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Hibiscus plant named `Boreas`
PP21618 Hibiscus plant named `Boreas`
Patent Drawings:Drawing: PP21618-4    
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Inventor: Graff
Date Issued: January 11, 2011
Application: 12/589,046
Filed: October 16, 2009
Inventors: Graff; Poul (Sabro, DK)
Assignee: Graff Breeding A/S (Sabro, DK)
Primary Examiner: Para; Annette H
Assistant Examiner:
Attorney Or Agent: Whealy; C. A.
U.S. Class: PLT/257
Field Of Search: PLT/257
International Class: A01H 5/00
U.S Patent Documents:
Foreign Patent Documents:
Other References:

Abstract: A new and distinct cultivar of Hibiscus plant named `Boreas`, characterized by its upright, somewhat, outwardly spreading and dense and bushy plant habit; glossy dark green-colored leaves; uniform and freely flowering habit; large pale yellow-colored flowers with dark red-colored centers; and good flower longevity.
Claim: It is claimed:

1. A new and distinct Hibiscus plant named `Boreas` as illustrated and described.
Description: Botanical designation: Hibiscusrosa-sinensis.

Cultivar denomination `Boreas`.


The present invention relates to a new and distinct cultivar of Hibiscus plant, botanically known as Hibiscus rosa-sinensis, and hereinafter referred to by the name `Boreas`.

The new Hibiscus plant is a product of a planned breeding program conducted by the Inventor in Sabro, Denmark. The objective of the breeding program is to create new strong Hibiscus plants with attractive and long-lasting flowers.

The new Hibiscus plant originated from an open-pollination in August, 2006 in Sabro, Denmark of Hibiscus rosa-sinensis `Caribbean Apricot`, not patented, as the female, or seed, parent with an unknown selection of Hibiscus rosa-sinensis as themale, or pollen, parent. The new Hibiscus plant was discovered and selected by the Inventor as a flowering plant within the progeny of the stated open-pollination in a controlled greenhouse environment in Sabro, Denmark in June, 2007.

Asexual reproduction of the new Hibiscus plant by vegetative terminal cuttings in a controlled greenhouse environment in Sabro,

Denmark since September, 2007, has shown that the unique features of this new Hibiscus plant are stable and reproduced true to type in successive generations.


Plants of the new Hibiscus have 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, anyvariance in genotype.

The following traits have been repeatedly observed and are determined to be the unique characteristics of `Boreas`. These characteristics in combination distinguish `Boreas` as a new and distinct cultivar of Hibiscus: 1. Upright, somewhat,outwardly spreading and dense and bushy plant habit. 2. Glossy dark green-colored leaves. 3. Uniform and freely flowering habit. 4. Large pale yellow-colored flowers with dark red-colored centers. 5. Good flower longevity.

Plants of the new Hibiscus can be compared to plants of the female parent, `Caribbean Apricot`. Plants of the new Hibiscus differ primarily from plants of `Caribbean Apricot` in flower longevity as flowers of plants of the new Hibiscus lastabout three to five days whereas flowers of plants of `Caribbean Apricot` last about one to two days.

Plants of the new Hibiscus can be compared to plants of the Hibiscus rosa-sinensis `Cairo White`, not patented. In side-by-side comparisons conducted in Sabro, Denmark, plants of the new Hibiscus differed from plants of `Cairo White` in thefollowing characteristics: 1. Plants of the new Hibiscus were more freely branching than plants of `Cairo White`. 2. Plants of the new Hibiscus had wider leaves than plants of `Cairo White`. 3. Plants of the new Hibiscus had broader flowers budsthan plants of `Cairo White`. 4. Plants of the new Hibiscus had larger flowers than plants of `Cairo White`. 5. Flowers of plants of the new Hibiscus and `Cairo White` differed slightly in color. 6. Flowers of plants of the new Hibiscus lastedabout four to five days whereas flowers of plants of `Cairo White` lasted about one day.


The accompanying colored photograph illustrates the overall appearance of the new Hibiscus plant, showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photograph may differslightly from the color values cited in the detailed botanical description which accurately describe the colors of the new Hibiscus plant. The photograph comprises a side perspective view of typical flowering plants of `Boreas` grown in a container.


