<i>Hydrangea </i>plant named ‘SMNHPK’

Abstract

A new and distinct cultivar of Hydrangea plant named SMNHPK is disclosed, characterized by a unique dwarf size, and attractive, well-shaped habit. Panicles changing color with maturity, creating long term ornamental interest. The new variety is a Hydrangea, normally produced as an ornamental plant.

Claims

1. A new and distinct cultivar of Hydrangea plant named SMNHPK as herein illustrated and described.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

(1) SMNHPK is illustrated by the accompanying photographs which show the plant's form, foliage, and inflorescences. The colors shown are as true as can be reasonably obtained by conventional photographic procedures. Colors in the photographs may differ slightly from the color values cited in the detailed botanical description, which accurately describe the colors of the new hybrid Hydrangea. Age of the plants photographed is between 2 to 3 years.

(2) FIG. 1 shows plants of SMNHMP grown outdoors in Grand Haven, Mich. during mid-Summer. Plants have both white and pink flowers.

(3) FIG. 2 shows the most mature inflorescence color of a container-grown plant, during late Summer.

(4) FIG. 3 shows the early Summer color of a mature inflorescence color of a container-grown plant, outdoors in Grand Haven, Mich. in 2019.

DETAILED BOTANICAL DESCRIPTION

(5) 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 SMNHPK plants grown in a commercial poly greenhouse in Grand Haven, Mich. under natural lighting. Measurements were taken during Summer of 2019. The plants were about 4 years old planted in the ground. The growing temperature ranged from 5 C. to 27 C. Measurements and numerical values represent averages of typical plant types. Botanical classification: Hydrangea paniculata SMNHPK.

PROPAGATION

(6) Time to initiate roots: Approximately 18 days. Time to produce a rooted young plants: Approximately 60 days. Root description: Fibrous, dense, freely branching, thin to thick roots. White to brown in color, not accurately measured with R.H.S. chart. Propagation method: Softwood cuttings.

PLANT

(7) Plant type: Flowering deciduous perennial shrub. Age of plant described: Approximately 2 to 3 years old. Growth habit: Upward and outward. Overall plant shape: Upright, rounded, compact. Height: 34 cm. Plant spread: 48 cm. Growth rate: Good. Plant vigor: Vigorous. Branching habit: Upright, outward. Length of primary lateral branches: 20 cm. Diameter of lateral branches: 5 mm. Quantity of lateral branches: 10. Stem: Stem shape.Round. Stem strength.Strong. Color.Immature: RHS Green 143D. Mature: RHS Greyed-Green 197C. Pubescence.On new growth. Aspect.0 to 45. Internode length: 2 to 4 cm. Root description: Moderately dense, thick main roots with fine, fibrous secondary roots. Main roots colored near Brown 200D, secondary roots near Yellow-White 158D.

FOLIAGE

(8) Leaf: Arrangement.Opposite. Leaf shape.Elliptic. Average length.6 cm. Average width.2.75 cm. Apex.Acute to attenuate. Base.Acute. Margin.Serrate. Texture of top surface.Slightly course. Texture of bottom surface.Smooth, with distinct veins. Leaf pubescence.Upper side. Color.Young foliage upper side: RHS Yellow-Green 146B. Young foliage under side: RHS Yellow-Green 148B. Mature foliage upper side: RHS Green 139A. Mature foliage under side: RHS Green NN137D. Venation.Pattern: Pinnate. Color upper side: RHS Yellow-Green N144D. Color under side: RHS Yellow-Green 145C. Petiole.Average Length: 1.5 cm. Diameter: 2 mm. Petiole color upper side: RHS Yellow-Green 144C. Petiole color lower side: RHS Yellow-Green 144C. Petiole Texture upper side: Smooth. Petiole Texture lower side: Smooth.

