7 years, intermediate habit, very floriferous. Plant and bud hardy to at least 0°F (-18°C). Mid May.

(v) 'Kapo': Lepidote rhododendron: R. hellwigii (s) X 'Ne Plus Ultra'; ARS Seed Exchange lot 90-08. H (c 1990): J. Rouse, Victoria, Australia; G (1998), N (2002) and REG (2002): R.A. Mitchell, Volcano, HI. Fls 5/dome truss, tubular funnel-shaped, 3.5" (90mm) long x 3.5" (90mm) wide, 5 wavy-edged lobes; vivid red (52A) throughout, unmarked. Calyx lobes 0.25" (6mm) long, strong red (53D). Truss 4" (100mm) high x 8" (200mm) wide. Lvs 5" x 2.5" (125 x 65mm), elliptic, acuminate apex, cuneate base, down-curved margins; semi-glossy and deep yellowish green (141A) above. Shrub 5' (1.5m) high x 3' (0.9m) wide in 10 years, intermediate habit. Plant hardy to at least 35°F (2°C). October-December. (Named for Hawaiian goddess of sorcery.)

(v) 'Lilinoe': Lepidote rhododendron: ( R. zoelleri x R. leucogigas ) (s) X 'Doctor Herman Sleumer'. H (1995), G (2000), N (2002) and REG (2002): R.A. Mitchell, Volcano, HI. Fls 3/dome truss, tubular funnel-shaped, 3" (75mm) long x 2.8" (70mm) wide, 5 wavy-edged lobes; inside light yellow (20B) with two red blotches at base of each lobe; outside light yellow (20B) at margins, blending into vivid reddish orange (40B) about halfway down the tube. Calyx lobes 0.25" (6mm) long, light yellow (20B). Truss 4.2" (105mm) high x 6" (150mm) wide. Lvs 3.5" x 2.2" (90 x 55mm), elliptic and orbicular, acuminate apex, rounded base, flat margins; semi-glossy and deep yellowish green (141A) above. Shrub 2.5' (0.75m) high x 2' (0.6m) wide in 7 years, intermediate habit. Plant hardy to at least 35°F (2°C). November. (Named for Hawaiian goddess of the mists.)

(v) 'Maile': Lepidote rhododendron: ( R. leucogigas x R. laetum ) (s) X R. javanicum . H (c 1994): probably W. Moynier, Los Angeles, CA; G (2000), N (2002) and REG (2002): R.A. Mitchell, Volcano, HI. Fls 7/dome truss, tubular funnel-shaped, 3" (75mm) long x 2.8" (70mm) wide, 5 frilly-edged lobes; inside light yellow (12C), with the margins slightly darker, blending into strong red (41B) about half way to the base; outside strong red (41B); unmarked. Truss 5.5" (140mm) high x 8" (200mm) wide. Calyx lobes 0.25" (6mm) long, light greenish yellow (4C). Lvs 7" x 2.8" (175 x 70mm), elliptic, acute apex, rounded base, upcurved margins, semi-glossy and dark yellowish green (136B) above. Shrub 5' (1.5m) high x 3' (0.9m) wide in c 8 years. Plant hardy to at least 35°F (2°C). October. (Seedling obtained from E.W. Moyles, Oakland, CA.)

(v) 'Point Arguello': Lepidote rhododendron: R. javanicum (s) X 'Red Prince'. H (1980), G (c 1987), N (2002), and REG (2002): W. Moynier, Los Angeles, CA. Fls 12-15/dome truss, narrowly funnel-shaped, 2.2" (55mm) long x 2.5" (65mm) wide, with 5 slightly wavy-edged lobes; deep blackish maroon in bud, opening inside moderate yellowish pink (33D), with strong pink (48D) deep in throat; outside moderate yellowish pink (33D); (overall appearance is coral); lightly scented. Truss 3.5" (90mm) high x 5.5" (140mm) wide. Lvs held 3 years, 4.2" x 1.5" (105 x 40mm), elliptic, broadly acute apex, cuneate base, flat margins; semi-glossy and deep green above, with tan scales, mainly below. Shrub 3' (0.9m) high x 3.3' (1.0m) wide in 20 years, intermediate habit. Plant and bud hardy to at least 32°F (0°C). October-December.

(v) 'Point Loma': Lepidote rhododendron: ( R. macgregoriae x R. aurigeranum ) (s) X 'Doctor Herman Sleumer'. H (1971) and G: Peter Sullivan, San Francisco, CA; N (2002), and REG (2002): W. Moynier, Los Angeles, CA. Fls 5-8/dome truss, narrowly funnel-shaped, 2" (50mm) long x 2.2" (55mm) wide with 6 wavy to frilly-edged lobes; maroon with a hint of pink in bud, opening inside pale yellow (158A), with a hint of blush pink at edges, and moderate to pale yellow (162) deep in throat; outside similarly colored; moderately scented. Truss 3" (75mm) high x 5.5" (140 mm) wide. Lvs held 2-3 years, 2.8"-3" x 1.5" (70-75 x 40mm), elliptic, broadly acute apex, cuneate base, upcurved margins, dull and dark green above, with tan scales, mainly below. Shrub 3.8' (1.1m) high x 3.8' (1.1m) wide in 14 years, open to intermediate habit; resembles a miniature R. konori with wavy lobes. Plant and bud hardy to at least 32°F (0°C). August-December.

(v) 'Poliahu': Lepidote rhododendron: 'Doctor Herman Sleumer (s) x ( R. zoelleri x R. leucogigas ). H (1995), G (2002), N (2002) and REG (2002): R.A. Mitchell, Volcano, HI. Fls 4/dome truss, tubular funnel-shaped with lobes deeply cut and overlapping, 2.5" (65mm) long x 3" (75mm) wide, 6 wavy-edged lobes; white, lightly flushed pale pink in bud, opening greenish white (155C) throughout, lightly flushed pale pink at edges and in throat, merging into pale yellow at base. Lvs 3.5" x 1.8" (90 x 45 mm, elliptic, broadly acute apex, rounded base, deep yellowish green (141A) above. Shrub 2' (0.6m) high x 1.5' (0.45m) wide in 7 years. Plant hardy to at least 35°F (2°C). October-December. (Named for Hawaiian snow goddess.)

(v) 'San Clemente': Lepidote rhododendron: 'Marshall Pierce Madison' (s) X R. javanicum . H (1989), G (1995), N (2002), and REG (2002: W. Moynier, Los Angeles, CA. Fls 12-20/dome truss, narrowly funnel-shaped, 3.8" (95mm) long x 3" (75mm) wide, with 5 flat-edged lobes; maroon in bud opening inside and out vivid reddish orange (41A), unmarked. Truss 4.2" (105mm) high x 8" (200mm) wide. Lvs held 2-3 years, 7" x 2.8" (175 x 70mm), elliptic, broadly acute apex, cuneate base, upcurved margins; semi-glossy and dark green above, with tan scales above and below. Shrub 3.7' (1.1m) high x 3.3' (1.0m) wide in 12 years, dense habit (more compact than sister clone 'Anacapa'). Plant and bud hardy to at least 32°F (0°C). December-February.

* The following unregistered name appears as a parent in the above descriptions:

'Asahi-sakigake': Evergreen azalea; no data available