<i>Hydrangea </i>plant named ‘GRYPAST05’

Abstract

A new cultivar of Hydrangea paniculata plant named GRYPAST05 that is characterized by its inflorescences with sterile flower sepals that are creamy white in color and remain creamy white as they mature, its inflorescences with sterile flower sepals that are star-shaped, its compact plant habit, and its strong flower stems.

Claims

1. A new and distinct cultivar of Hydrangea plant named GRYPAST05 substantially 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 Hydrangea. The photographs were taken of a two-year-old plant of GRYPAST05 as grown outdoors in a 27-cm container in Boskoop, The Netherlands.

(2) The photograph in FIG. 1 provides a side view of the plant habit of GRYPAST05 in bloom.

(3) The photograph in FIG. 2 provides a close-up view of the inflorescences of GRYPAST05.

(4) The photograph in FIG. 3 provides a close-up view of a leaf of GRYPAST05.

(5) The colors in the photographs are as close as possible with the photographic and printing technology utilized and the color values cited in the detailed botanical description accurately describe the colors of the new Hydrangea.

BOTANICAL DESCRIPTION OF THE PLANT

(6) The following is a detailed description of two-year-old plants of GRYPAST05 as grown outdoors in 27-cm containers in Boskoop, 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 Colour Chart of The Royal Horticultural Society, London, England, except where general color terms of ordinary dictionary significance are used. General description: Blooming period.July to September in The Netherlands. Plant type.Upright, slightly spreading, and compact. Height and spread.Reaches 130 cm in height and 80 cm in spread as a mature plant in the landscape. Hardiness.At least in U.S.D.A. Zones 4 to 9. Diseases and pests.No susceptibility and resistance to diseases or pests has been observed. Root description.Fine, fibrous and dense, NN155A and 164A in color. Propagation.Stem cuttings. Root development.6 to 8 weeks for root initiation with a finished plant produced in about 12 months from a rooted cutting in a P9 container. Growth rate and vigor.Moderate to high. Stem description: Stem shape.Rounded. Stem strength.Strong. Stem color.Young; 145A to 145B, mature; N199B, old bark; 197B to 197C. Stem size.Average of 46.6 cm in length (excluding inflorescence) and 7 mm in diameter. Stem surface.Young stems are matte and densely covered with stiff hairs, average of 0.5 mm in length and match surface color, mature stems are matte and moderately covered with lenticels that are an average of 1.5 mm in length and 0.75 mm in diameter, 164D in color, fasciation absent. Stem aspect.Upright, average of 55 to soil level, varying between 40 and 90. Internode length.An average of 6 cm. Branching.Freely branching with an average of 16 lateral branches. Foliage description: Leaf shape.Elliptic to ovate. Leaf arrangement.Opposite or in whorls of three. Leaf division.Simple. Leaf base.Attenuate. Leaf apex.Narrow apiculate. Leaf margins.Serrate, lobing absent. Leaf venation.Pinnate, color; upper surface 148A, lower surface 146D. Leaf size.An average of 11.3 cm in length and 6 cm in width. Leaf attachment.Petiolate. Leaf number.An average of 16 per lateral stem. Leaf surface.Both surfaces; smooth and very slightly rugose, upper surface moderately covered with short strigose hairs, lower surface main veins and secondary veins moderately covered with short strigose hairs, an average of 0.4 mm in length and 157A in color. Leaf color.Young upper surface; 144A, young lower surface 144B, mature upper surface; NN137C, mature lower surface; 147B, non-variegated. Petioles.An average of 1.7 cm in length and 2.5 mm in diameter, upper surface color 144B, proximal end 146A to 146B, lower surface color 144B, proximal end 146B, both surfaces matte and sparsely covered with very short hairs an average of 0.3 mm in length and too small to measure color. Inflorescence description: Inflorescence type.Terminal conical panicle, comprised of sterile flowers above inconspicuous fertile flowers. Lastingness of