Phlox plant named ‘Sunphlocobu ’

Abstract

A new and distinct cultivar of Phlox plant named ‘Sunphlocobu’, characterized by its compact and mounding plant habit; moderately vigorous growth habit; freely branching habit; pale violet-colored flowers with dark violet purple-colored central star; freely and continuous flowering habit; and good garden performance.

Description

Botanical designation: Phlox drummondii.

Cultivar denomination: ‘Sunphlocobu’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of Phlox, botanically known as Phlox drummondii and hereinafter referred to by the name ‘Sunphlocobu’.

The new Phlox is a product of a planned breeding program conducted by the Inventor in Shiga, Japan. The objective of the breeding program was to create new compact Phlox cultivars with attractive flower coloration.

The new Phlox originated from a cross-pollination made by the Inventor in June, 2002, in Shiga, Japan, of a proprietary selection of Phlox drummondii identified as code number 2Ph-45a, not patented, as the female, or seed, parent with a proprietary selection of Phlox drummondii identified as code number 2Ph-45b, not patented, as the male, or pollen, parent. The new Phlox was discovered and selected by the Inventor as a single flowering plant within the progeny of the stated cross-pollination in a controlled environment in Shiga, Japan.

Asexual reproduction of the new Phlox by vegetative cuttings in a controlled environment in Shiga, Japan since October, 2004, has shown that the unique features of this new Phlox are stable and reproduced true to type in successive generations.

SUMMARY OF THE INVENTION

The cultivar Sunphlocobu has not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment and cultural practices such as temperature and light intensity without, however, any variance in genotype.

The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘Sunphlocobu’. These characteristics in combination distinguish ‘Sunphlocobu’ as a new and distinct cultivar of Phlox:

• • 1. Compact and mounding plant habit.
  • 2. Moderately vigorous growth habit.
  • 3. Freely branching habit.
  • 4. Pale violet-colored flowers with dark violet purple-colored central star.
  • 5. Freely and continuous flowering habit.
  • 6. Good garden performance.

Compared to plants of the parent selections, plants of the new Phlox are more compact and differ in flower coloration.

Plants of the new Phlox can also be compared to plants of the cultivar Parona Light Blue, not patented. In side-by-side comparisons conducted in Shiga, Japan, plants of the new Phlox and the cultivar Parona Light Blue differed in the following characteristics:

• • 1. Plants of the new Phlox were more outwardly spreading than plants of the cultivar Parona Light Blue.
  • 2. Plants of the new Phlox were more freely branching than plants of the cultivar Parona Light Blue.
  • 3. Plants of the new Phlox had smaller leaves and flowers than plants of the cultivar Parona Light Blue.
  • 4. Plants of the new Phlox were more freely flowering than plants of the cultivar Parona Light Blue.
  • 5. Plants of the new Phlox and the cultivar Parona Light Blue differed in flower color.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying colored photographs illustrate the overall appearance of the new Phlox, 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 Phlox.

The photograph at the top of the sheet comprises a top perspective view of a typical flowering plant of ‘Sunphlocobu’ grown in a container.

The photograph at the bottom of the sheet is a close-up view of typical flowers of ‘Sunphlocobu’.

DETAILED BOTANICAL DESCRIPTION

The aforementioned photographs and following observations, measurements and values describe plants grown in Shiga, Japan, under commercial practice during the spring and summer in an outdoor nursery with day temperatures averaging 23° C. and night temperatures averaging 12° C. After planting, plants had been growing for about four months when the photographs and description were taken. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2001 Edition, except where general terms of ordinary dictionary significance are used.

