Hydrangea plant named 'LC NO12'

Abstract

A new and distinct cultivar of Hydrangea plant named LC NO12, characterized by its upright to outwardly spreading and uniform plant habit; freely branching habit with strong lateral branches; early and freely flowering habit with plants remaining in flower for a long period time; dense and hardy inflorescences with large white-colored sterile flowers; and good garden performance.

Claims

1. A new and distinct Hydrangea plant named LC NO12 as illustrated and described.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

[0031] 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.

[0032] The photograph on the first sheet is a side perspective view of a typical flowering plant of LC NO12 grown in a container.

[0033] The photographs on the second sheet are close-up views of typical inflorescences (top of sheet) and typical leaves (bottom of sheet) of LC NO12.

DETAILED BOTANICAL DESCRIPTION

[0034] Plants used in the aforementioned photographs and in the following description were grown during the late summer in 21-cm containers in an outdoor nursery in Boskoop, The Netherlands and under cultural practices typical of commercial Hydrangea production. During the production of the plants, day temperatures ranged from about 16 C. to 35 C. and night temperatures ranged from about 12 C. to 22 C. Plants of the new Hydrangea were pinched one time and were two years old when the photographs and description were taken. As a Hardy or Panicled Hydrangea, plants of the new Hydrangea are typically not treated with aluminum sulfate to blue the inflorescences. 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. [0035] Botanical description: Hydrangea paniculata LC NO12. [0036] Parentage: [0037] Female, or seed, parent.Hydrangea paniculata Silver Dollar, not patented. [0038] Male, or pollen, parent.Hydrangea paniculata DVP Pinky, disclosed in U.S. Plant Pat. No. 16,166. [0039] Propagation: [0040] Type cutting.By vegetative tip cuttings. [0041] Time to initiate roots, summer.About 16 days at temperatures about 16 C. to 30 C. [0042] Time to produce a rooted young plant, summer.About 120 days at temperatures about 16 C. to 30 C. [0043] Root description.Medium in thickness, 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. [0044] Rooting habit.Freely branching; dense. [0045] Plant description: [0046] Plant and growth habit.Upright to outwardly spreading and uniform plant habit; overall plant shape, upright broad inverted triangular; strong and sturdy stems; moderately vigorous growth habit and moderate to high growth rate. [0047] Plant height.About 80.3 cm. [0048] Plant diameter or area of spread.About 56 cm. [0049] Lateral Branch description: [0050] Branching habit.About 13 lateral branches develop per plant; pinching enhances lateral branch development. [0051] Length.About 32.9 cm. [0052] Diameter.About 5 mm. [0053] Internode length.About 3.8 cm. [0054] Texture.When developing, moderately pubescent; fully developed, woody. [0055] Aspect.Upright to about 30 from vertical. [0056] Strength.Strong, sturdy. [0057] Color.When developing: Upper surface, close to 177D; lower surface, close to 195B to 195C. Developed: Close to N199C to N199D; proximally, close to 200B to 200C; when woody, close to 199B and 200A to 200B. [0058] Lenticels.Density: Moderate; none observed on developing stems. Size, developed stems: About 1.5 mm by 0.75 mm. Color, developed stems: Close to 165B. [0059] Leaf description: [0060] Arrangement.Opposite or in whorls of three, simple. [0061] Length.About 8.9 cm. [0062] Width.About 5.1 cm. [0063] Shape.Ovate. [0064] Apex.Apiculate to acute. [0065] Base.Rounded, occasionally short attenuate or truncate. [0066] Margin.Serrate; coarsely undulate. [0067] Texture, upper and lower surfaces.Moderately pubescent; slightly rough. [0068] Venation pattern.Pinnate. [0069] Color.Developing leaves, upper surface: Close to 143A. Developing leaves, lower surface: Close to 138B. Fully developed leaves, upper surface: Close to 143A; venation, close to N170B. Fully developed leaves, lower surface: Close to 146D; venation, close to 193B, distally, tinged with close to 179D. [0070] Petioles.Length: About 1.5 cm. Diameter: About 2 mm. Texture and luster, upper surface: Sparsely pubescent; matte. Texture and luster, lower surface: Smooth, glabrous; matte. Color, upper surface: Close to 195B to 195C; towards the edges, close to 181B to 181C. Color, lower surface: Close to 196B. [0071] Flower description: [0072] Flower type and habit.Showy sterile flowers and smaller inconspicuous fertile flowers arranged on terminal panicles; panicles dense and broadly conical to roughly deltoid in shape; sterile flowers face upright to outwardly and slightly drooping depending on their position in the inflorescence; fertile flowers face mostly upright. [0073] Fragrance.Moderately fragrant; sweet to slightly moldy. [0074] Natural flowering