inflorescence.Sterile flowers; persistent for an average of 6 weeks, fertile flowers; self-cleaning, an average of 5 days. Inflorescence number.One per lateral stem. Inflorescence size.An average of 22.7 cm in height and 18.3 cm in diameter. Flower number.An average of 450 sterile flowers and 200 fertile flowers per panicle. Flower fragrance.Moderate, sweet and pleasant. Flower aspect.Sterile flowers; held upright to outward and slightly drooping, fertile flowers; held upright from peduncle. Flower size.Sterile flowers; up to 4.2 cm in diameter and 1.2 cm in depth, fertile flowers; an average of 1.3 cm in diameter and 7 mm in depth. Flower type.Sterile flowers single, rotate, fertile flowers rotate, dropped when mature. Flower buds.Sterile flowers; an average of 5 mm in length and 1.3 cm in diameter, broadly cup-shaped, 145C and 145D in color, fertile flowers; an average of 3.5 mm in length, 3 mm in diameter, obovate in shape, color; 157D, immature calyx 193A to 193B. Petals.Sterile flowers; 5 (occasionally 4), ovate to concave in shape, acute apex, entire margins, cuneate base, up to 3.5 mm in length and 2 mm in width, upper surface glabrous and slightly glossy, lower surface glabrous and matte, color when opening and fully open upper and lower surface NN155D, fertile flowers; 5, rotate in shape, ovate to concave in shape, acute apex, cuneate base, entire margins, average of 4 mm in length and 2.5 mm in width, both surfaces glabrous, upper surface slightly glossy, lower surface matte, color; when opening and fully open upper and lower surface NN155D, petals drop at maturity. Peduncles.Primary peduncles; strong, flattened oval in shape, an average of 3 cm in length and 2 mm in width. secondary peduncles 2 cm in length and 2 mm in width, 157A in color, surface is matte and moderately covered with thin pubescence an average of 0.3 mm in length and 145D in color. Pedicels.Sterile flowers; moderate strength, an average of 2.6 cm in length and 1 mm in width, 157A in color, surface is pubescent, held at a 50 angle, 145D in color, surface is matte and moderately covered with thin pubescence an average of 0.3 mm in length and 157D in color, fertile flowers; moderate strength, an average of 2 mm in length, 0.5 mm in diameter, held at a 30 angle, 145D in color, surface is matte and densely covered with thin pubescence an average of 0.3 mm in length and 145D in color. Sepals.Sterile flowers; 4 (occasionally 5), rotate, elliptic to obovate and ovate, slightly concave and carinate in shape, obtuse apex, obtuse to short attenuate base, entire margins, up to 2.4 cm in length and 1.8 cm in width, both surfaces; glabrous and matte, color; upper and lower surface when opening 155C, upper and lower surface when fully open 155A, maturing flower color; upper surface changing to 145B, lower surface changing to 145B and 145C, fertile flowers; 5, rotate, broadly deltoid in shape, broad acuminate apex, broad cuneate base, entire margins, 1 mm in length, 1.5 mm in width, both surfaces glabrous and matte, color; when opening upper surface 193B, when opening lower surface 193A to 193B, when fully open upper surface and lower surface 145C. Bracts.1 present on each pedicel, narrow elliptic in shape, acute apex, acute base, entire margins, 1.2 cm in length, 4 mm in width, both surfaces 145B in color. Reproductive organs: Gynoecium.Sterile flowers; 1 pistil, an average of 1 mm in length, stigma; pointed in shape and 157D in color, style; 0.5 mm in length, 150D in color, ovary; 150D in color, fertile flowers; 3 pistils, an average of 2 mm in length, stigma; club-shaped and 157D in color, style; 1 mm in length, 150D in color, ovary is 150D in color. Androecium.Sterile flowers; stamens; average of 8, filaments; 3 mm in length and NN155D in color, anthers; broad oblong in shape, 0.5 mm in length, 155D in color, pollen; moderate in quantity, 156C in color, fertile flowers; stamens; average of 10, filaments; 6 mm in length, NN155D in color, anthers; broad oblong in shape, 0.5 mm in length, 155D in color, pollen; moderate quantity, 156C in color. Fruit and seed.None observed to date.