<i>Hydrangea </i>plant named ‘SCHROLLA25’

Abstract

A new and distinct cultivar of Hydrangea plant named ‘SCHROLLA25’, characterized by its compact, upright and mounded plant habit; moderately vigorous growth habit and rapid growth rate; freely branching habit and strong and sturdy stems; dark green-colored leaves; mophead-type inflorescences with purplish pink-colored sterile flowers; when “blued”, that is, treated with aluminum sulfate, sterile flowers are strong blue in color; long flowering period; and good postproduction quality and longevity as a container plant or cut flower and good garden performance.

Claims

1. A new and distinct Hydrangea plant named ‘SCHROLLA25’ 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) The photograph on the first sheet (FIG. 1) comprises a side perspective view of a typical flowering plant of ‘SCHROLLA25’ grown in a container that has been “blued”.

(3) The photograph on the second sheet (FIG. 2) is a close-up view of a typical inflorescence of ‘SCHROLLA25’ that has been “blued”.

(4) The photograph on the third sheet (FIG. 3) is a close-up view of a typical inflorescence of ‘SCHROLLA25’ that has not been “blued”.

DETAILED BOTANICAL DESCRIPTION

(5) Plants used in the aforementioned photographs and in the following description were grown during the summer in 13-cm containers in a glass-covered greenhouse in Aarslev, Denmark and under cultural practices typical of commercial Hydrangea production. Plants of the new Hydrangea were pinched two times and were one year old when the photographs and description were taken. During the production of the plants, day temperatures ranged from 15° C. to 25° C., night temperatures ranged from 15° C. to 20° C. and light levels ranged from 40 to 50 klux. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2007 Edition, except where general terms of ordinary dictionary significance are used. Botanical description: Hydrangea macrophylla ‘SCHROLLA25’. Parentage: Female, or seed, parent.—Proprietary selection of Hydrangea macrophylla identified as code number 32-00, not patented. Male, or pollen, parent.—Hydrangea macrophylla ‘Schroll1139-09-01a’, disclosed in U.S. Plant Pat. No. 28,907. Propagation: Type cutting.—By softwood cuttings. Time to initiate roots, summer.—About 14 to 15 days at temperatures about 20° C. Time to initiate roots, winter.—About 20 days at temperatures about 20° C. Time to produce a rooted young plant, summer.—About four weeks at temperatures about 20° C. to 22° C. Time to produce a rooted young plant, winter.—About five weeks at temperatures about 18° C. to 20° C. Root description.—Medium in thickness, fibrous; typically close to N155D 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; medium density. Plant description: Plant and growth habit.—Perennial sub shrub ; compact, upright and mounded plant habit; broadly inverted triangle; freely branching habit with about five to six lateral branches developing per plant; strong lateral branches; moderately vigorous growth habit and rapid growth rate. Plant height.—About 25 cm to 30 cm. Plant diameter or area of spread.—About 35 cm. Lateral branches.—Length: About 25 cm to 27 cm. Diameter: About 5 mm to 7 mm. Internode length: About 3 cm to 4.5 cm. Strength: Strong, sturdy. Texture: Mostly smooth and glabrous, however, just below inflorescence, slightly pubescent. Color, developing: Close to N144C. Color, developed: Close to 144A. Lenticels: Density: High. Length: About 0.5 mm to 1 mm. Color: Close to N77A. Leaf description: Arrangement.—Opposite, decussate; simple. Length.—About 7 cm to 9 cm. Width.—About 5.5 cm to 7 cm. Shape.—Ovate. Apex.—Acute. Base.—Attenuate. Margin.—Serrate. Texture, upper surface.—Smooth to rugose, glabrous. Texture, lower surface.—Rugose, glabrous. Venation pattern.—Pinnate, reticulate. Color.—Developing leaves, upper surface: Close to 139A. Developing leaves, lower surface: Close to 139C. Fully expanded leaves, upper surface: Close to N138A; venation, close to 143D. Fully expanded leaves, lower surface: Close to N137D; venation, close to 144D. Petioles.—Length: About 1.5 cm to 2 cm. Diameter: About 4 mm. Strength: Strong. Texture, upper and lower surfaces: Smooth, glabrous. Color, upper and lower surfaces: Close to 144D. Inflorescence & flower description: Flower type and habit.—Showy single sterile and inconspicuous single fertile flowers arranged on terminal mophead-type panicles; panicles globular in overall shape; sterile and fertile flowers face upright to outwardly depending on their position on the inflorescence; early flowering habit, plants begin flowering about ten to twelve weeks after forcing period. Natural flowering season.—Long flowering period, continuous flowering during the mid to late summer in Northern Europe. Flower longevity, sterile flowers.—Flowers last about four months on the plant and about three weeks as a cut flower; sterile flowers persistent. Flower longevity, fertile flowers.—Flowers last about two weeks on the plant; fertile flowers not persistent. Quantity of flowers.