Patent Publication Number: US-2003233689-P1

Title: Rose plant named &#39;Preratemp&#39;

Description:
BOTANICAL CLASSIFICATION/CULTIVAR DESIGNATION  
       [0001] Rosa hybrida  cultivar Preratemp  
       BACKGROUND OF THE INVENTION  
       [0002] The present invention relates to a new and distinct cultivar of Hybrid Tea Rose plant, botanically known as  Rosa hybrida,  and hereinafter referred to by the cultivar name Preratemp.  
       [0003] The new cultivar is a product of a planned breeding program conducted by the Inventor in Rijsenhout, The Netherlands. The objective of the breeding program was to develop new cut Rose cultivars with attractive flower colors, long and strong stems, dark green leaves, good production during the winter, and good postproduction longevity.  
       [0004] The new cultivar originated from a cross made by the Inventor in 1996 of two proprietary selections. The proprietary selection identified as code number 93-8, not patented, was the female, or seed, parent and the proprietary selection identified as code number 93-182, not patented, was the male, or pollen, parent. The cultivar Preratemp was discovered and selected by the Inventor as a flowering plant within the progeny of the stated cross in a controlled environment in Rijsenhout, The Netherlands.  
       [0005] Asexual reproduction of the new cultivar by cuttings taken at Rijsenhout, The Netherlands, has shown that the unique features of the new cultivar are stable and reproduced true to type in successive generations of asexual reproduction.  
       SUMMARY OF THE INVENTION  
       [0006] The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘Preratemp’. These characteristics in combination distinguish the new Hybrid Tea Rose as a new and distinct cultivar:  
       [0007] 1. Shiny dark green leaves.  
       [0008] 2. Long, strong and green flowering stems.  
       [0009] 3. Large red purple-colored flowers.  
       [0010] 4. Good postproduction longevity.  
       [0011] Compared to plants of the female parent, the selection 93-8, plants of the new Hybrid Tea Rose have longer flowering stems and differ in flower color as plants of the selection 93-8 have pink-colored flowers. Compared to plants of the male parent, the selection 93-182, plants of the new Hybrid Tea Rose have shorter flowering stems, are more freely flowering, and have longer postproduction longevity.  
       [0012] Compared to plants of the cultivar Prerarol, U.S. Plant patent application filed concurrently with this application, plants of the new Hybrid Tea Rose have longer flowering stems and differ in flower color as plants of the cultivar Prerarol have dark red-colored flowers.  
       [0013] Plants of the Hybrid Tea Rose can be compared to plants of the cultivar Pekcoujenny, not patented. In side-by-side comparisons conducted by the Inventor in Rijsenhout, The Netherlands, plants of the new Hybrid Tea Rose differed from plants of the cultivar Pekcoujenny in the following characteristics:  
       [0014] 1. Plants of the new Hybrid Tea Rose had longer flowering stems than plants of the cultivar Pekcoujenny.  
       [0015] 2. Plants of the new Hybrid Tea Rose were more freely flowering than plants of the cultivar Pekcoujenny.  
       [0016] 3. Flower color of plants of the new Hybrid Tea Rose and of plants of the cultivar Pekcoujenny differed as flower color of plants of the cultivar Pekcoujenny was dark red. 
     
    
    
     BRIEF DESCRIPTION OF PHOTOGRAPH  
     [0017] The accompanying colored photograph illustrates the new Hybrid Tea Rose plant, showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photograph may differ slightly from the color values cited in the detailed botanical description which more accurately describe the actual colors of the new Hybrid Tea Rose. The photograph comprises a side perspective view of typical flowers and leaves of the new Hybrid Tea Rose grown in Rijsenhout, The Netherlands. 
    
