Abstract:
A rose plant exhibiting good resistance to powdery mildew, and being characterized by nonfragrant flowers, very high crop, good self-rooting and high stem break forth.

Description:
This application is a continuation application of application Ser. No. 07/387,837, filed Aug. 1, 1989, now abandoned. 
    
    
     FIELD OF THE INVENTION 
     The present invention is concerned with a new variety of hybrid tea rose discovered by me and being a mutation of Deladel (U.S. Plant. Pat. No. 4,391, dated Mar. 6, 1979), Madame G. Delbard variety. 
     SUMMARY OF THE INVENTION 
     The mutation was first discovered on a cultivated area, in a farm located in South America, at an altitude of about 2,400-2,500 meters above sea level, with average night temperature of 5-8 degrees centigrade, and day temperature of 5-18 degrees centigrade. 
     Plants were grown in a green-house, and then brought to Israel, where they were vegetatively propagated by selfrooting of cuttings. 
     Asexual reproduction of this new cultivar as performed at Yuval Agriculture Products at Moshav Ha&#39;Yogev shows that the foregoing characteristics and distinctions came true to form and are established and transmitted through succeeding propagations. 
     The resulting plants were found to be stable in their botanical characteristics, as are described below and in the attached drawing. 
     The following is a description of the characteristics of my new rose cultivar which distinguish it from cultivars of which I am aware and especially from Madame G. Delbard (Deladel): 
     1. Better branching. 
     2. Larger flower bud. 
     3. Distinct larger number of petals. 
     4. Larger sepals with larger extensions. 
     5. More water shoots, than the original plant. 
     6. Good grafting compatibility on Rosa indica L. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     The first sheet of the drawing depicts buds of the claimed plant in various stages of opening; the characteristic shape and foliaceous appendages of the sepals are shown along with the high-centered character of the buds themselves. The coloration of the other surfaces of the petals at this stage of opening is also depicted. 
     The second sheet of drawing shows, in comparison, two petals of Carola, designated as A at the top of the drawing, and petals of comparable stage of maturity as taken from the parent variety &#34;Deladel&#34;, labelled B, at the bottom of the drawing. This sheet of drawing also depicts the typical difference in size of the petals taken from the mutation as compared to the parent variety; and, also shows the difference in the size of the spot at the point of petal attachment; that of the parent &#34;Deladel&#34; being much smaller in the comparison; and the difference in coloration; that of the sport being clear white while that of the parent being light yellow in color. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The following is a detailed description of my new rose cultivar with color in terminology in accordance with Royal Horticultural Society of London, England (R.H.S.) Colour Chart except where ordinary dictionary significance of color is indicated. 
     The plant originated from a mutation of Madame G. Delbard. 
     The following description is based on observations made in Moshav Ha&#39;Yogev, Israel, in a greenhouse: 
     
         ______________________________________Plant      growth habit   uprightOlder stem                corky.sup.1Young shoot      anthocyanin    strong      coloration      hue of anthocyanin                     purple      colorationPrickles                  presentPrickle    shape of upper straight      sides      shape of lower side                     concaveShort prickles      number         fewLong prickles      number         fewLeaf       size           length 140-170 mm                     width 110-150 mm      green color    medium to dark      glossiness of upper                     absent or very weak      sideLeaflet    cross section  slightly convex      undulation of  absent or very weak      marginTerminal leaflet      length of blade                     ca. 60 mm      maximum width  ca. 35 mm      length of petiole                     ca. 20 mm      shape of base  roundedFlowering shoot      number of flowers                     fewFlowering habit           continuousFlower pedicel      number of hairs or                     few      pricklesFlower bud longitudinal   circular to ovoid      sectionFlower     type           double      number of petals                     33-40      diameter       ca. 110 mm      view from above                     rounded to star-                     shaped      side view of upper                     flattened-convex      part      side view of lower                     flat      part      fragrance      noneSepal      length         40-55 mm      extensions     strongPetal      size           length 50-60 mm                     width 55-65 mm      shape          rounded      color of middle                     RHS 53-A dark red      zone of inner side      (according to the      Royal Horticultural      Society Color      Chart)      color of marginal                     RHS 53-A dark red      zone of inner side      spot at base of                     present      inner side      size of spot at                     medium (length of      base of inner side                     spot on the upper                     side of the petal                     was 8-10 mm      color of spot at                     white (RHS 155-D)      base of inner side      color of middle                     RHS 53-C dark red      zone of outer side      color of marginal                     RHS 53-C dark red      zone of outer side      spot of base of                     present      outer side      size of spot at                     very small to small      base of outer side      color of spot at                     white      base of outer side      reflexing of margin                     strong      undulation of  weak      marginStamen     predominant color                     purple      of filament      length         long      predominant color                     purple      hairiness of upper                     medium      half      position as    above      compared with      anthers      size           medium      shape of       pitcher shaped      longitudinal      section______________________________________ .sup.1 Typical for hybrid tea roses. 
    
