Abstract:
A new and distinct cultivar of Chrysanthemum plant named `Vyron`, bearing medium sized yellow blooms with a brownish center and a performance of about 14 days.

Description:
BACKGROUND OF THE INVENTION 
     The present invention comprises a new and distinct cultivar of Chrysanthemum plant which is a natural occurring sport of a parent Chrysanthemum named Regoltime (not patented). The new cultivar was discovered as a whole plant mutation in 1986 in a greenhouse at &#39;s-Gravenzande in Holland. The invention has been asexually reproduced by cuttings at the same location. The new cultivar has been found to retain all of its distinctive characteristics through successive asexual propagations. 
     SUMMARY OF THE INVENTION 
     The present invention is a new and distinct variety of Chrysanthemum of a medium sized yellow bloom with a brownish center. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The present invention of a new and distinct variety of chrystanthemum is shown in the accompanying drawings, the color being as nearly true as possible with color photographs of this type. In this regard, the ray florets illustrated in FIG. 2 appear slightly darker and more orange than true. 
     FIG. 1 shows a stem of the cultivar in full bloom. 
     FIG. 2 shows the various stages of bloom of the new cultivar. 
     FIG. 3 shows foliage and petiole of the new cultivar. 
    
    
     DESCRIPTION OF THE INVENTION 
     This new variety of Chrysanthemum is of the botanical classification Dendranthema grandiflora. When grown in the vicinity of &#39;s-Gravenzande, Holland, it has a response time of approximately 9 weeks. This new variety produces medium sized yellow blooms with a brownish center having a 2 week performance (i.e., vase life of 14 days). This new variety of chrysanthemum has been found to retain its distinctive characteristics throughout successive propagations and may be planted under greenhouse conditions in Holland between weeks 2 and 32. 
     The following is a description of the plant and characteristics (color designations are from R.H.S. Colour Chart) that distinguish it from related known varieties and antecedents: 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. 
     
         ______________________________________CULTIVAR VYRON       PARENT CULTIVAR REGOLTIME______________________________________ColorCenter of    Immature:   Immature:Flower/  brown 200 B yellow-green 144ADisc Floret    merging     Mature:    to yellow-orange                yellow-green 144C    at the edge    Mature:    greyed-orange    172A, deepening    to the centerColour of the    Nearest     Nearest Yellow 9Auppersurface of    Yellow 9Athe majority ofthe ray-floretsColour of the    Nearest     Between Yellow 6C and Yellow 7Clowersurface of    Yellow 9Bthe majority ofthe ray-floretsTonality from    A yellow daisy                A yellow daisy with a green centerDistance with a brown                showing no pollen    centerDiscoloration    none        to Yellow 8APollen   none        nonePetalsTexture  Upperside   Upperside smooth, underside smooth.    smooth, underside    smooth.Number   55-65, three rows                45-50, two rowsCross-section    concave, one keel                convex, two keelsArrangement    Imbricated  ImbricatedPersistence    Very good,  Very good, petals keep straight total    petals keep vaselife.    straight total    vaselife.Fragrance    Typical     Typical chrysanthemum    chrysanthemumDisc     medium      medium (±1.5 cm)Diameter (±1.7 cm)ReproductiveOrgansStamen   Yellow-green,                Yellow-green, thick, ±5 mm    thick, ±5 mm in                in length.    length.Pollen   none        noneStyles   green, thick                green, thickSytle Length    ±5 mm    ±5 mmStigmas  yellow-green                yellow-greenSigma    ±2 mm    ±2 mmWidthOvaries  enclosed in enclosed in calyx    calyxPlantForm     Spray mum meant                Spray mum meant for erect culture.    for erect culture.                Herbaceous.    Herbaceous.Growth   short to medium                shortHeight   ±100 cm  ±100 cmStem Color    near green  yellow-green 146C    137 AStem     strong to   strongStrength very strongStem     present     absentBrittlenessStem     present     absentAnthocyaninColorationInternodes    short, 2 cm very short to short, 11/2-2 cmFlowering    9 weeks     10 weeksResponseFoliageColor    upperside   upperside green 137 A, underside    between 137 A                green 137 C    and yellow-green    147 A, underside    near green 137 CSize     length ±11 cm,                length ±12 cm, width ±8 cm    width ±7 cmQuantity 26-30       28-32Shape    lobed, see  lobed    photographTexture  upperside fleshy,                upperside fleshy, underside smooth,    underside smooth,                slightly hirsute    slightly hirsuteRibs and Ribs well   Ribs well developed, veins not soVeins    developed,  developed    veins not so    developedEdge     crenated    crenatedShape of round       roundBase ofSinus BetweenLateral LobesMargin of    converging  convergingSinus BetweenLateral LobesShape of Base    truncate    cordateApex     mucronate   cuspidateGrowthDifference in    0           0average lengthResponse timeDifference in    0           0days of averageresponseYear of  1986        1980DiscoveryA botanical description of Vyron and its parent Regoltime:BudSize     large cross large cross section ±1.5 cm    section 1.5 cm                height ±1.2 cm    height ±1.2 cmForm     round and flat                round and flatOutside Color    near yellow-                near yellow 7C    orange 15BBloomSize     medium      smallFully Expanded    5-51/2 cm   41/2-5 cmBorne    Upper portion                Upper portion single flower per    single flower per                peduncle, lower portion plural flower    peduncle, lower                per peduncle.    portion plural    flower per    peduncle.Number of    average 8   average 8Blooms perStem per SprayPeduncle Near the top                Near the top ±6 cmLengths  ±6 cm    Near the middle ±12 cm    Near the middle                Near the bottom ±16 cm    ±12 cm    Near the bottom    ±16 cmPeduncle medium      mediumLateral Shoot,AttachmentPeduncle medium      smallLateral Shoot,AngleForm     single (daisy)                single (daisy)Performance    reasonable, reasonable, 14 days    14 days     (18-20° C.)    (18-20° C.)______________________________________