Petunia plant named ‘Keiwhihus’

Genus and species: Petunia hybrida Vilm.

Variety denomination: ‘Keiwhihus’.

The present invention comprises a new and distinct cultivar of petunia, botanically known as Petunia hybrida Vilm., and hereinafter referred to by the cultivar name ‘Keiwhihus’. The new cultivar originated from a hybridization made in October 2000 in Katori, Chiba, Japan. The female parent was a proprietary unnamed petunia plant (unpatented), while the male parent was a different proprietary unnamed petunia plant (unpatented).

The new cultivar was created in 2000 in Katori, Chiba, Japan and has been asexually reproduced repeatedly by vegetative cuttings in Katori, Chiba, Japan. The present invention has been found to retain its distinctive characteristics through successive asexual propagations.

The following are the most outstanding and distinguishing characteristics of this new cultivar when grown under normal horticultural practices in Katori, Chiba, Japan.

A) Abundant, small, yellowish-white flowers; B) Abundant branching with a great profusion of blooms; C) Vigorous, decumbent growth habit; D) Excellent tolerance to rain; and E) Whole plant remains in bloom for a considerable period of time.

This new petunia plant is illustrated by the accompanying photographs which show blooms and foliage of the plant in full color, the colors shown being as true as can be reasonably obtained by conventional photographic procedures. The photographs are of a 2-month-old plant grown in a greenhouse in Katori, Chiba, Japan.

FIG. 1 shows the overall plant habit, including blooms, buds and foliage.

FIG. 2 shows the mature flower.

The following detailed description sets forth the distinctive characteristics of ‘Keiwhihus’. The data which define these characteristics were collected from asexual reproductions carried out in Katori, Chiba, Japan. The plant history was taken on 2-month old plants which were planted as rooted cuttings in 12-cm pots in 2005 and grown in a greenhouse between 18° C. and 25° C. The plants were pinched once in September 2005. Observations were made when the plants were in full flower in October 2005. Color readings were taken under natural light in the greenhouse. Color references are primarily to the RHS Colour Chart of The Royal Horticultural Society of London (R.H.S.) (2001).

Classification:

Family. —Solanaceae. Botanical.—Petunia hybrida Vilm. Common name.—Petunia.

Parentage:

Female parent. —An unnamed proprietary white (RHS 155D) flowered petunia plant (unpatented). Male parent. —An unnamed proprietary white (RHS 155B) flowered petunia plant (unpatented).

Growth:

Form. —Annual. Habit. —Decumbent to trailing shape, freely branching, vigorous. Height ( measured from the top of the soil ).—8.0 cm. Diameter or area of spread. —30.0 cm. Propagation. —Terminal tips of cutting. Time to produce a finished flowering plant. —2 to 3 weeks, in late April to late October, for a 12-cm pot. Keeping quality. —210 days. Outdoor plant performance. —Use in hanging baskets and containers; ground cover; excellent tolerance to rain; normal tolerance to wind. Time to initiate and develop roots. —7 days at 20° C. to 25° C. Time to produce rooted cutting or liner ( young plant ).—21 days at 20° C. to 25° C. Root description. —Light brown, fibrous, fine; fleshy, freely-branching.

Branches:

Numbers of branches. —Many lateral branches. Length of lateral branches. —15.0 cm. Diameter of lateral branches. —0.2 cm.

Stems:

Description. —Round in cross-section. Aspect. —Lying flat and apex ascended. Color. —RHS 144B. Diameter. —0.2 cm. Stem length. —15.0 cm. Internode length. —2.5 cm. Anthocyanin. —Absent. Texture. —Pubescent.

Leaves:

Arrangement. —Alternate, single leaves, abundant. Apex. —Obtuse. Base. —Cuneate. Color ( mature leaves ).—Upper surface: RHS 137B. Lower surface: RHS 137C. Color ( immature leaves ).—Upper surface: RHS 137B. Lower surface: RHS 137C. Margin. —Entire. Size. —Length: 4.0 cm. Width: 2.0 cm. Shape. —Elliptical. Texture. —Viscid, pubescence on both sides. Venation type. —Reticulate. Petiole. —Not clearly distinct from the leaf blade.

Flower buds:

Color. —RHS 160C. Shape. —Cylindrical. Size. —Length: 1.5 cm. Diameter: 0.5 cm.

Inflorescence:

Blooming habit. —Continuous. Inflorescence type. —Single flower; self-cleaning. Arrangement. —Borne in upper leaf axils. Aspect. —Upright to outward. Shape. —Funnel-shape with five lobes; petals fused. Fragrance. —Faint. Flower number ( per inflorescence ).—One. Quantity of flowers and buds per plant. —Abundant. Flower longevity on plant. —4 days. Peduncle. —Color: RHS 144B. Length: 1.5 cm. Diameter: 0.1 cm. Texture: Pubescent, viscid.

Flowers:

Size. —Height (flower depth): 3.5 cm. Diameter: 4.5 cm. Corolla. —Shape: Tube. Color (outside): RHS 158D with RHS 151A venation. Petals. —Shape: Very broadly obtrullate. Size: Length (from the throat): 3.0 cm. Width: 1.5 cm. Apex: Cuspidate. Base: Fused. Margin: Entire, weakly undulated. Color (when opening). Upper surface: RHS 158D. Lower surface: RHS 158D. Color (fully opened): Upper surface: RHS 158D. Lower surface: RHS 158D. Throat color (inside): RHS 158D with RHS 151A venation. Petal texture: Upper surface: Satiny. Lower surface: Satiny. Calyx. —Form: Tubular, star-shaped. Length: 1.0 cm. Diameter: 2.0 cm. Sepals. —Number: 5. Shape: Narrowly oblong, bent over outwardly. Apex: Round. Base: Fused. Margin: Entire. Size: Length: 1.0 cm. Width: 0.3 cm. Color (mature): Upper surface: RHS 144B. Lower surface: RHS 144B. Color (immature): Upper surface: RHS 144B. Lower surface: RHS 144B.

Reproductive organs:

Stamens. —Quantity: 5. Anther: Shape: Ellipsoidal. Size: Length: 0.2 cm. Width: 0.1 cm. Color: RHS 13D. Pollen. —Amount: Normal. Color: RHS 13D. Pistil. —Quantity: One. Length: 1.5 cm. Style. —Length: 1.0 cm. Color: RHS 154D. Stigma. —Shape: Transversely elliptic. Color: RHS 144C. Ovary color: RHS 143C.

Fruit and seed set: A few seeds develop that are 0.05 cm in diameter and RHS 200A in color.

Disease and insect resistance: No particular resistance or susceptibility to diseases or insects noted to date.

‘Keiwhihus’ differs from the female parent, an unnamed proprietary petunia plant (unpatented), by having a decumbent plant habit, while the female parent has a spreading plant habit. Additionally, ‘Keiwhihus’ has a shorter plant height and a smaller flower diameter than the female parent.

‘Keiwhihus’ differs from the male parent, an unnamed proprietary petunia plant (unpatented), by having a taller plant height, a larger flower diameter, and a larger plant diameter, than the male parent.

‘Keiwhihus’ is similar to the commercial variety ‘Revolution White’ (U.S. Plant Pat. No. 8,768) however, there are differences as listed in Table 1 below: