<i>Hydrangea </i>plant named ‘HYLV17522’

Abstract

A new and distinct cultivar of Hydrangea plant named ‘HYLV17522’, characterized by its relatively compact, upright to broadly spreading and mounding plant habit; moderately vigorous growth habit; freely branching habit; strong and sturdy stems; freely flowering habit; panicles with yellowish green-colored sterile flowers that become dark red in color with subsequent development; and good garden performance.

Claims

1. A new and distinct Hydrangea plant named ‘HYLV17522’ as illustrated and described.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

(1) The accompanying colored photographs illustrate the unique appearance of the new Hydrangea plant showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photographs may differ from the color values cited in the detailed botanical description which accurately describe the colors of the new Hydrangea plant.

(2) FIG. 1 is a side perspective view of a typical flowering plant of ‘HYLV17522’ grown in a container.

(3) FIG. 2 is a close-up view of typical inflorescences of ‘HYLV17522’.

(4) FIG. 3 is a close-up view of typical inflorescences of ‘HYLV17522’ at the end of the flowering season.

(5) FIG. 4 is a close-up view of typical leaves of ‘HYLV17522’.

DETAILED BOTANICAL DESCRIPTION

(6) Plants used in the aforementioned photographs and in the following description were grown during the summer in 21-cm containers in an outdoor nursery in Reeuwijk, The Netherlands and under cultural practices typical of commercial Hydrangea production. During the production of the plants, day temperatures ranged from 18° C. to 30° C., night temperatures ranged from 8° C. to 18° C. Plants of the new Hydrangea were pinched in the early summer. Plants were three years old when the photographs and description were taken. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2015 Edition, except where general terms of ordinary dictionary significance are used. Paniculated Hydrangea plants are not typically treated with aluminum sulfate to “blue” the flower color. Botanical description: Hydrangea paniculata ‘HYLV17522’. Parentage: Female, or seed, patent.—Proprietary selection of Hydrangea paniculata identified as code number P13502, not patented. Male, or pollen, patent.—Unknown selection of Hydrangea paniculata, not patented. Propagation: Type cutting.—By vegetative terminal cuttings. Time to initiate roots, summer.—About 16 days at temperatures ranging from 20° C. to 30° C. Time to produce a rooted young plant, summer.—About four months at temperatures ranging from 20° C. to 30° C. Root description.—Medium in thickness to thick; fibrous; typically light brown in color, actual color of the roots is dependent on substrate composition, water quality, fertilizer type and formulation, substrate temperature and physiological age of roots. Rooting habit.—Freely branching; dense. Plant description: Plant and growth habit.—Relatively compact; upright to broadly outwardly spreading and mounding plant habit; flattened broadly obovate in overall shape; strong and sturdy stems; moderately vigorous growth habit and moderate growth rate; about one year from propagation are required to produce small finished plants. Plant height.—About 55 cm. Plant diameter or area of spread.—About 55.5 cm. Lateral branch description: Branching habit.—Freely branching habit with about eleven lateral branches developing per plant; pinching is not required, but will enhance lateral branch development. Length.—About 31.1 cm. Diameter.—About 6 mm. Internode length.—About 4.5 cm. Strength.—Strong, sturdy. Aspect.—Erect to about 65° from vertical. Texture.—Sparsely pubescent; becoming woody with subsequent development. Color, developing.—Close to 146B. Color, fully developed.—Close to N199A; when woody, close to 197D and 199B to 199D. Lenticels.—Density: Medium density. Length: About 1 mm. Diameter: About 0.5 mm. Color: Close to 164C. Leaf description: Arrangement.—Opposite or in whorls of three, simple. Length.—About 8.6 cm. Width.—About 4.6 cm. Shape.—Ovate; slightly to moderately carinate. Apex.—Apiculate to acute. Base.—Obtuse. Margin.—Serrate. Texture and luster, upper and lower surfaces.—Sparsely pubescent; matte. Venation pattern.—Pinnate. Color.—Developing leaves, upper surface: Close to 143A. Developing leaves, lower surface: Close to a blend of 144A and 146B. Fully developed leaves, upper surface: Close to NN137B; venation, close to N170C. Fully developed leaves, lower surface: Close to 147B; venation, close to 146C. Petioles.—Length: About 1.6 cm. Diameter: About 2.5 mm. Texture and luster, upper surface: Smooth, glabrous; slightly glossy. Texture and luster, lower surface: Sparsely pubescent; slightly glossy. Color, upper surface: Close to 146C. Color, lower surface: Close to 144A. Flower description: Flower type and habit.—Showy rotate sterile flowers and small, inconspicuous rotate fertile flowers arranged on terminal panicles; panicles irregular conical in shape; sterile flowers face upright, outwardly to slightly drooping and fertile flowers face mostly upright. Fragrance.—Faintly fragrant; sweet and pleasant. Natural flowering season.