Abstract:
A  Chrysanthemum  plant named ‘Redock White’ characterized by its medium sized single type blooms with white ray-florets and yellow-green disc florets.

Description:
RELATED CULTIVARS 
   ‘Redock White’ is related to ‘Redock Yellow’ (copending U.S. Plant Pat. application), ‘Redock Dark’ (U.S. Plant Pat. pending), ‘Redock Salmon’ (U.S. Plant Pat. pending), and ‘Redock Orange’ (U.S. Plant Pat. pending). These varieties are all mutants of the original ‘Redock’ (unpatented). 
   BACKGROUND OF THE INVENTION 
   ‘Redock White’ is a product of a breeding and selection program which had the objective of finding color mutants of ‘Redock’. The new plant of the present invention comprises a new and distinct cultivar of  chrysanthemum  plant that is a natural occurring sport of a parent  chrysanthemum  named ‘Redock’ (unpatented). A comparison with Parent  chrysanthemum  ‘Redock’ is also made in this application. The new cultivar was discovered as a whole plant mutation in 2001 by Mark Roland Boeder in a controlled environment (greenhouse) in Rijsenhout Holland. The first act of asexual reproduction of ‘Redock White’ was accomplished when vegetative cuttings were taken from the initial selection in 2001 in Rijsenhout Holland. 
   SUMMARY OF THE INVENTION 
   The present invention is a new and distinct variety of  chrysanthemum  bearing medium sized blooms with white ray-florets and yellow-green disc florets. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The present invention of a new and distinct variety of  chrysanthemum  is shown in the accompanying drawings, the color being as nearly true as possible with color photographs of this type. 
       FIG. 1  shows a plant of the cultivar in full bloom. 
       FIG. 2  shows the bloom of the cultivar in various stages. 
       FIG. 3  shows the foliage of the cultivar. 
   

   DESCRIPTION OF THE INVENTION 
   This new variety of  chrysanthemum  is of the botanical classification  Chrysanthemum morifolium  L. The observations and measurements were gathered from plants grown in April/May in a greenhouse in Rijsenhout Holland in a photo-periodic controlled crop under conditions generally used in commercial practice. The greenhouse temperatures during this crop were at day-time between 18° C. and 25° C. and at night 20° C. After a long day period of 14 days the photo-periodic response time in this crop was 47 days. After the long day period to flowering growth retardants were applied 3 times in an average dose of 2.5 gram/liter water. No tests were done on disease or insect resistance or susceptibility. This new variety produces medium sized blooms with white ray-florets and yellow-green disc-florets blooming on the plant for 4 weeks. This new variety of  chrysanthemum  has been found to retain its distinctive characteristics throughout successive propagations however the phenotype may vary significantly with variations in environment such as light intensity and temperature. To show the phenotype as described ‘Redock White’ can be planted without assimilation lightning (high pressure sodium lamps) between week 1 and week 52 under greenhouse conditions in Holland. With assimilation light (minimum level 2500 lux) it can be planted year round under greenhouse conditions in Holland. 
   The difference between ‘Redock’ and its sport ‘Redock White’ is flower color. From the cultivars known to inventor the most similar existing cultivars in comparison to ‘Redock White’ are the original ‘Redock’ and its several sports and ‘White Reagan’ (U.S. Plant Pat. No. 8,784). When ‘Redock White’ is being compared with ‘Redock’, the following differences and similarities are noticed: The difference of ‘Redock White’, and ‘Redock’ is the (1) ray-floret color. The color of ‘Redock White’ is white, that of ‘Redock’ is pink. All other characteristics of members of the ‘Redock’ family are similar. While when ‘Redock White’ is being compared with ‘Reagan White’, the following differences and similarities are noticed. (1) ray-floret color. Both ‘Redock White’ and ‘White Reagan’ have white florets. (2) height of bloom. The bloom height of ‘Redock White’ is high, while that of ‘White Reagan’ is low. (3) cross-section of ray-florets. This is strongly concave for ‘Redock White’, while it is flat for ‘White Reagan’. (4) vigour. The plants of ‘Redock White’ are more vigorous than those of ‘White Reagan’. (5) plant height. The plants of ‘Redock White’ are higher than ‘White Reagan’. 
   The following is a description of the plant and characteristics that distinguish ‘Redock White’ as a new and distinct variety. The color designations are taken from the plant itself. Accordingly, any discrepancies between the color designations and the colors depicted in the photographs are due to photographic tolerances. The color chart used in this description is: The Royal Horticultural Society Colour Chart, edition 1995. 
   
     
       
             
           
             
             
           
         
             
               TABLE 1 
             
             
                 
             
             
               Botanical Description of 
             
             
               CULTIVAR ‘Redock White’ 
             
             
                 
             
           
           
             
                 
             
           
        
         
             
               Bud 
                 
             
             
               Size 
               Small, cross-section 0.7 cm 
             
             
                 
               height 0.9 cm 
             
             
               Outside Color 
               White 155A 
             
             
               Involucral bracts 
               3 rows, length 8 mm, width 3 mm 
             
             
               Involucral bracts among disc-florets 
               Not present 
             
             
               Involucral bracts color 
               Green 147B 
             
             
               Bloom 
             
             
               Type 
               Single 
             
             
               Height 
               High 
             
             
               Size 
               Medium 
             
             
               Fully Expanded 
               7.0 cm 
             
             
               Number of blooms per single stem 
               Average of 15-20 
             
             
               Seeds 
               Not produced 
             
             
               Performance (blooming period) 
               4 weeks 
             
             
               Fragrance 
               Typical  chrysanthemum   
             
             
               Color 
             
             
               Center of the flower (disc-florets) 
               Immature yellow-green 144A 
             
             
                 
