Rose plant named ‘ALTsantared’

Abstract

A new and distinct cultivar of Rosa plant named ‘ALTsantared’ is disclosed, characterized by distinctive fully double dark red flowers with a tea rose fragrance. Plants are vigorous and can be grown on their own roots. Plants bloom early, flower continuously, and exhibit good resistance to blacks pot (Diplocarpon rosae) and powdery mildew (Podosphaera pannosa) diseases. The new variety is a Rosa, normally produced as an outdoor garden or container plant.

Claims

1. A new and distinct cultivar of Rosa plant named ‘ALTsantared’ as herein illustrated and described.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPH

(1) The accompanying photograph illustrates in full color a close up of an individual flower from a plant of about 18 months old. The photograph was taken using conventional techniques and although colors may appear different from actual colors due to light reflectance it is as accurate as possible by conventional photographic techniques

DETAILED BOTANICAL DESCRIPTION

(2) In the following description, color references are made to The Royal Horticultural Society Colour Chart 2007 except where general terms of ordinary dictionary significance are used. The following observations and measurements describe ‘ALTsantared’ plants grown outdoors, in Palm Desert, Calif. The growing temperature ranged from approximately 10° C. to 38° C. during the day and from approximately 5° C. to 22° C. during the night. Measurements were taken in September. General light conditions were very bright, normal sunlight. Measurements and numerical values represent averages of typical plant types. Botanical classification: Rosa ‘ALTsantared’. Market classification: Floribunda shrub rose.

PROPAGATION

(3) Time to initiate roots: About 15 days at approximately 20° C. Time to produce a rooted cutting: About 35 days at approximately 20° C.

PLANT

(4) Age of plant described: Approximately 1.5 years. Growth habit: Compact. Container size: 2 gallon. Height: 45 cm. Plant spread: 55 cm. Rootstock: Own root. Growth rate: Moderate. Branching characteristics: Sympodial branching. Length of primary lateral branches: Average range 12 to 24 cm. Diameter of lateral branches: Approximately 6 mm to 9 mm. Quantity branches: 5 to 7 main branches, moderate lateral branches, 8 to 12 lateral branches per main branch. Branches-young wood: Diameter.—Approximately 4 mm. Texture.—Glabrous, very dense soft, short thorns. As branch matures thorns become less dense and sharp. Color.—Near RHS Green 143C. Branches-old wood: Diameter.—Approximately 5 to 8 mm. Color.—Near RHS Green 137B. Texture.—Glabrous. Thorns: Approximately density/quantity of thorns.—Young growth: Sparse, soft prickles. Occasional fully formed thorn colored near RHS Greyed-Red 181A about 3 to 4 mm long. Mature growth: Sparsely thorns about 3 mm at base, 3 mm long. Colored near RHS Grey-Orange N167C. Straight, not hooked.

FOLIAGE

(5) Leaf: Arrangement.—Alternate and compound. Quantity.—Average 6 to 10 per main branch. Internode.—Average range 3 cm to 5 cm. Average length.—Approximately 9 to 12 cm. Average width.—Approximately 7 cm. Rachis: Average length.—Approximately 4.0 cm to 5.0 cm. Average diameter.—Approximately 2 mm. Color.—Upper surface: Near RHS Green 137C. Lower surface: Near RHS Yellow-Green 144B. Texture.—Glabrous, all surfaces. Leaflet: Quantity.—5 or 7 per leaf, most commonly 5. Average length.—Approximately 3.5 cm to 4 cm. Average width.—Approximately 3.0 cm to 3.8 cm. Shape of blade.—Broad ovate. Apex.—Acute. Base.—Broadly rounded. Margin.—Finely serrate. Serrations minute. Appearance of top surface.—Strong glossy. Appearance of bottom surface.—Matte. Texture of top surface.—Glabrous. Texture of bottom surface.—Glabrous. Color.—Young foliage upper side: Near RHS Green 137B overall lightly flushed Greyed-Purple 187B. Margin 187A. Young foliage under side: Near RHS Green 137C overall lightly flushed Greyed-Purple 187B. Margin 187A. Mature foliage upper side: Near RHS Green 139A. Mature foliage under side: Near RHS Green 137A. Venation.—Type: Reticulate. Venation color upper side: Near RHS Yellow-Green 144A, flushed Greyed-Purple 187B when immature. Venation color under side: Near RHS Green 143B. Petiole: Average length.—Approximately 1.8 cm to 2.5 cm. Average diameter.—Approximately 3 mm. Color.—Upper surface: Near RHS Yellow-Green 144C. Based flushed with anthocyanin near 187D. Lower surface: Near RHS Green 143C. Petiole wing.—Typically 15 mm long and 5 mm wide. Apex apiculate. Upper surface colored near RHS Green 143A, lower surface colored near Green 137D. Texture.—Glabrous.

FLOWER

(6) Natural flowering season: Spring until Autumn. Inflorescence type and habit: Singly occurring fully double rotate flowers. Rate of flower opening: Approximately 7 days from bud to fully opened flower. Flower longevity on plant: 10 to 14 days, after fully opened. Quantity of flowers: About 10 to 15 fully opened flowers and buds. Flower shape: From above.—Round to very slightly irregular round. Profile of upper part of flower.—Flattened convex. Profile of lower part of flower.—Flattened convex. Flower size: Diameter.—Approximately 8 cm. Height.—Approximately 5.8 cm. Peduncle: Length.—3.5 cm to 5.0 cm. Diameter.—3 mm. Color.—Near RHS Green 143C flushed Red 53A near flower attachment. Texture.—Very softly prickly. Petals: Petal arrangement.—Multiple rotate, overlapping whorls. Petal quantity.—Average 60 to 70. Length.—3.5 cm. Width.—3.5 cm. Shape.—Orbicular. Margin.—Entire. Curled downward. Apex.—Rounded. Base.—Very broad attenuate. Texture.—Glabrous, all surfaces. Color.—When opening: Upper surface: Near RHS Red 46A. Very small basal blotch near White N155C. Lower surface: Near RHS Red 53B. Very small basal blotch near White N155C. Fully opened: Upper surface: Near RHS Red 45A flushed 53A. Very small basal blotch near White N155C. Lower surface: Near RHS Red 53B. Very small basal blotch near White N155C. Bud: Shape.—Ovate. Length.—Approximately 3.0 cm. Diameter.—Approximately 2.2 cm. Color.—Near RHS Red 46A. Sepals: Quantity.—5. Length.—2.5 cm. Width.—9 mm. Shape.—Deltoid. Apex.—Apiculate. No sepal extensions. Margin.—Entire. Texture.—Densely pubescent upper surface, slightly pubescent lower surface. Color.—Interior Surface: Near RHS Green 138B flushed Red 53A. Exterior Surface: Near RHS Green 138A flushed Red 53A. Receptacle: Length.—14 mm. Width.—16 mm. Shape.—Flat. Color.—Near RHS Yellow-Green 145D. Fragrance: Moderate tea rose scent.

REPRODUCTIVE ORGANS

(7) Stamens: Quantity.—About 100. Filament length.—Approximately 4 mm to 9 mm. Filament color.—Near RHS Yellow-Orange 21B. Anthers: Length.—2 mm. Shape.—Bi-lobed. Color.—Near RHS Yellow-Orange 21A. Pollen.—Color: Near RHS Yellow-Orange 18D. Quantity: Scant or none. Pistil: Not observed.

OTHER CHARACTERISTICS

(8) Seeds and fruits: Not observed. Disease/pest resistance: Good overall resistance to normal pests typical of garden roses. Very good resistance to blackspot (Diplocarpon rosae). Very good resistance to powdery mildew (Podosphaera pannosa). In a three-year confidential field trial of floribunda shrub roses the new variety ‘ALTsantared’ remains free of powdery mildew year-round while varieties planted nearby showed symptoms of powdery mildew.