—Freely flowering habit with about 60 sterile flowers and about 25 fertile flowers per panicle. Fragrance.—None detected. Panicle height.—About 10 cm. Panicle diameter.—About 15 cm to 17 cm. Flower diameter, sterile flowers.—About 4 cm to 5.5 cm. Flower depth (height), sterile flowers.—About 1.5 cm. Flower diameter, fertile flowers.—About 4 mm. Flower depth (height), fertile flowers.—About 4 mm. Flower shape, sterile flowers.—Triangular to rounded, sepals facing upwardly. Flower shape, fertile flowers.—Spherical. Flower buds, sterile flowers.—Length: About 3 mm. Diameter: About 3 mm. Shape: Spherical. Color: Close to 144D. Flower buds, fertile flowers.—Length: About 3 mm. Diameter: About 3 mm. Shape: Spherical. Color: Close to 145D. Petals, sterile flowers.—Quantity and arrangement: Four, or occasionally three, in a single whorl. Length: About 2 mm. Width: About 1 mm. Shape: Ovate. Apex: Acute. Base: Obtuse. Margin: Entire. Texture, upper and lower surfaces: Smooth, glabrous. Color: When opening, upper and lower surfaces: Close to 150D. Fully opened, upper surface: Close to 62B; when “blued”, close to 95B; becoming closer to 199D with subsequent development and when “blued”, close to 98C. Fully opened, lower surface: Close to 62C; when “blued”, close to 95B; becoming closer to 199D with subsequent development and when “blued”, close to 98C. Petals, fertile flowers.—Quantity and arrangement: Typically five in a single whorl. Length: About 3 mm. Width: About 2 mm. Shape: Oval. Apex: Acute. Base: Cuneate. Margin: Entire. Texture, upper and lower surfaces: Smooth, glabrous. Color: When opening and fully opened, upper surface: Close to 62D; when “blued”, close to 101C; becoming closer to 165B with subsequent development. When opening and fully opened, lower surface: Close to 62D; when “blued”, close to 100C; becoming closer to 165B to 165C with subsequent development. Sepals, sterile flowers.—Quantity and arrangement: Four, or occasionally three, in a single whorl. Length: About 2 cm to 2.5 cm. Width: About 2.5 cm. Shape: Cordate. Apex: Broadly acute to obtuse. Base: Attenuate to cordate. Margin: Entire, undulate. Texture, upper surface: Smooth to rugose, glabrous. Texture, lower surface: Smooth to slightly ridged, glabrous. Color: When opening, upper and lower surfaces: Close to 150D. Fully opened, upper surface: Close to 63C; when “blued”, close to 100B; with subsequent development, color becoming closer to 70D and when “blued”, becoming closer to 101C with venation, close to 94C. Fully opened, lower surface: Close to 62B; when “blued”, close to 100C; with subsequent development, color becoming closer to 69A and when “blued”, becoming closer to 97B with venation, close to 96C. Sepals, fertile flowers.—Quantity and arrangement: Five in a single whorl. Length: About 1 mm. Width: About 1 mm. Shape: Deltoid. Apex: Acute. Base: Cuneate. Margin: Entire. Texture, upper and lower surfaces: Slightly pubescent. Color: When opening and fully opened, upper surface: Proximally, close to 62D and distally, close to 145B; when “blued”, proximally, close to 145D and distally, close to 145A. When opening and fully opened, lower surface: Proximally, close to 62D and distally, close to 145B; when “blued”, proximally, close to 145D and distally, close to 145A. Pedicels, sterile flowers.—Length: About 2.5 cm to 3 cm. Diameter: About 2 mm. Strength: Moderately strong. Aspect: Upright to about 135° from vertical. Texture: Pubescent. Color: Close to 62A. Pedicels, fertile flowers.—Length: About 3 mm. Diameter: About 1 mm. Strength: Moderately strong. Aspect: Upright to about 90° from vertical. Texture: Pubescent. Color: Close to 64D; when “blued”, close to 98B. Reproductive organs, sterile flowers.—Stamens: Quantity per flower: About eight. Filament length: About 2 mm. Filament color: Close to 150D. Anther length: About 1 mm. Anther shape: Oval to reniform. Anther color: Close to 151D. Pollen amount: None observed. Pistils: Pistil quantity per flower: Two. Pistil length: About 2 mm. Stigma shape: Oval. Stigma color: Close to 155A. Style length: About 1 mm. Style color: Close to 155A. Ovary color: Close to 155D. Reproductive organs, fertile flowers.—Stamens: Quantity per flower: Ten. Filament length: About 1 mm. Filament color: Close to 155D. Anther length: About 1 mm. Anther shape: Oval to reniform. Anther color: Close to 145B. Pollen amount: Scarce. Pollen color: Close to 158D. Pistils: Pistil quantity per flower: Three. Pistil length: About 3 mm. Stigma shape: Oval. Stigma color: Close to 155D. Style length: About 1 mm. Style color: Close to 155D. Seeds (present on fertile flowers only).—Quantity per fertile flower: About 50. Length: About 0.5 mm. Diameter: About 0.1 mm. Color: Close to 164D. Pathogen & pest resistance: To date, plants of the new Hydrangea have been observed to to tolerant to aphids and spider mites. Plants of the new Hydrangea have not been observed to be resistant to pathogens and other pests common to Hydrangea plants. Garden performance: Plants of the new Hydrangea have been observed to tolerate wind, rain, full sunlight conditions and temperatures ranging from about 3° C. to 32° C.