    
     DETAILED BOTANICAL DESCRIPTION  
     [0018] Plants of the new Hybrid Tea Rose have not been observed under all possible environmental conditions. The phenotype may vary significantly with variations in environment such as temperature and light without, however, any variance in genotype.  
     [0019] The aforementioned photographs, following observations and measurements describe plants grown in Rijsenhout, The Netherlands, in glass-covered greenhouses with average day temperatures of 18° C. and average night temperatures of 17° C. Cut flowering stems used for the photographs and the description were about seven weeks old. In the following description, color references are made to The Royal Horticultural Society Colour Chart except where general terms of ordinary dictionary significance are used.  
     [0020] Classification:  
     [0021] Botanical.—Rosa hybrida  cultivar Preratemp.  
     [0022] Commercial.— Hybrid Tea Rose used as a cut flower.  
     [0023] Parentage:  
     [0024] Female, or seed, parent.— Proprietary selection of  Rosa hybrida  identified as code number 93-8, not patented.  
     [0025] Male, or pollen, parent.— Proprietary selection of  Rosa hybrida  identified as code number 93-182, not patented.  
     [0026] Propagation:  
     [0027] Type.— By vegetative cuttings.  
     [0028] Time to initiate roots.— About 12 days at 25° C.  
     [0029] Time to develop roots.— About 25 days at 25° C.  
     [0030] Root description.— Fine, fibrous and well-branched.  
     [0031] Plant Description:  
     [0032] Form.— Upright; narrow; bushy.  
     [0033] Plant height.— About 110 cm.  
     [0034] Plant width.— About 40 cm.  
     [0035] Growth habit.— Moderately vigorous.  
     [0036] Flowering stems.— Quantity per plant: About 4 per plant. Length: About 90 cm. Diameter: About 1.25 cm. Internode length: About 6.5 cm. Texture: Glabrous; with thorns. Color: 137B. Thorns: Amount: Moderate. Height: About 8 mm. Diameter, at base: About 9 mm. Shape: Triangular. Color: Apex, 177A, fading to 197B towards the base.  
     [0037] Foliage description.— Arrangement: Alternate; compound with five to nine leaflets. Quantity per flowering stem: About 14 compound leaves. Leaf length: About 18 cm. Leaf width: About 13 cm. Terminal leaflet length: About 7.5 cm. Terminal leaflet width: About 5 cm. Leaflet shape: Ovate. Leaflet apex: Acute. Leaflet base: Obtuse. Leaflet margin: Serrate. Leaflet texture: Smooth, shiny. Leaflet venation pattern: Pinnate. Petiole length: To base of lower leaflet: About 4 cm. To base of terminal leaflet: About 11 cm. Petiole diameter: About 2 mm. Stipules: Two at either side of petiole base; less than 1 cm in length and about 1 mm in diameter; linear in shape. Color: Young foliage, upper and lower surfaces: 146A. Fully expanded foliage, upper surface: 139A. Fully expanded foliage, lower surface: 147B. Venation, upper surface: 139A. Venation, lower surface: 147D. Petiole and stipules: 137A.  
     [0038] Flower description:  
     [0039] Flower type and habit.— Large red purple-colored flowers. Consistently symmetrical rosette flowers. Freely and recurrent flowering habit. Flowers arranged singly at terminal apices or in sprays of 2 to 4 flowers and flower buds per spray. Flowers persistent.  
     [0040] Flowering season/time to flower.— Year-round under greenhouse conditions. Depending on environmental conditions and season, time to flower is about seven weeks.  
     [0041] Flower diameter.— About 10.5 cm.  
     [0042] Flower depth  ( height ).—About 5 cm.  
     [0043] Flower longevity on plant.— About 18 days.  
     [0044] Flower longevity as a cut flower.— About 10 days.  
     [0045] Fragrance.— Not detected.  
     [0046] Flower buds  ( at stage of showing color ).—Shape: Ovoid. Length: About 5 cm. Diameter: About 3.8 cm. Color: 53A.  
     [0047] Petals.— Quantity: About 35 per flower arranged in about 6 or 7 whorls. Length: About 5 cm. Width: About 5.5 cm. Shape: Orbicular. Apex: Mucronate. Margin: Entire, undulate, reflexed. Texture: Smooth, satiny. Color: When opening, upper surface: 53A. When opening, lower surface: 60A. Fully opened, upper surface: 59A; color fading slightly to 185A with subsequent development. Fully opened, lower surface: 53A.  
     [0048] Sepals.— Quantity per flower: Five. Calyx length: About 4.7 cm. Calyx diameter: About 4.2 cm. Shape: Elongated, linear. Apex: Aristate. Margin: Mostly entire with numerous random linear extensions, usually less than 1 cm in length. Texture: Smooth. Color: Upper surface: 146D. Lower surface: 144A.  
     [0049] Peduncles.— Strength: Strong. Aspect: Erect. Length: About 10 cm.  
     [0050] Reproductive organs.— Stamens: Quantity per flower: About 98. Anther length: About 3.1 mm. Anther shape: Ovate. Anther color: 15A. Pollen amount: Moderate. Pollen color: 10C. Pistils: Quantity per flower: About 90. Style length: About 1.2 cm. Style color: 155B overlain with 181A. Stigma color: 12B. Ovary color: 155D.  
     [0051] Seed.— Length: About 6.9 mm. Diameter: About 4.7 mm. Shape: Oval. Color: 159A.  
     [0052] Disease/Pest resistance: Plants of the new Hybrid Tea Rose have not been observed to be resistant to pathogens and pests common to roses.