<i>Chrysanthemum </i>plant named ‘G21POS04YE’

Abstract

A new and distinct cultivar of Chrysanthemum plant named G21POS04YE, characterized by its upright, outwardly spreading and uniformly rounded plant habit; moderately vigorous growth habit; freely branching habit; dense and full plant habit; flexible stems; dark green-colored leaves; uniform and freely flowering habit; long flowering period; spider decorative-type inflorescences with quilled ray florets that are bright yellow in color; and excellent garden performance.

Claims

1. A new and distinct Chrysanthemum plant named G21POS04YE as illustrated and described.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPH

(1) The accompanying photograph illustrates the overall appearance of the new Chrysanthemum plant showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type.

(2) The photograph comprises a side perspective view of a typical flowering plant of G21POS04YE grown in a container.

DETAILED BOTANICAL DESCRIPTION

(3) The aforementioned photograph and following observations and measurements describe plants grown in 19-cm containers in an outdoor nursery in Oostnieuwkerke, Belgium under natural daylengths during the autumn and under cultural practices generally used in commercial Chrysanthemum production. During the production of the plants, day temperatures ranged from 20 C. to 25 C. and night temperatures ranged from 12 C. to 18 C. Plants were 20 weeks old when the photograph and detailed 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: Chrysanthemum X morifolium G21POS04YE. Parentage: Naturally-occurring whole plant mutation of Chrysanthemum X morifolium G20POS01WH, disclosed in a U.S. Plant Patent application filed concurrently having application Ser. No. 16/873,478. Propagation: Type cutting.By vegetative tip cuttings. Time to initiate roots, summer.About two weeks at temperatures about 20 C. Time to initiate roots, winter.About 20 days at temperatures about 20 C. Time to produce a rooted young plant, summer.About 30 days at temperatures about 20 C. Time to produce a rooted young plant, winter.About 40 days at temperatures about 20 C. Root description.Fine, 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. Rooting habit.Freely branching; medium density. Plant description: Appearance.Perennial spider-type Chrysanthemum with quilled ray florets; stems upright and outwardly spreading giving a uniformly rounded appearance to the plant; plants roughly spherical; very freely branching habit, about 25 to 30 primary lateral branches develop, each primary lateral branch with multiple secondary branches; pinching enhances lateral branch development; dense and full plant habit; moderately vigorous growth habit; moderate growth rate; plants flexible, not brittle. Plant height.About 40 cm. Plant width.About 50 cm. Lateral branches.Length: About 25 cm. Diameter: About 2 mm to 3 mm. Internode length: About 2 cm. Strength: Moderately strong, flexible. Texture: Pubescent, fine; longitudinally ridged. Color: Close to 147C. Leaves.Arrangement: Alternate, simple. Length: About 3 cm to 5 cm. Width: About 2.5 cm to 3 cm. Apex: Rounded to cuspidate. Base: Attenuate. Margin: Palmately lobed and serrate, sinuses between lateral lobes divergent to parallel. Texture, upper and lower surfaces: Slightly pubescent. Venation: Palmately reticulate. Color: Developing leaves, upper surface: Close to 137C. Developing leaves, lower surface: Close to 137D. Fully expanded leaves, upper surface: Close to N137C; venation, close to 148C. Fully expanded leaves, lower surface: Close to 147B; venation, close to 147B to 147C. Petioles: Length: About 1 cm. Diameter: About 2 mm. Texture, upper and lower surfaces: Slightly pubescent; slightly rough. Color, upper surface: Close to 146C. Color, lower surface: Close to 146D. Stipules: Length: About 1 cm. Diameter: About 2 mm. Texture, upper and lower surfaces: Slightly pubescent. Color, upper and lower surfaces: Close to 137A. Inflorescence description: Appearance.Spider decorative-type inflorescence form; inflorescences borne on terminals above foliar plane; disc and ray florets arranged acropetally on a capitulum. Fragrance.Slightly fragrant, pungent. Flowering response.Under natural season conditions, plants flower in late September in Belgium; flowering response time, about 35 days. Postproduction longevity.Inflorescences maintain good color and substance for about 42 days; inflorescences persistent. Quantity of inflorescences.About 30 to 35 inflorescences develop per lateral branch. Inflorescence buds.Height: About 8 mm. Diameter: About 1.3 cm. Shape: Globular. Color: Close to 7B. Inflorescence diameter.About 5 cm. Inflorescence depth (height).About 3.5 cm. Disc diameter.About 3 mm; inconspicuous. Receptacle diameter.About 3 mm. Receptacle height.About 2.5 mm to 3 mm. Receptacle color.Close to 144B. Ray florets.Number of ray florets per inflorescence: About 150 to 200 arranged in about ten whorls. Length: About 3.5 cm to 5 cm. Width: About 7 mm. Shape: Quilled, tubular. Apex: Rounded. Base: Fused. Aspect: Mostly horizontal. Texture and luster, upper and lower surfaces: Smooth, glabrous; matte. Color: When opening, upper and lower surfaces: Close to 13B. Fully opened, upper and lower surfaces: Close to 12A; venation, close to 12A; color becoming closer to 12C with development. Disc florets.Number of disc florets per inflorescence: About 20 massed at the center of the inflorescence. Length: About 3 mm. Diameter: About 0.5 mm to 1 mm. Shape: Tubular; apices dentate. Texture and luster: Smooth, glabrous; glossy. Color, immature: Close to 145A. Color, mature: Close to 12A. Phyllaries.Number of phyllaries per inflorescence: About 25 arranged in two or three whorls. Length: About 4 mm to 6 mm. Width: About 2 mm to 3 mm. Shape: Ovate. Apex: Rounded. Base: Rounded to truncate. Margin: Entire. Texture, upper and lower surfaces: Smooth, glabrous. Color, upper surface: Close to 137A. Color, lower surface: Close to N137B. Peduncles.Length, terminal peduncle: About 5 cm. Length, fourth peduncle: About 5 cm. Length, seventh peduncle: About 5 cm. Diameter: About 2 mm. Angle: About 30 from vertical. Strength: Moderately strong. Texture: Slightly pubescent. Color: Close to 147C. Reproductive organs.Androecium: Stamen development has not been observed on inflorescences of the new Chrysanthemum. Gynoecium: Pistil development has not been observed on inflorescences of the new Chrysanthemum. Seeds and fruits.To date seed and fruit production have not been observed on plants of the new Chrysanthemum. Garden performance: Plants of the new Chrysanthemum have demonstrated excellent garden performance and will tolerate temperatures ranging from about 1 C. to about 45 C.