The aforementioned photograph and following observations, measurements and values describe plants grown in Sabro, Denmark in 12-cm containers in a glass-covered greenhouses during the summer under conditions which closely approximate commercialHibiscus production. During the production of the plants, day temperatures ranged from C. to C., night temperatures ranged from C. to C. and light levels ranged from 40 to 50 klux. Plants were 22 weeksold when the photograph and the description were taken. In the description, color references are made to The Royal Horticultural Society Colour Chart, 2001 Edition, except where general terms of ordinary dictionary significance are used. Botanicalclassification: Hibiscus rosa-sinensis `Boreas`. Parentage: Female, or seed, parent.--Hibiscus rosa-sinensis `Caribbean Apricot`, not patented. Male or pollen parent.--Unknown selection of Hibiscus rosa-sinensis, not patented. Propagation: Type.--Byvegetative terminal cuttings. Time to initiate roots, summer.--About three weeks at temperatures of C. Time to initiate roots, winter.--About four weeks at temperatures of C. Time to produce a rooted young plant, summer.--Abouteight weeks at temperatures of C. Time to produce a rooted young plant, winter.--About ten weeks at temperatures of C. Root description.--Medium in thickness, fleshy; color, close to 158A. Rooting habit.--Freely branching; dense. Plant description: Plant and growth habit.--Upright, somewhat outwardly spreading and dense and bushy plant habit; moderately vigorous growth habit. Branching habit.--Freely branching, usually about five to eight lateral branches develop; pinchingenhances lateral branch development. Plant height.--About 35 cm to 55 cm. Plant diameter (area of spread).--About 35 cm to 55 cm. Lateral branch description: Length.--About 18 cm to 30 cm. Diameter.--About 4 mm to 8 mm. Internode length.--About 1 cmto 5 cm. Strength.--Strong. Texture.--Woody. Color.--Close to N198A. Foliage description: Arrangement.--Alternate, single; numerous; symmetrical. Length.--About 6 cm to 9 cm. Width.--About 6 cm to 10 cm. Shape.--Cordate. Apex.--Acute. Base.--Obtuse, cordate. Margin.--Crenate. Texture, upper and lower surfaces.--Smooth, glabrous. Luster, upper surface.--Glossy. Luster, lower surface.--Matte. Venation pattern.--Pinnate; arcuate. Color.--Developing leaves, upper surface: Close to135A. Developing leaves, lower surface: Close to 137C. Fully expanded leaves, upper surface: Close to 139A; venation, close to 138A. Fully expanded leaves, lower surface: Close to 137A; venation, close to 138B. Petiole.--Length: About 2 cm to 5 cm. Diameter: About 2 mm. Texture, upper and lower surfaces: Smooth, glabrous. Color, upper surface: Close to 138A. Color, lower surface: Close to 138B. Flower description: Flower arrangement.--Flowers arranged singly at terminal leaf axils. Uniform,continuous and freely flowering habit with numerous flower buds and/or open flowers per plant at one time; flowers face mostly upright to slightly outwardly. Flower appearance.--Rounded, pale yellow-colored flowers with red-colored centers. Fragrance.--None detected. Flower longevity.--Good flower longevity, flowers last for about four to five days; flowers persistent. Natural flowering season.--Usually spring and summer or during periods of warm weather; plants flower year-round in thegreenhouse. Flower diameter.--About 16 cm to 20 cm. Flower length (height).--About 11 cm. Flower bud.--Rate of opening: Flowers buds open in about three days. Length: About 7 cm to 9 cm. Diameter: About 2 cm to 3 cm. Shape: Ovate to lanceolate. Color: Close to 154C. Petals.--Arrangement: Corolla consists of five petals that are fused at base; petals imbricate. Length: About 10 cm to 11 cm. Width: About 9 cm to 10 cm. Shape: Obovate. Apex: Rounded. Base: Attenuate. Margin: Entire,undulate. Texture: Glabrous; rugose. Color: When opening, upper surface: Close to 2D; towards the base, close to 53A. When opening, lower surface: Close to 2D. Fully opened, upper surface: Close to 4D; towards the base, close to 53A. Fully opened,lower surface: Close to 2D. Sepals.--Appearance: Five sepals fused into a tubular star-shaped calyx. Length: About 3.5 cm. Width: About 1.2 cm. Shape: Lanceolate. Apex: Acuminate. Margin: Entire. Texture, upper surface: Rough. Texture, lowersurface: Smooth. Color, upper surface: Close to 144A. Color, lower surface: Close to 145A. Peduncles.--Length: About 3 cm to 4 cm. Diameter: About 3 mm. Angle: About to from the lateral branch axis. Strength: Strong. Texture: Smooth, glabrous. Color: Close to 144A. Reproductive organs.--Androecium: Stamen number: Numerous, about 100. Filament length: About 4 mm to 5 mm. Filament color: Close to 155D. Anther shape: Rounded to ovate. Anther length: About 1 mm to2 mm. Anther color: Close to 21D. Amount of pollen: Abundant. Pollen color: Close to 21A. Gynoecium: Pistil length: About 10 cm. Style length: About 9 cm. Style texture: Smooth, waxy. Style color: Close to 46A. Stigma appearance: Five-parted,rounded. Stigma color: Close to 12B. Ovary color: Close to 145A. Seeds.--Quantity produced per flower: About one to twelve. Length: About 4 mm. Diameter: About 4 mm. Color: Close to 202A. Temperature tolerance: Plants of the new Hibiscus have beenobserved to have tolerate temperatures from about C. to about C. Pathogen/pest resistance: Plants of the new Hibiscus have not been observed to be resistant to pathogens and pests common to Hibiscus.

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