<i>Amsonia </i>plant named ‘Verdant Venture’

Abstract

A new cultivar of Amsonia plant named ‘Verdant Venture’ that is characterized by its flower clusters that are held above the foliage and are not partially masked by the foliage, its petals that are short and broad in size, its lower growing plant habit, its narrow foliage and stems, its leaf margins that are strongly rolled inward, its stems that are finely pubescent.

Claims

1. A new and distinct cultivar of Amsonia plant named ‘Verdant Venture’ 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 Amsonia. The photographs were taken of ‘Verdant Venture’ as grown in a trial garden in Glencoe, Ill.

(2) The photograph in FIG. 1 provides a view of the plant habit of a 6-year-old plant of ‘Verdant Venture’ in peak bloom.

(3) The photograph in FIG. 2 provides a close-up view of inflorescences of ‘Verdant Venture’.

(4) The photograph in FIG. 3 provides a view of the foliage of a 6-year-old plant of ‘Verdant Venture’ in summer.

(5) The photograph in FIG. 4 provides a view of the foliage coloration of a 5-year-old plant of ‘Verdant Venture’ in the fall.

(6) 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 Amsonia.

DETAILED BOTANICAL DESCRIPTION OF THE PLANT

(7) The following is a detailed description of one-year-old plants of the new cultivar as grown in 4-inch containers in Glencoe, Ill. 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.—Average of three weeks; commencing in early to mid-May and finishing in late May to early June in northern Illinois. Plant habit.—Low-growing mound. Height and spread.—Average of 32 cm in height and 17 cm in width for one-year-old potted plants, 44 cm in height and 70 cm in width for in-ground trial plants four years in age, 53 cm in height and 94 cm in width for in-ground trial plants six years in age, and 71 cm in height and 1.39 m in width for in-ground trial plants ten years in age. Hardiness.—At least in U.S.D.A. Zones 4 to 8. Diseases and pests.—No susceptibility or resistance to pests or diseases has been observed. Root description.—Fibrous, 162A in color. Growth rate.—Vigorous. Propagation.—Shoot tip and entire shoot cuttings. Root development.—Root initiation occurs in an average of one month and a rooted cutting will produce a plant with 3 to 5 stems in a one-quart pot in 12 months. Stem description: Stem size.—An average of 30 cm in length and 2 mm in width. Stem shape.—Quadrilateral. Stem strength.—Strong. Stem color.—144A. Stem surface.—Matte, sparsely fine pubescent. Stem aspect.—Held upright to slightly outward. Internode length.—An average of 4 mm. Branching habit.—An average of 20 stems from base, each flowering stem producing a single inflorescence. Foliage description: Leaf shape.—Linear. Leaf division.—Simple. Leaf base.—Clasping. Leaf apex.—Narrowly acute. Leaf venation.—Parallel, inconspicuous, matches leaf color on upper and lower surfaces. Leaf margins.—Entire, strongly rolled inward, no pubescence. Leaf attachment.—Sessile. Leaf arrangement.—Opposite and whorled. Leaf surface texture.—Glabrous and dull on upper and lower surfaces. Leaf color (both surfaces).—Young foliage; 143B, mature foliage; 143A, fall foliage; N144B to N144C and 150A to 150B. Leaf size.—Up to 5 cm in length and 1.5 mm in width. Leaf quantity.—An average of 120 leaves per stem. Leaf fragrance.—None. Flower description: Inflorescence type.—Panicle on terminus of main stems, one per lateral branch unless pinched. Lastingness of inflorescence.—About 3 to 4 weeks from the opening of the first flower to senescence of last flower, individual flower lasts about 5 days. Inflorescence size.—An average of 6 cm in height and 4 cm in diameter. Flower fragrance.—Light floral scent. Flower number.—An average of 8 per inflorescence. Flower aspect.—Upright to outward. Flower bud.—Spatulate in shape, acute apex, an average of 1 cm in length and 2 mm in width, color; 92B and calyx portion 93 and 144A, surface is glabrous. Flower form.—Salverform. Flower size.—An average of 1.5 cm in height and diameter. Corolla tube.—An average of 5 mm in length and 2 mm in width, color; N155A, outer surface glabrous, inner surface densely covered with woolly pubescence, up to 2 mm in length and NN155A in color, mouth of corolla tube visible and a distinct band of N155A. Corolla lobes.—5, narrowly ovate in shape, held nearly horizontally when fully open, slightly overlapping, an average of 1 cm in length and 3 mm in width, apex bifid with a cleft 1 mm in depth and 0.5 mm in width, apex of lobes rounded, base broadly cuneate and fused to tube, entire margins, color; when opening inner and outer surfaces center portion 97D, margins 97B, tip 97A, when fully open inner and outer surface base 97D and 91D, center portion and margins 97B. Calyx.—Campanulate in form, comprised of fused sepals with linear shaped sepal tips free, an average of 1 mm in length and 1.5 mm in width. Sepals.—5, primarily fused with free tips, linear in shape, entire margins, fused base (about 90%), aristulate apex, an average of 2 mm in length and 0.5 mm in width, inner surface texture; glabrous and shiny, outer surface texture; glabrous and matte, 146A in color. Peduncles.—Rounded in shape, an average of 2 cm in length and 1 mm in width, held upright to outward, glabrous and slightly glossy surface, 146A in color. Pedicels.—Rounded in shape, an average of 1 cm in length and 1 mm in width, held upright to outward, glabrous and slightly glossy surface, 146A in color. Reproductive organs: Gynoecium.—1 pistil, 5 mm in length; stigma; rounded, N144A, style is about 4 mm in length, and NN155B in color, ovary; superior, round in shape, about 1 mm in length, 144A in color. Androecium.—5 stamens; anthers; dorsifixed, heart-shaped, an average of 1 mm in length, and 202A in color, filaments; fused petals, an average of 0.5 mm in length and 155A in color, pollen is moderate in quantity and 16A in color. Seeds.—None observed to date.