FLOWER

(9) Natural flowering season: July through August. Inflorescence: Type.Mophead. Quantity of flowers per inflorescence.Fertile flowers: 200 to 500. Sterile flowers: 200 to 500. Persistent or self-cleaning.Persistent, self-cleaning after several weeks. Longevity.Individual flowers stay fresh on the plant for about 2 weeks. Inflorescences are ornamental for several weeks. Fragrance.None detected. Panicle: Shape.Panicle. Height.14.5 cm. Diameter.15 cm. Sterile flower: Bud shape.Globose. Bud length.2 mm. Bud diameter.2 mm. Bud color.RHS White 155A. Flower aspect.Outward. Flower length.3 mm. Flower diameter.3 mm. Flower shape.Cruciform. Persistence.Persistent. Sterile flower petals: Petal arrangement.Cruciform. Quantity.4. Length of petal.1.5 mm. Width of petal.1 mm. Apex.Acute. Shape of petal.Lanceolate to oblong. Petal margin.Entire. Petal base.Obtuse. Petal texture.Smooth, upper and under side. Color.Upper surface at first opening: RHS White 155A. Under surface at first opening: RHS White 155A. Upper surface at maturity: RHS White 155A. Under surface at maturity: RHS White 155A. Sterile flower sepal: Arrangement.Cruciform. Number.4. Shape.Obovate. Tip.Obtuse. Base.Acute. Margin.Entire. Length.1 cm. Width.8 mm. Texture, upper.Smooth. Texture, lower.Smooth. Color.Upper surface at first opening: RHS White 155A. Under surface at first opening: RHS White 155A. Upper surface at maturity: RHS White 155A. Maturing to have a flush near Red-Purple N57D. Late Summer strongly flushed 61B. Under surface at maturity: RHS White 155A. Maturing to have a flush near Red-Purple 63B. Late Summer strongly flushed 59D. Upper surface, fading: RHS White 155A, covered Red-Purple 59C. Under surface, fading: RHS White 155A, covered Red-Purple 59C. Sterile flower pedicel: Length.1.5 cm. Diameter.1 mm. Angle.45-90. Strength.Moderate. Texture.Some pubescence. Color.RHS White 155A. Fertile flower: Shape.Rotate. Depth.4 mm. Diameter.5 mm. Flower aspect.Outward. Persistence.Persistent. Longevity.1-2 weeks. Bud shape.Orbicular. Bud length.2 mm. Bud diameter.2 mm. Bud texture.Glabrous. Bud color.RHS White 155A. Fertile flower petals: Arrangement.Whorl. Quantity.5. Length of petal.2 mm. Width of petal.1 mm. Apex.Acute. Shape of petal.Lanceolate. Petal margin.Entire. Petal base.Truncate. Petal texture.Smooth, upper and under side. Color.Upper surface at first opening: RHS White 155A. Under surface at first opening: RHS White 155A. Upper surface at maturity: RHS White 155A. Under surface at maturity: RHS White 155A. Fertile flower sepal: Inconspicuous. Fertile flower pedicel: Angle.90. Strength.Moderate. Length.3 mm. Width.1 mm. Texture.Slight pubescence. Color.RHS White 155A.

REPRODUCTIVE ORGANS

(10) Sterile flowers: Stamens: Inconspicuous, less than 1 mm. Anthers: None. Fertile flowers: Stamens: Number.8 to 10. Filament length.1 mm. Filament color.RHS White 155A. Anthers: Shape.Club. Length.<1 mm. Color.RHS White 155A. Pollen color.RHS White 155A. Pollen amount.Scant to moderate. Pistil: Number.2 lobes. Length.1 mm. Style.Length: 0.5 mm. Color: RHS White 155A. Stigma.Shape: Lobed. Color: RHS White 155A.

OTHER CHARACTERISTICS

(11) Seeds and fruits: None observed. Disease/pest resistance: Neither resistance nor susceptibility to normal diseases and pests of Hydrangea have been observed. Temperature tolerance: USDA Zones 3 to 9.