<i>Saxifraga </i>plant named ‘SH 1911’

Abstract

A new and distinct cultivar of Saxifraga plant named ‘SH 1911’, characterized by its upright to outwardly spreading and mounded plant habit; moderately vigorous growth habit; leaves that have dark green-colored upper surfaces and greyed purple-colored lower surfaces; and numerous bright white-colored flowers held about the foliar plane.

Claims

1. A new and distinct Saxifraga plant named ‘SH 1911’ as illustrated and described.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

(1) The accompanying colored photographs illustrate the overall appearance of the new Saxifraga 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 slightly from the color values cited in the detailed botanical description which accurately describe the colors of the new Saxifraga plant.

(2) The photograph on the first sheet (FIG. 1) is a side perspective view of a typical flowering plant of ‘SH 1911’ grown in a container.

(3) The photograph on the second sheet (FIG. 2) is a close-up view of a typical flowering plant of ‘SH 1911’.

DETAILED BOTANICAL DESCRIPTION

(4) The aforementioned photographs and following observations, measurements and values describe plants grown during the summer and autumn in 10.5-cm containers in a glass-covered greenhouse in Glandorf, Germany and under cultural practices typical of commercial Saxifraga production. During the production of the plants, day temperatures ranged from 18° C. to 28° C. and night temperatures ranged from 14° C. to 20° C. Plants were six months old when the photographs and the 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. Botanical classification: Saxifraga cortusifolia ‘SH 1911’. Parentage: Female, or seed, parent.—Proprietary selection of Saxifraga cortusifolia disclosed as code number 2013-44, not patented. Male, or pollen, parent.—Proprietary selection of Saxifraga cortusifolia disclosed as code number 2013-459, not patented. Propagation: Type.—In vitro axillary meristem culture. Time to produce a rooted young plant in vitro.—About 36 to 42 days at temperatures about 22° C. to 24° C. Root description.—Fine, fibrous; typically white to 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.—Moderately freely branching; sparse to medium density. Plant description: Plant and growth habit.—Herbaceous perennial; upright to outwardly spreading and mounding plant habit with flowers held above the foliar plane; overall plant shape, broadly inverted triangular; moderately vigorous growth habit and moderate growth rate. Plant height, soil level to top of foliar plane.—About 11.1 cm. Plant height, soil level to top of floral plane.—About 24 cm. Plant diameter (area of spread).—About 24.8 cm. Leaf description: Arrangement.—Leaves arranged in a basal rosette; alternate and single. Length.—About 5.5 cm. Width.—About 7.1 cm. Shape.—Reniform in outline. Apex.—Abruptly acute. Base.—Deeply truncate to hastate, lobes free. Margin.—Serrate and palmately lobed with about nine lobes per leaf; sinuses shallow to medium in depth and convergent. Texture and luster, upper surface.—Moderately pubescent; slightly glossy. Texture and luster, lower surface.—Sparsely pubescent; moderately glossy. Venation pattern.—Pinnate. Color.—Developing leaves, upper surface: Close to 147A; lobes tinged with close to 181A. Developing leaves, lower surface: Close to between 60C and N77B; towards the margins, close to 177A. Fully developed leaves, upper surface: Close to between NN137A and 147A; distal lobes, tinged with close to 200A; venation, close to between NN137A and 147A occasionally tinged with close to N200A. Fully developed leaves, lower surface: Close to between N77B and 186A; distal lobes, tinged with close to 187C; venation, close to 197B. Petioles.—Length: About 8.5 cm. Diameter: About 3 mm. Strength: Weak. Texture and luster, upper and lower surfaces: Mostly smooth, glabrous and distally sparsely pubescent; slightly glossy. Color, upper and lower surfaces: Close to 183B to 183C. Stipules.—Arrangement: Two at the base of the petiole. Length: About 1.9 cm. Diameter: About 5 mm. Color, upper surface: Close to 182B. Color, lower surface: Close to 185C. Flower description: Flower shape and habit.—Rotate flowers arranged in terminal compound corymbs; freely flowering habit with about 100 flowers per inflorescence and about 1,000 flowers developing per plant; flowers face mostly upright to slightly outwardly. Fragrance.—None detected. Natural flowering season.—Plants begin flowering about six months after planting; plants flower naturally from the late summer into the winter in Germany. Flower longevity on the plant.—About two weeks; flowers persistent. Flower buds.—Length: About 1 mm. Diameter: About 1.5 mm. Shape: Flattened globular. Texture and luster: Smooth, glabrous; matte. Color: Close to 182A. Inflorescence height (including peduncle).—About 22.7 cm. Inflorescence diameter.—About 12 cm. Flower diameter.—About 1.2 cm by 1.5 cm. Flower depth (height).—About 6 mm. Petals.—Quantity and arrangement: About five, occasionally six, arranged in a single whorl; upper three or four petals are smaller than lower one or two petals. Length, upper petals: About 5 mm to 7 mm. Width, upper petals: About 2 mm to 3 mm. Length, lower petals: About 1.1 cm to 1.3 cm. Width, lower petals: About 2.5 mm to 4 mm. Shape, upper petals: Ovate. Shape, lower petals: Oblanceolate to elliptic. Apex, upper petals: Bluntly acute to obtuse. Apex, lower petals: Bluntly acute to obtuse to occasionally emarginate. Base, upper and lower petals: Attenuate. Margin, upper petals: Entire; not undulate. Margin, lower petals: Mostly entire, occasionally sparsely serrate; not undulate. Texture and luster, upper and lower petals, upper and lower surfaces: Smooth, glabrous; slightly velvety; matte. Color, upper and lower petals: When opening, upper and lower surfaces: Close to 157C. Fully opened, upper surface: Close to 157B; venation, close to 157B; with development, color becoming closer to 157A. Fully opened, lower surface: Close to 157B; venation, close to 157B; with development, color becoming closer to between 145D and 157B. Sepals.—Quantity and arrangement: Five, arranged in a single whorl. Length: About 3 mm. Width: About 1 mm. Shape: Oblong. Apex: Bluntly acute. Base: Cuneate. Margin: Entire. Texture and luster, upper surface: Smooth, glabrous; matte. Texture and luster, lower surface: Smooth, glabrous; slightly glossy. Color: When opening, upper surface: Close to N148C; towards the margins and apex, close to 182B. When opening, lower surface: Close to N148D tinged with close to 184C. Fully opened, upper surface: Close to N148B; towards the margins and apex, close to 182B. Fully opened, lower surface: Close to N148D tinged with close to 184C. Peduncles.—Length: About 21 cm. Diameter: About 3 mm. Aspect: About 15° from vertical; secondary peduncles, about 35° from main peduncle axis. Strength: Moderately weak. Texture and luster: Smooth, glabrous; glossy. Color: Close to 174A. Pedicels.—Length: About 1.1 cm. Diameter: About 0.5 mm. Aspect: About 35° from peduncle axis. Strength: Moderately strong. Texture and luster: Sparsely to moderately pubescent; slightly glossy. Color: Close to 148A to 148B. Reproductive organs.—Stamens: Quantity per flower: About twelve. Filament length: About 4 mm. Filament color: Close to NN155D. Anther shape: Double reniform. Anther size: About 0.5 mm by 0.6 mm. Anther color: Close to N77B. Pollen amount: Moderate. Pollen color: Close to 29B. Pistils: Quantity per flower: About three, occasionally two. Pistil length: About 2.5 mm. Stigma diameter: About 0.2 mm. Stigma shape: Club-shaped. Stigma color: Close to 145D. Style length: About 2.3 mm. Style color: Close to 145A. Ovary color: Close to N144A. Floral bracts: Quantity per flower: One. Length: About 1.3 cm. Diameter: About 4 mm. Shape: Ovate. Apex: Acute. Base: Broadly cuneate. Color, upper surface: Close to 147A; towards the base, close to 183B. Color, lower surface: Close to 183A. Seeds and fruits: To date, seed and fruit development have not been observed on plants of the new Saxifraga. Temperature tolerance: Plants of the new Saxifraga have been observed to tolerate temperatures ranging from about −7° C. to about 35° C. and to be suitable for USDA Hardiness Zones 8b through 11. Pathogen & pest resistance: To date, plants of the new Saxifraga have not been observed to be resistant to pathogens and pests common to Saxifraga plants.