• Botanical classification: Phlox drummondii cultivar Sunphlocobu.
• Parentage:
  • • Female, or seed, parent.—Proprietary selection of Phlox drummondii identified as code number 2Ph-45a, not patented.
    • Male, or pollen, parent.—Proprietary selection of Phlox drummondii identified as code number 2Ph-45b, not patented.
• Propagation:
  • • Type.—By vegetative cuttings.
    • Time to initiate roots.—About two to three weeks at 20° C. to 25° C.
    • Time to produce a rooted young plant roots.—About one to two months at 20° C. to 25° C.
    • Root description.—Fine, fibrous; ivory white to pale brown in color.
    • Rooting habit.—Freely branching.
• Plant description:
  • • Plant form/habit.—Compact and mounded plant habit; outwardly spreading; moderately vigorous growth habit. Freely branching habit; pinching enhances branching potential.
    • Plant height.—About 11.8 cm.
    • Plant width (spread).—About 24.2 cm.
    • Lateral branches.—Length: About 8.4 cm. Diameter: About 1.4 mm. Internode length: About 6 mm. Strength: Strong. Texture: Pubescent. Color: 145B.
• Foliage description:
  • • Arrangement.—Alternate, simple; sessile.
    • Length.—About 2.7 cm.
    • Width.—About 1 cm.
    • Shape.—Lanceolate.
    • Apex.—Acute.
    • Base.—Cordate.
    • Margin.—Entire.
    • Texture, upper and lower surfaces.—Pubescent.
    • Venation pattern.—Pinnate; reticulate.
    • Color.—Developing leaves, upper and lower surfaces: 145C. Fully expanded leaves, upper surface: 137C; venation, 137C. Fully expanded leaves, lower surface: 147B; venation, 147B.
• Flower description:
  • • Flower type/habit.—Single rotate hypocraterimorphous flowers arranged in terminal and axillary cymes; flowers face obliquely upward. Panicles conical in shape. Freely flowering habit with about 62 flower buds and flowers developing per plant.
    • Fragrance.—Moderate.
    • Natural flowering season.—Continuously flowering from spring to late autumn in Shiga, Japan. Flowers not persistent.
    • Postproduction longevity.—Flowers last about five days on the plant.
    • Flower buds.—Height: About 1.7 cm. Diameter: About 2.6 mm. Shape: Clavate. Color: 76B.
    • Inflorescence height.—About 2.8 cm.
    • Inflorescence diameter.—About 5 cm.
    • Flower diameter.—About 2.5 cm.
    • Flower depth.—About 1.6 cm.
    • Petals.—Quantity per flower: Typically five in a single whorl; petals fused at the base into a narrow tube. Length: About 1.1 cm. Lobe width: About 1.2 cm. Shape: Broadly rhombic. Apex: Obtuse. Margin: Entire. Texture, upper and lower surfaces: Smooth, glabrous. Color: Developing and fully expanded petals, upper surface; 85D to 155C; star, N81A; towards the throat, 155C. Developing and fully expanded petals, lower surface: 85D.
    • Sepals.—Quantity per flower: Typically five in a single whorl, fused at base; star-shaped calyx. Length: About 4.7 mm. Width: About 1.2 mm. Shape: Lanceolate. Apex: Acute. Margin: Entire. Texture, upper and lower surfaces: Smooth, glabrous. Color, upper and lower surfaces: 137C.
    • Peduncles.—Length: About 5.6 mm. Diameter: About 0.8 mm. Texture: Pubescent. Color: 145B.
    • Pedicels.—Length: About 3 mm. Diameter: About 0.4 mm. Texture: Smooth, glabrous. Color: 145B.
    • Reproductive organs.—Stamens: Quantity per flower: Typically five. Stamen length: About 5 mm to 10 mm. Anther shape: Linear. Anther size: About 2 mm by 0.4 mm. Anther color: 9A. Pollen amount: Moderate. Pollen color: 13A. Pistils: Quantity per flower: One. Pistil length: About 5 mm. Stigma shape: Three-parted. Stigma color: 1B. Style color: 145C. Ovary color: 138A.
    • Seed/fruit.—Seed and fruit development have not been observed.
• Disease/pest resistance: Plants of the new Phlox have not been noted to be resistant to pathogens and pests common to Phlox.
• Garden performance: Plants of the new Phlox have been observed to have good garden performance and tolerate rain, wind and temperatures from about 0° C. to about 35° C.

Claims

1. A new and distinct Phlox plant named ‘Sunphlocobu’ as illustrated and described.