plant named ‘ILVOHPPRM’
A new and distinct cultivar of Hydrangea plant named ‘ILVOHPPRM’ is disclosed, characterized by large conical-shaped panicles with flowers that age from greenish-white, to white, to pinkish-red. Plants have upright habits, red immature stems, and dark green foliage with yellow-green venation. The new variety is a Hydrangea, typically produced as an outdoor ornamental plant.
Latin name of the genus and species: Hydrangea x paniculata.
Variety denomination: ‘ILVOHPPRM’.
BACKGROUND OF THE INVENTIONThe new cultivar is a product of a planned breeding program conducted by the inventor in Melle, Belgium. The objective of the breeding program was to produce new Hydrangea varieties with good habits, and large panicles that age to vivid dark pink to red. The open-pollination resulting in the new variety was made during 2003.
The seed parent is the variety Hydrangea paniculata ‘DVPPinky’, U.S. Plant Pat. No. 16,166. The pollen parent cannot be identified as this new selection resulted from an open-pollination.
The new variety was found and selected by the inventor in 2005 at the same nursery in Melle, Belgium. Asexual reproduction of the new cultivar ‘ILVOHPPRM’ was first performed during 2008 in Melle, Belgium, by softwood cuttings. Through subsequent asexual propagation, multiple additional generations have been reproduced, having shown that the unique features of this cultivar are stable and reproduced true to type.
The first offer for sale occurred Jun. 21, 2022, in Grand Haven, Mich. This sale was made directly by the inventor or one who obtained the claimed invention directly or indirectly from the inventor. This sale and all public disclosures (made directly by the inventor or one who obtained the claimed invention directly or indirectly from the inventor) made between Jun. 21, 2022 and the filing of this application fall within the exception allowed under 35 U.S.C. 102(b)(1).
SUMMARY OF THE INVENTIONThe cultivar ‘ILVOHPPRM’ has not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment such as temperature, day length, and light intensity, without, however, any variance in genotype.
The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘ILVOHPPRM.’ These characteristics in combination distinguish ‘ILVOHPPRM’ as a new and distinct Hydrangea cultivar:
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- 1. Large, conical-shaped panicles.
- 2. Flowers age from greenish-white, to white, to pinkish-red.
- 3. Red stem color on new growth.
Plants of the new cultivar Hydrangea ‘ILVOHPPRM’ are similar to the seed parent in most horticultural characteristics, however, plants of ‘ILVOHPPRM’ differ in the following:
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- 1. Flower panicles of the new variety are larger than flower panicles of the seed parent.
- 2. Flower panicles of the new variety are denser than panicles of the seed parent.
Plants of the new cultivar Hydrangea ‘ILVOHPPRM’ can be compared to the commercial variety Hydrangea ‘RENSUN’, U.S. Plant Pat. No. 25,438. Plants of ‘ILVOHPPRM’ are similar to plants of ‘RENSUN’ in most horticultural characteristics, however, plants of ‘ILVOHPPRM’ differ in the following:
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- 1. Flower panicles of the new variety are larger than flower panicles of this comparator.
- 2. Sterile flower size of the new variety is larger than sterile flower size of this comparator.
The accompanying photographs in
In the following description, color references are made to The Royal Horticultural Society Colour Chart 2015, except where general terms of ordinary dictionary significance are used. The following observations and measurements describe ‘ILVOHPPRM’ plants grown in a poly-greenhouse in Grand Haven, Mich. The plants were about 2 to 3 years old. Temperatures ranged from 5° C. to 10° C. at night to 18° C. to 27° C. during the day. No artificial light, photoperiodic treatments were given to the plants. Measurements and numerical values represent averages of typical plant types.
- Botanical classification: Hydrangea x paniculata ‘ILVOHPPRM’.
- Typical method: Softwood cuttings.
- Root initiation: 20 days at 20° C. during summer.
- Time to produce rooted cutting: About 2 months at 20° C. during summer.
- Roots: Dense, freely branching, fibrous, thick to thin. Creamy white to brown in color, not accurately measured with RHS chart.
- Growth habit: Upright, upwards.
- Height: 90 to 100 cm.
- Plant spread: 70 cm.
- Pot size of plant described: 3 gallon container.
- Age of plant described: Approximately 2 to 3 years.
- Growth rate: Good.
- Plant vigor: Vigorous.
- Stem:
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- Branching.—Basal.
- Number of lateral branches.—10.
- Shape.—Rounded.
- Color.—Immature: RHS Greyed-Red 179A. Mature: RHS Brown 200B with Brown 200D lenticels.
- Length.—80 cm.
- Width.—7 mm.
- Aspect.—70 to 90°.
- Strength.—Quite strong.
- Pubescence.—None.
- Internode length.—7 to 10 cm.
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- Leaf:
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- Arrangement.—Whorl (3 leaves equally spaced around each node).
- Shape.—Elliptic.
- Length.—12.5 cm.
- Width.—6 cm.
- Apex.—Acuminate.
- Base.—Obtuse.
- Margin.—Serrulate.
- Texture of top surface.—Roughly textured with coarse, bristly hairs.
- Texture of bottom surface.—Roughly textured with coarse, bristly hairs and pronounced venation.
- Pubescence.—Yes, both sides.
- Color.—Young foliage upper side: RHS Green NN137B. Young foliage under side: RHS Greyed-Green 194A. Mature foliage upper side: RHS Green NN137B. Mature foliage, under side: RHS Greyed-Green 194A.
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- Venation:
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- Type.—Pinnate.
- Color.—Upper side: RHS Yellow-Green N144D. Under side: RHS Greyed-Green 194A with tinges of Greyed-Purple 183A closer to petiole.
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- Petiole:
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- Length.—2 cm.
