Coleus plant named ‘UF15-6-28’

Abstract

UF15-6-28 is a new Coleus plant with novel characteristics that include excellent heat tolerance, distinct, lance-shaped leaves that display a unique and consistent crimson and chartreuse coloration pattern, and a vigorous, compact mounded growth habit with excellent lateral branching. UF15-6-28 exhibits superior foliage color stability when grown under all conditions, including both sun and shade conditions. Further, UF15-6-28 exhibits long-season performance until late fall.

Claims

1. A new and distinct Plectranthus scutellarioides plant called UF15-6-28 as shown and described herein.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) This new Coleus plant is illustrated by the accompanying photographs, which show the plant's form and foliage. The colors shown are as true as can be reasonably obtained by conventional photographic procedures. The photographs in FIGS. 2 and 3 are of plants that were grown from unrooted cuttings in a poly-covered plastic greenhouse in Gainesville, Fla. for 11 weeks from November, 2017 through February, 2018.

(2) FIG. 1Shows the pedigree of UF15-6-28.

(3) FIG. 2Shows the growth habit, form, and foliage of UF15-6-28.

(4) FIG. 3Shows a close-up of the foliage of UF15-6-28.

DETAILED BOTANICAL DESCRIPTION

(5) The following detailed description sets forth the distinctive characteristics of UF15-6-28. The detailed description was obtained using 10-week-old plants grown from unrooted cuttings during November, 2017 through February, 2018 in a poly-covered plastic greenhouse in Gainesville, Florida. The plants were propagated in mist for 10 days after cuttings were stuck, and then they were grown in 1-gallon pots for approximately 9 weeks. Color references are to The R.H.S. Colour Chart of The Royal Horticultural Society of London (R.H.S.), 2007 5th Edition. Classification: Family.Lamiaceae. Botanical.Plectranthus scutellarioides. Common name.Coleus. Cultivar name.UF15-6-28. Plant description: Form.Spreading. Habit.Mounded. Height (from top of soil).15-20 cm. Width (horizontal plant diameter).45-50 cm. Propagation: Type cuttings.Vegetative meristems having at least 1 node. Time to initiate roots.3-4 days. Time to produce a rooted cutting.7-10 days. Root habit.Fibrous. Root description.Callus forms in 2-3 days; roots initiate in 3-4 days; and roots become highly branched in 7-10 days. Branches: Quantity per plant.8. Branch color.Yellow green, RHS 145A. Texture.Smooth. Pubescence.Not present. Stem description.Square-shaped and 0.7 cm in diameter at the soil line. Branch diameter.0.4-0.5 cm at the base of a 16 cm long branch. Branch length.14-16 cm. Internode length.2.0-2.5 cm. Anthocyanin.Yellow green, RHS 145A. Leaves: Quantity of leaves per branch.16-20. Arrangement: Opposite. Fragrance.Not fragrant. Shape.Elliptic. Length.10-12 cm. Width.4-5 cm. Apex.Narrowly acute. Base.Attenuate. Margin.Lobed. Leaf texture (both surfaces).Smooth. Pubescence color (both surfaces).Not present. Venation color.Upper surface: Center=Purplish red, RHS N79A; Edges=Red, RHS 187B. Lower surface: Yellow green, RHS 145C. Venation pattern.Upper surface: Arcuate. Lower surface: Reticulate. Color.Immature leaf: Upper surface: Center=Red, RHS 187C; Margin=Yellow, RHS N144B. Lower surface: Center=Red, RHS 187B; Margin=Yellow green, RHS N150C. Color.Mature leaf: Upper surface: Center=Red, RHS 187B; Margin=Yellow green, RHS N144C. Lower surface: Center=Yellow green, RHS 146D; Margin=Yellow green, RHS N144C. Petiole length.4.0-4.5 cm. Petiole diameter.0.1-0.2 cm. Petiole color.Yellow green, RHS 145B. Petiole texture.Smooth, no pubescence. Flowers and seeds: Not observed. Fruit/seed set: Not observed. Disease and insect resistance: The disease and insect resistance of this cultivar is typical of its species. The most common insect pests observed on this plant in Gainesville, Fla. have been long-tailed or citrus mealybugs (Pseudococcus sp.), which occurred on older stock plant material that had been held in the greenhouse for over 3-4 months. Impatiens Necrotic Spot Virus (Bunyaviridae) has also been observed in plants that were confined in greenhouses with mixed crops (peppers) that were infected with Western flower thrips (Frankliniella occidentalis). The most common pathogen of this species in the U.S. is downy mildew (Perononspora lamii) and it has been observed in stock materials grown closely together during the cooler growing seasons.