Heuchera plant named ‘Plum Power’

Abstract

A new cultivar of hybrid Heuchera named ‘Plum Power’, characterized by its unique foliage with leaves that are purple in color with a silver sheen, its large leaves, and its re-blooming habit; blooming from April to November in The Netherlands.

Claims

1. A new and distinct cultivar of hybrid Heuchera plant named ‘Plum Power’ as herein illustrated and described.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The accompanying colored photographs illustrate the overall appearance and distinct characteristics of the new Heuchera. The photographs were taken of a plant two years in age as grown outdoors in a 25-cm container in Hillegom, The Netherlands.

(2) The photograph in FIG. 1 provides a side view of the plant habit and foliage coloration of ‘Plum Power’.

(3) The photograph in FIG. 2 provides a close-up view of an inflorescence of ‘Plum Power’.

(4) The photograph in FIG. 3 provides a close-up view of a leaf of ‘Plum Power’.

(5) The colors in the photographs are as close as possible with the digital photography techniques available, the color values cited in the detailed botanical description accurately describe the colors of the new Heuchera.

DETAILED BOTANICAL DESCRIPTION OF THE PLANT

(6) The following is a detailed description of 2-year-old plants of the new cultivar as grown outdoors in 25-cm containers in Hillegom, The Netherlands. The phenotype of the new cultivar may vary with variations in environmental, climatic, and cultural conditions, as it has not been tested under all possible environmental conditions. The color determination is in accordance with The 2015 R.H.S. Colour Chart of The Royal Horticultural Society, London, England, except where general color terms of ordinary dictionary significance are used. General description: Blooming period.—Re-blooming from April to November in The Netherlands. Plant type.—Herbaceous perennial. Plant habit.—Clump-forming, mounded foliage. Height and spread.—Average of 25 cm in height to top of foliage and 35 cm in height to top of inflorescences and an average of 42 cm in width. Hardiness.—At least in U.S.D.A. Zone 3. Diseases and pests.—Not more susceptible to pests and diseases than other Heuchera varieties. Root description.—Fibrous roots on woody rootstalks. Branching habit.—Basal rosette, no lateral branches. Basal branching.—No lateral stems only basal rosettes. Propagation.—In vitro propagation is the preferred method, stem cuttings are also possible. Root development.—An average of 2 months for a tissue culture plantlet to fully root in a 72-cell liner. Growth rate.—Vigorous. Foliage description: Leaf shape.—Broad ovate to near orbicular. Leaf division.—Simple. Leaf base.—Hastate, lobes touching to slightly overlapping. Leaf apex.—Very short and abruptly acute. Leaf venation.—Reticulate, 200B, slightly fading to 197A in color on upper surface, 186B in color on lower surface. Leaf margins.—Lobed with an average of 7 lobes per leaf, lobe margins crenate with abrupt acute tips on every tooth, moderately undulated. Leaf attachment.—Petiolate. Leaf arrangement.—Alternate, basal rosettes. Leaf orientation.—Typically nearly horizontal to slightly cupped under. Leaf surface.—Upper surface matte, lower surface moderately glossy, both sides moderately covered with short hairs; upper surface hairs are 0.3 mm in length and too small to measure color, lower surface hairs are 0.5 mm in length and too small to measure color. Leaf color.—Young upper surface; between 183C and 187A, young lower surface; 187B to 187C, mature upper surface; N77D, fading between 195A and 197B in fall, mature lower surface; 187B, fading to 187C in fall. Leaf size.—Average of 12.2 cm in length and 11.4 cm in width. Leaf quantity.—15 per basal rosette. Petioles.—Round in shape, average of 13.5 cm in length and 3 mm in width, color; N187D, surface is densely covered with soft very short hairs an average of 0.3 mm in length and too small to measure color. Stipules.—Small leafy stipules at the base of each leaf, laciniate apex, with an average of 1.5 cm in length and 5 mm in width, 71A in color, surfaces are densely covered with short strigose hairs; an average of 1.5 mm in length and 156D in color. Flower description: Inflorescence type.—Axillary compound spike. Inflorescence size.—An average of 39.8 cm in height from base of peduncle to top, 9.6 cm in height from the lowest flower to the top and 4.3 cm in width. Inflorescence number.—An average of 3 compound spikes per 25-cm container at one time, moderate flower density. Flower fragrance.—None. Flower quantity.—Average of 75 per inflorescence. Flower lastingness.—Average of one week, self cleaning. Flower buds.—Obovate in shape, an average of 3.5 mm in diameter and 2 mm in length, 185C to 185D, top 158B to 158C in color. Flower aspect.—Outward to slightly drooping. Flower type.—Single, campanulate. Flower size.—About 6 mm in depth and 6 mm in diameter. Petals.—Average of 5, rotate arrangement and implanted in the hypanthium at base, oblanceolate in shape, margin is entire, apex is narrowly acute, upper and lower surface is matte and glabrous, color when opening and fully upper and lower surface NN155D, about 2.5 mm in length and 0.4 mm in width. Calyx.—Campanulate, sepals fused to hypanthium, 4 mm in length and diameter. Sepals.—5, fused into hypanthium, elliptic in shape, about 4 mm in length and 1 mm in width, margin is entire fused into hypanthium, apex is broadly acute, fused base, upper surface is matte, lower surface is densely covered with very short glandular hairs an average of 0.2 mm in length and too small to measure color, color; immature and mature upper surface 69C to 69D, tip is 146D, immature lower surface 185C to 185D, tip is 158B to 158C, mature lower surface 69C to 69D, base 181D. Bracts.—None observed. Peduncles.—Moderate in strength, primary peduncle; average of 39 cm in length and 2 mm in diameter, moderate strength, held at a 70° angle (straight on top of flowering stem), color of both surfaces; 183A to 183B, secondary peduncles; average of 8 mm in length, 0.8 mm in diameter, held at a 50° (0°=straight upright) to primary peduncle, color of both surfaces; 183A to 183B, surface moderately covered with short strigose hairs an average of 0.5 mm in length and 156D in color. Pedicels.—Moderate in strength, average of 2 mm in length and 0.5 mm in diameter, color 199D, pedicel of primary flower of each spikelet straight on top of secondary pedicel, pedicels of secondary and tertiary flowers of each spikelet in an average angle of 45° (0°=straight on top of secondary peduncle), surface pubescent. Reproductive organs: Gynoecium.—Pistil; 2, stigma; 2 mm in length, pointed in shape, 1.8 mm in length and NN155A in color, style; 1.8 mm in length, NN155A in color, ovaries; 157D in color. Androcoecium.—Stamens; 5, anthers; triangular in shape, about 0.5 mm in length and 168C in color, filament 3 mm in length and NN155D in color, no pollen was observed. Seed/fruit.—No fruit or seeds detected to date.