     The time of beginning of flowering is early. 
     The average number of petals per flower: 33-38. 
     The bud size at time of picking is 5-6 cm long, and 3 cm in diameter. 
     The number of side shoots per flowering branch is 5-6. 
     The annual produce is 150-160 flowers per square meter. 
     Flowering stem medium green, 70-80 cm long with an average of 13 leaves. 
     The vase life is up to 15 days, under condition of room temperature. 
     Average number of water shoots, in 1st year after planting 4-6. 
     Prickles, per internode -- 2-3. 
     Prickles up to 3rd leaf -- 1. 
     Number of leaflets per leaf -- 5-7. 
     Budding sprout -- 8-9. 
     Fragrance -- none. 
     Plant&#39;s height in 8 months after planting 170-180 cm. 
     Time from planting to commercial flower production 6-8 months. 
     Good resistance to Rose Powdery Mildew. 
     Exhibits high stem break forth, very high crop and good self-rooting. 
     Under condition of room temperature flower opening proceeds 
     Under condition of room temperature flower opening proceeds slowly. 
     The variety should be grown under glass. 
     Comparison Of Production Characteristics Between The New Variety &#34;Carola&#34; and Variety &#34;Deladel&#34; 
     Observations made in Ecuador from commercial plantings during 1988-1990, where the two varieties were grown side by side, under the same conditions and same age, were both self-rooted and with the same planting time. Each one 10,000 square meters of plants. 
     
         ______________________________________           Carola   Deladel______________________________________Average number of petals             33-38      18-25Average number of cut flowers             1.85-2.00  0.90-1.25per plant per month (yearround production)Average number of water-             4-6        2-3shoots in first year afterplantingPlant height in 8 months             170-180 cm 80-90 cmafter plantingSize of spot at base of inner             medium     very smallsideColor of spot at base of             white      yellowinner side of petal             (RHS 155-D)Fragrance of flower             none       slight, not                        sweet or spicyTime from planting to             6-8 months 10-12 monthscommercial flower productionGrafting compatibility on             very good  very poorRosa indicia L.   (about 65%             success)______________________________________ 
    
     The size of the spot was, for the variety `Carola` defined 
     as: size of spot at base of inner side of petal-medium, and size of spot at base of outer side of petal-very small to small, using the sketch of the Test Guidelines for Rose of the Union for Protection of New Plant Varieties (document TG/11/4)-applying the following calculation: 
     
         [1+{(average length of spot/average length of petal)-1}]/(35-1)*8 
    
     With lower value of length of spot 1 mm, and higher value of length of spot 35 mm. 
     Statistical Analysis For Additional Observations Made In Ecuador In Order To Compare Carola With Deladel 
     
         ______________________________________            Carola                  Deladel______________________________________Number of petals:standard deviation 7.77    3.92mean               32.05   22.35Plant height in 8 months:standard deviation 0.13    0.10mean               1.97    1.50Basal shoots:standard deviation 1.48    0.67mean               3.00    1.32Flowers per plant:standard deviation 0.53    0.48mean               1.76    1.17______________________________________ 
    
     In all tests of the examined characteristics, the conclusion was that the population differ with a high level of significance. 
     Comparison Of Production Characteristics Between The New Variety Odem And Variety Carola 
     The new variety Odem is a variety that was subsequently discovered and is a spot of Carola. They differ as described below: 
     
         ______________________________________           Odem      Carola______________________________________Average number of petals             39-48       33-38Size of petallength            37-45 mm    50-60 mmwidth             39-49 mm    55-60 mmFlowerdiameter          ca. 80 mm   ca. 100 mmcolor of upper side             RHS 46-AB   RHS 53-APetal&#39;s reflexing medium      strongSize of spot at base of inner             small       mediumside of petalColor of spot at base of inner             yellow      whitesideLength of flowering stem             50-70 cm    70-90 cmThickness of flowering stem             medium      thickNumber of flowering stems per             about doubleplant per year    as for             Carola______________________________________