season.Flowering begins in the midsummer and is continuous until late summer in Northern Europe. [0075] Flower longevity.Sterile flowers last about six weeks on the plant, sterile flowers persistent; fertile flowers last about five days on the plant, fertile flowers not persistent. [0076] Quantity of flowers.Freely flowering habit; about 1,200 sterile flowers and about 1,100 fertile flowers per panicle. [0077] Panicle height.About 20.2 cm. [0078] Panicle diameter.About 16.4 cm. [0079] Sterile flower buds.Length: About 5 mm. Diameter: About 1.25 cm. Shape: Broadly cup-shaped. Color: Close to 150D. [0080] Fertile flower buds.Length: About 4 mm. Diameter: About 3 mm. Shape: Broadly obovate. Color: Close to 157D; immature calyx, close to 193C. [0081] Sterile flower diameter.About 2.2 cm. [0082] Sterile flower depth (height).About 1.7 cm. [0083] Fertile flower diameter.About 9 mm. [0084] Fertile flower depth (height).About 5 mm. [0085] Petals, sterile flowers.Quantity and arrangement: Four or occasionally five arranged in a single whorl. Length: About 2.75 mm. Width: About 1.5 mm. Shape: Ovate, concave. Apex: Acute. Base: Cuneate. Margin: Entire. Texture and luster, upper surface: Smooth, glabrous; slightly glossy. Texture and luster, lower surface: Smooth, glabrous; matte. Color: When opening, upper and lower surfaces: Close to NN155D. Fully opened, upper and lower surfaces: Close to NN155D; color does not change with development. [0086] Petals, fertile flowers.Quantity and arrangement: Five arranged in a single whorl. Length: About 4 mm. Width: About 2 mm. Shape: Ovate, slightly concave. Apex: Acute. Base: Cuneate. Margin: Entire. Texture and luster, upper surface: Smooth, glabrous; slightly glossy. Texture and luster, lower surface: Smooth, glabrous; matte. Color: When opening and fully opened, upper surface: Close to 155C; color does not change with development. When opening and fully opened, lower surface: Close to 155C; color does not change with development. [0087] Sepals, sterile flowers.Quantity and arrangement: Typically four or occasionally five arranged in a single whorl. Length: About 1.35 cm. Width: About 1.1 cm. Shape: Broadly obovate to roughly orbicular; flat to slightly concave. Apex: Shallowly emarginate. Base: Broadly attenuate. Margin: Entire. Texture and luster, upper and lower surfaces: Smooth, glabrous; matte. Color: When opening, upper and lower surfaces: Close to 155A. Fully opened, upper surface: Close to 155A; with subsequent development, color becoming closer to 50B. Fully opened, lower surface: Close to 155A; with subsequent development, color becoming closer to between 53B and 185A. [0088] Sepals, fertile flowers.Quantity and arrangement: Five in a single whorl. Length: About 1 mm. Width: About 1.25 mm. Shape: Broadly deltoid. Apex: Broadly acuminate. Base: Broadly cuneate. Margin: Entire. Texture and luster, upper and lower surfaces: Smooth, glabrous; matte. Color: When opening, upper and lower surfaces: Close to 193C. Fully opened, upper and lower surfaces: Close to between 145D and 150D; color does not change with development. [0089] Pedicels, sterile flowers.Length: About 1.9 cm. Diameter: About 1 mm. Strength: Moderately strong. Aspect: About 45 from branch axis. Texture and luster: Moderately pubescent; matte. Color: Close to 157D. [0090] Pedicels, fertile flowers.Length: About 5 mm. Diameter: About 0.5 mm. Strength: Moderately strong. Aspect: About 30 from vertical. Texture and luster: Densely pubescent; matte. Color: Close to 157D. [0091] Reproductive organs, sterile flowers.Stamens: Quantity per flower: About eight. Filament length: About 3 mm. Filament color: Close to NN155B. Anther length: About 0.5 mm. Anther shape: Broadly oblong. Anther color: Close to 155A. Pollen amount: Scarce. Pollen color: Close to 156D. Pistils: To date, pistil development has not been observed on sterile flowers of plants of the new Hydrangea. [0092] Reproductive organs, fertile flowers.Stamens: Quantity per flower: About ten. Filament length: About 4 mm. Filament color: Close to NN155C. Anther length: About 0.5 mm. Anther shape: Broadly oblong. Anther color: Close to 155A strongly tinged with close to 186D. Pollen amount: Scarce. Pollen color: Close to 156D. Pistils: Pistil quantity per flower: Typically three or occasionally two. Pistil length: About 1.25 mm. Stigma shape: Club-shaped. Stigma color: Close to 155C. Style length: About 0.75 mm. Style color: Close to 155D. Ovary color: Close to 157B. [0093] Seeds.To date, seed production has not been observed on plants of the new Hydrangea. [0094] PATHOGEN & PEST RESISTANCE To date, under commercial production conditions, plants of the new Hydrangea have not been observed to be resistant to pathogens and pests common to Hydrangea plants. [0095] GARDEN PERFORMANCE Plants of the new Hydrangea have been observed have good garden performance and to be suitable for USDA Hardiness Zones 5 through 9.