<i>Hydrangea </i>plant named ‘SMNHPM’

Abstract

A new and distinct Hydrangea cultivar named SMNHPM is disclosed, characterized by exceptionally large panicles and strong stems. Flowers are white with an intense pink flush, turning intense pink with maturity. The new variety is a Hydrangea, normally produced as an ornamental plant.

Claims

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

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

(1) The accompanying photograph in FIG. 1 illustrates in full color a typical plant of SMNHPM with inflorescences beginning to mature.

(2) FIG. 2 illustrates in full color typical plants with more mature inflorescences.

(3) FIG. 3 illustrates an inflorescence with both mature and immature flowers.

(4) Plants were grown outdoors, in Grand Haven, Mich. Age of the plant photographed is approximately 2 to 3 years. The photographs were taken using conventional techniques and although colors may appear different from actual colors due to light reflectance it is as accurate as possible by conventional photographic techniques.

DETAILED BOTANICAL DESCRIPTION

(5) In the following description, color references are made to The Royal Horticultural Society Color Chart 2015 except where general terms of ordinary dictionary significance are used. The following observations and measurements describe SMNHPM 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 SMNHPM.

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, thick to thin 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 slightly outward. Overall plant shape: Upright. Somewhat V-shaped. Height: 60 cm. Plant spread: 72 cm. Plant vigor: Strong, and vigorous. Branching habit: Upright and outward. Length of primary lateral branches: 37 cm. Diameter of lateral branches: 5 mm. Quantity of lateral branches: About 50. Stem: Stem shape.Rounded. Stem strength.Strong. Color.Immature: RHS Greyed-Orange 174A. Mature: Close to RHS Grey-Brown N200A. Pubescence.Yes, more prevalent on newer growth. Mature stems somewhat woody. Aspect.35 to 45. Internode length: 3.5 cm. Lenticels: Moderate density. About 3 to 7 per linear cm of stem. About 1 mm wide and 2-4 mm long. Color.RHS Greyed-Orange 167B.

FOLIAGE

(8) Leaf: Arrangement.Opposite. Leaf shape.Ovate. Average length.New: 4-5 cm. Mature: 6-10 cm. Average width.New: 2 cm. Mature: 3-5 cm. Apex.Acuminate. Base.Obtuse to Cuneate. Margin.Serrulate. Texture of top surface.Rough pubescence. Texture of bottom surface.Smooth, coriaceous, slightly pubescent. Leaf pubescence.Yes, both surfaces. Color.Young foliage upper side: RHS Yellow-Green 146B. Young foliage under side: RHS Yellow-Green 147B. Mature foliage upper side: RHS Green 137A. Mature foliage under side: RHS Yellow-Green 147B. Venation.Pattern: Pinnate. Color upper side: RHS Yellow-Green N144B. Color under side: RHS Yellow-Green 145D. Petiole.Average Length: 1 cm. Diameter: 2-3 mm. Petiole color upper side: RHS Yellow-Green 145A. Petiole color lower side: RHS Yellow-Green 145A. Petiole Texture upper side: Smooth, coriaceous, slightly pubescent. Petiole Texture lower side: Smooth, coriaceous, slightly pubescent.

FLOWER

(9) Natural flowering season: Early Summer. Inflorescence: Type.Mophead. Quantity of flowers per inflorescence.Fertile flowers: 50-100. Sterile flowers: About 200. 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.15 cm. Diameter.14 cm. Sterile flower: Bud shape.Orbicular and lobed. Bud length.1.5 mm. Bud diameter.1.5 mm. Bud color.RHS Yellow-Green 145C. Flower length.About 2 mm. Flower diameter.About 2.5 mm. Sterile flower petals: None. Sterile flower sepal: Arrangement.Whorl. Number.4. Shape.Elliptic. Tip.Obtuse. Base.Rounded to slightly acute. Margin.Entire. Length.1-1.5 cm. Width.8-10 mm. Texture, upper.Smooth, soft. Texture, lower.Smooth, soft. Color.Upper surface at first opening: RHS Green-Yellow 1C. Under surface at first opening: RHS Green-Yellow 1D. Upper surface at maturity: RHS White 155C. Flushed, then turning Red-Purple 61C and N57A. Under surface at maturity: RHS White 155C. Flushed Red-Purple 61C. Turning N57C at maturity. Sterile flower pedicel: Length.1.2 cm. Diameter.1 mm. Angle.45-90. Strength.Moderate. Texture.Pubescent. Color.RHS White 155C. Fertile flower: Bud shape.Orbicular and lobed. Bud length.3 mm. Bud diameter.4 mm. Bud color.RHS White NN155C with bit of Greyed-Purple 186C at the top. Flower shape.Star-shaped. Length.6 mm. Depth.5 mm. Flower aspect.Upright. Longevity.1 to 2 weeks. Fertile flower petals: Arrangement.Whorl. Quantity.5. Length of petal.About 1 mm. Width of petal.1 mm. Apex.Acute. Shape of petal.Triangular. Petal margin.Entire. Petal base.Truncate. Petal texture.Smooth, upper and under side. Color.Upper surface at first opening: RHS White 155C. Under surface at first opening: RHS White 155C. Upper surface at maturity: RHS White 155C. Under surface at maturity: RHS White 155C. Fertile flower sepal: Number.5. Arrangement.Ungulate. Shape.Fused/inconspicuous. Apex.Acute. Base.Rounded to obtuse. Margin.Entire. Length.1 mm. Width.2 mm. Texture.Smooth, glabrous, both sides. Color.Upper surface at first opening: RHS White 155C. Under surface at first opening: RHS White 155C. Upper surface at maturity: RHS White 155C. Under surface at maturity: RHS White 155C. Fertile Flower Pedicel: Angle.Upright. Strength.Strong. Length.2 mm. Width.1 mm. Texture.Smooth. Color.RHS White 155A.

REPRODUCTIVE ORGANS

(10) Sterile flowers: Reproductive organs not present. Fertile flowers: Stamens: Number.8. Filament length.0.75 mm. Filament color.RHS Yellow-Green 145A. Anthers: Shape.Linear. Length.1 mm. Color.RHS Yellow-Green 145A. Pollen.Not observed. Pistil: Number.1. Length.1 mm. Style.Length: 0.75 mm. Color: RHS Yellow-Green 145A. Ovary color: RHS White 155A and RHS Yellow-Green 145B. Stigma.Shape: Club. Color: RHS Yellow-Green 145A.

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 4 to 9.