—In the garden, plants flower continuously from the midsummer to late summer in The Netherlands. Flower longevity.—Good postproduction longevity; sterile flowers maintain good substance for about six weeks on the plant, sterile flowers persistent; fertile flowers last for about five days on the plant, fertile flowers not persistent. Quantity of flowers.—Freely flowering habit; about 1,000 sterile flowers per panicle and about 400 fertile flowers per panicle. Panicle height.—About 20.4 cm. Panicle diameter.—About 15.9 cm. Panicle peduncles.—Length: About 19 cm. Diameter: About 3.5 mm. Strength: Moderately strong. Aspect: Primary peduncles, mostly erect; lateral peduncles, about 40° from primary peduncle axis. Texture and luster: Moderately pubescent; matte. Color: Close to 146B to 146C. Sterile flower buds.—Length: About 5 mm. Diameter: About 1.5 cm. Shape: Broadly cup-shaped. Color: Close to 145B and 145C. Fertile flower buds.—Length: About 3 mm. Diameter: About 2 mm. Shape: Broadly obovate. Color: Immature corolla, close to 157D and immature calyx, close to 145B. Sterile flower diameter.—About 2.2 cm. Sterile flower depth (height).—About 6 mm. Fertile flower diameter.—About 7 mm. Fertile flower depth (height).—About 4 mm. Petals, sterile flowers.—Quantity and arrangement: Three or four in a single whorl. Length: About 3 mm. Width: About 1.25 mm. Shape: Ovate. Apex: Acute. Base: Cuneate. Margin: Entire. Texture and luster, upper and lower surfaces: Smooth, glabrous; slightly glossy. Color: When opening and fully opened, upper surface: Close to NN155D; color does not change with subsequent development. When opening and fully opened, lower surface: Close to NN155D; color does not change with subsequent development. Petals, fertile flowers.—Quantity and arrangement: Five in a single whorl. Length: About 2.5 mm. Width: About 1.25 mm. Shape: Ovate, slightly concave. Apex: Acute. Base: Cuneate. Margin: Entire. Texture and luster, upper and lower surfaces: Smooth, glabrous; slightly glossy. Color: When opening and fully opened, upper surface: Close to NN155B; color does not change with subsequent development. When opening and fully opened, lower surface: Close to NN155B; color does not change with subsequent development. Sepals, sterile flowers.—Quantity and arrangement: Typically four, or occasionally three, arranged in a single whorl. Length: About 1.15 cm. Width: About 7 mm. Shape: Elliptic to slightly obovate. Apex: Obtuse. Base: Cuneate. Margin: Entire. Texture and luster, upper and lower surfaces: Smooth, glabrous; matte. Color: When opening, upper and lower surfaces: Close to 145C. Fully opened, upper surface: Close to 145B; with subsequent development, color becoming closer to 145A and eventually, close to 60A. Fully opened, lower surface: Close to a blend of 145B and 149D; with subsequent development, color becoming closer to a blend of 145A and 146D and eventually, close to 185B. Sepals, fertile flowers.—Quantity and arrangement: Five in a single whorl. Length: About 1 mm. Width: About 1 mm. Shape: Deltoid. Apex: Broadly acuminate. Base: Broadly cuneate. Margin: Entire. Texture and luster, upper and lower surfaces: Smooth, glabrous; matte. Color: When opening and fully opened, upper surface: Close to 145C; color does not change with subsequent development. When opening and fully opened, lower surface: Close to 145C; color does not change with subsequent development. Pedicels, sterile flowers.—Length: About 1.1 cm. Diameter: About 1 mm. Strength: Moderately strong. Aspect: About 30° from main peduncle axis Texture and luster: Moderately pubescent; matte. Color: Close to 145D. Pedicels, fertile flowers.—Length: About 1.5 mm. Diameter: About 0.75 mm. Strength: Moderately strong. Aspect: About 5° from vertical. Texture and luster: Moderately pubescent; matte. Color: Close to 145C to 145D with one or two small spots, close to 185B. Reproductive organs, sterile flowers.—Stamens: Quantity per flower: Eight. Filament length: About 1 mm. Filament color: Close to NN155A. Anther shape: Oblong. Anther length: About 0.5 mm. Anther color: Close to 158D to lighter than 158D. Pollen amount: Sparse. Pollen color: Close to lighter than 156D. Pistils: Pistil quantity per flower: One. Pistil length: About 1.5 mm. Stigma shape: Club-shaped. Stigma color: Close to 155C. Style length: About 1.25 mm. Style color: Close to NN155A. Reproductive organs, fertile flowers.—Stamens: Quantity per flower: Ten. Filament length: About 2 mm. Filament color: Close to NN155B. Anther shape: Oblong. Anther length: About 0.5 mm. Anther color: Close to 158D to lighter than 158D. Pollen amount: Sparse. Pollen color: Close to lighter than 156D. Pistils: Pistil quantity per flower: Two or occasionally, three. Pistil length: About 2 mm. Stigma shape: Club-shaped. Stigma color: Close to 155C. Style length: About 1.5 mm. Style color: Close to NN155A. Ovary color: Close to 157A. Seeds.—To date, seed development has not been observed on plants of the new Hydrangea. Pathogen & pest resistance: Plants of the new Hydrangea have not been observed to be resistant to pathogens and pests common to Hydrangea plants. Temperature tolerance: Plants of the new Hydrangea have been shown to be suitable for USDA Hardiness Zones 5 through 9.