               Mature yellow-green 151C 
             
             
               Color of upper surface of the 
               White 155D 
             
             
               majority of the ray-florets 
             
             
               Color of the lower surface of the 
               White 155D 
             
             
               majority of the ray-florets 
             
             
               Tonality from Distance 
               A spray mum with white flowers 
             
             
                 
               and a yellow-green disc 
             
             
               Color of the upper surface of the 
               White 155D 
             
             
               ray-florets after aging of the plant 
             
             
               Ray florets 
             
             
               Texture 
               Upper and under side smooth 
             
             
               Number 
               26-28 
             
             
               Cross-section 
               Strongly concave 
             
             
               Longitudinal axis of majority 
               Reflexing 
             
             
               Length of corolla tube 
               Short 
             
             
               Ray-floret length 
               3.3 cm 
             
             
               Ray-floret width 
               1.0 cm 
             
             
               Ratio length/width 
               Medium 
             
             
               Shape of tip 
               Pointed, very occasionally round 
             
             
               Disc florets 
             
             
               Disc diameter 
               0.8-1.0 cm 
             
             
               Distribution of disc florets 
               Numerous, clearly visible at all 
             
             
                 
               stages of flowering 
             
             
               Shape 
               Tubular 
             
             
               Color 
               Yellow-green 144A 
             
             
               Receptacle shape 
               Conical raised 
             
             
               Reproductive Organs 
             
             
               Stamen (present in disc florets only) 
               Thin 3 mm in length 
             
             
               Stamen color 
               Yellow-green 144B 
             
             
               Pollen 
               No pollen present 
             
             
               Pollen color 
               Not applicable 
             
             
               Styles (present in both ray and disc 
               Thin 
             
             
               florets) 
             
             
               Style color 
               Yellow-green 144B 
             
             
               Style Length 
               4 mm 
             
             
               Stigma color 
               Yellow-green 144B 
             
             
               Stigma Width 
               2 mm 
             
             
               Ovaries 
               Enclosed in perianth 
             
             
               Plant 
             
             
               Form 
               A spray mum meant for erect 
             
             
                 
               culture 
             
             
               Growth habit 
               Upright 
             
             
               Growth rate 
               Very vigorous 
             
             
               Height 
               125-135 cm 
             
             
               Internodes 
               2.5-3.0 cm 
             
             
               Spray formation 
               Corymbiform 
             
             
               Stem Color 
               Yellow-green 147B 
             
             
               Stem Strength 
               Medium 
             
             
               Stem Brittleness 
               Present 
             
             
               Stem Anthocyanin Coloration 
               Absent 
             
             
               Peduncle length 
               Near the top 16 cm, near the mid- 
             
             
                 
               dle 23 cm, near the bottom 28 cm 
             
             
               Peduncle color 
               Green 147B 
             
             
               Peduncle, attachment 
               Brittle 
             
             
               Peduncle, angle with stem 
               Small, 30° C. 
             
             
               Flowering Response (photo-periodic 
               47 days 
             
             
               controlled crop, not natural season) 
             
             
               Foliage 
             
             
               Color 
               Upper side yellow-green 147A 
             
             
                 
               Under side green 138B 
             
             
               Size 
               large; length 12.0-14.0 cm, 
             
             
                 
               width 7.0-8.0 cm 
             
             
               Quantity (number per single stem) 
               30-34 
             
             
               Shape 
               Ovate and deeply lobed 
             
             
               Texture upper side 
               Fleshy and glabrous 
             
             
               Texture under side 
               Pubescent 
             
             
               Ribs and veins upper side 
               Ribs and veins well developed 
             
             
               Ribs and veins under side 
               Ribs and veins well developed 
             
             
               Venation arrangement 
               Palmate 
             
             
               Shape of the margin 
               Lobed 
             
             
               Shape of Base of Sinus Between 
               Round 
             
             
               Lateral Lobes 
             
             
               Margin of Sinus Between Lateral 
               Converging 
             
             
               Lobes 
             
             
               Shape of Base 
               Rounded 
             
             
               Apex 
               Mucronate 
             
             
               Petiole length 
               2.5 cm 
             
             
               Petiole diameter 
               4-5 mm 
             
             
               Petiole color 
               Green 147B 
             
             
                 
             
           
        
       
     
   
   
     
       
             
           
             
             
             
             
           
             
             
             
             
           
         
             
               TABLE 2 
             
           
           
             
                 
             
             
               Differences with the comparison Varieties 
             
           
        
         
             
                 
               ‘Redock White’ 
               ‘Redock’ 
               ‘White Reagan’ 
             
             
                 
                 
             
           
        
         
             
               Ray-floret color 
               White 155D 
               Purple 75C 
               White 155D 
             
             
               Bloom height 
               High 
               High 
               Low 
             
             
               Cross-section of 
               Strongly concave 
               Strongly concave 
               Flat 
             
             
               ray-floret 
             
             
               Vigour 
               Very vigorous 
               Very vigorous 
               Vigorous 
             
             
               Plant height 
               125-135 cm 
               125-135 cm 
               100-125 cm