- Width.—3 mm.
- Color.—Upper side: RHS Greyed-Purple 183A. Under side: RHS Greyed-Purple 183A.
- Texture.—Upper side: Lightly pubescent. Under side: Lightly pubescent.
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- Natural flowering season: Summer.
- Inflorescence type: Mophead.
- Panicle:
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- Shape.—Conical.
- Height.—25 to 30 cm.
- Diameter.—15 to 18 cm.
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- Fragrance: Sweet and floral, moderate intensity.
- Sterile flowers:
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- Flowers per inflorescence.—300 to 400.
- Aspect.—Outward to slightly upright.
- Shape.—Cruciform/stellate.
- Length.—4 to 5 cm.
- Diameter.—4 to 5 cm.
- Depth.—3 mm.
- Persistent or self-cleaning.—Persistent.
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- Bud:
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- Length.—4 mm.
- Diameter.—3 mm.
- Shape.—Obovate.
- Color.—RHS White NN155A.
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- Petals:
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- Number per flower.—3 to 4.
- Shape.—Narrowly elliptic.
- Tip.—Acute.
- Base.—Truncate.
- Margin.—Entire.
- Length.—4 mm.
- Width.—2 mm.
- Texture.—Upper side: Smooth. Under side: Smooth.
- Color.—When Opening, Upper side: RHS White NN155B. When Opening, Under side: RHS White NN155B. Fully Opened, Upper side: RHS White NN155B. Fully Opened, Under side: RHS White NN155B.
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- Sepal:
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- Number.—4 to 5.
- Arrangement.—Cruciform/stellate.
- Shape.—Elliptic.
- Tip.—Emarginate.
- Base.—Cuneate.
- Margin.—Entire.
- Length.—2 to 3 cm.
- Width.—1.5 to 2.25 cm.
- Texture.—Upper side: Soft and silky. Under side: Soft and silky.
- Color.—When Opening, Upper side: RHS Green-Yellow 1D. When Opening, Under side: RHS Green-Yellow 1D. Fully Opened, Upper side: RHS White 155A. Fully Opened, Under side: RHS White 155A. Fading, Upper side: RHS Red-Purple 65D mixed with 63A. Fading, Under side: RHS Red-Purple 65D mixed with 63A.
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- Pedicel:
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- Length.—2 cm.
- Diameter.—2 mm.
- Angle.—45°.
- Strength.—Good, flexible.
- Texture.—Lightly pubescent.
- Color.—RHS White 155A.
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- Fertile flowers:
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- Flowers per inflorescence.—Around 100.
- Aspect.—Upright and outward.
- Shape.—Stellate.
- Length.—1 cm.
- Diameter.—1 cm.
- Depth.—4 mm.
- Persistent or self-cleaning.—Self-cleaning.
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- Bud:
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- Length.—4 mm.
- Diameter.—3 mm.
- Shape.—Obovate.
- Color.—RHS White NN155A.
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- Petals:
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- Number per flower.—5.
- Arrangement.—Stellate.
- Shape.—Narrowly elliptic.
- Tip.—Acute.
- Base.—Flat-bottomed.
- Margin.—Entire.
- Length.—4 mm.
- Width.—2 mm.
- Texture.—Upper side: Smooth. Under side: Smooth.
- Color.—When Opening, Upper side: RHS White NN155B. When Opening, Under side: RHS White NN155B. Fully Opened, Upper side: RHS White NN155B. Fully Opened, Under side: RHS White NN155B.
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- Sepal: None.
- Pedicel:
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- Length.—2 mm.
- Diameter.—1 mm.
- Angle.—45°.
- Strength.—Good, flexible.
- Texture.—Lightly pubescent.
- Color.—RHS White 155A.
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- Sterile flower:
- Stamens:
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- Number.—About 8.
- Filament color.—RHS White NN155B.
- Filament length.—3 mm.
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- Anthers:
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- Length.—1 mm.
- Shape.—Rounded.
- Color.—RHS Yellow-White 158B.
- Pollen.—Moderate.
- Pollen color.—RHS Yellow-White 158C.
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- Pistil:
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- Number.—1.
- Length.—1 mm.
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- Stigma:
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- Shape.—Bi-lobed.
- Color.—RHS Yellow-White 158C.
- Style length.—0.5 mm.
- Style color.—RHS Yellow-White 158C.
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- Fertile flower:
- Stamen:
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- Number.—10.
- Filament length.—5 mm.
- Filament color.—RHS White NN155B.
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- Anther:
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- Shape.—Rounded.
- Length.—1 mm.
- Color.—RHS Yellow-White 158B.
- Pollen amount.—Moderate.
- Pollen color.—RHS Yellow-White 158C.
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- Pistil:
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- Number.—1.
- Length.—2 mm.
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- Stigma:
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- Shape.—Tri-lobed.
- Color.—RHS Yellow-White 158C.
- Style length.—1 mm.
- Style color.—RHS Yellow-White 158C.
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- Disease resistance: Neither resistance nor susceptibility to the normal diseases and pests of Hydrangea has been observed.
- Drought tolerance and cold tolerance: The new cultivar can tolerate cold temperatures to approximately −31° C. and tolerates an upper temperature range to at least 38° C.
- Fruit/seed production: Not observed to date.
Claims
1. A new and distinct cultivar of Hydrangea plant named ‘ILVOHPPRM’ as herein illustrated and described.
Type: Grant
Filed: Dec 22, 2022
Date of Patent: Aug 22, 2023
Inventor: Johan Van Huylenbroeck (Melle)
Primary Examiner: Kent L Bell
Application Number: 18/087,447
International Classification: A01H 5/02 (20180101); A01H 6/48 (20180101);