Rose Kordes Jubilee

A romantically rounded flowers filled with numerous yellow petals with vibrant pink edges, seamlessly combining characteristics of both Old Roses and modern varieties. Has lovely, sweet and fruity aroma with reminiscence of apricot. Has very vigorous and strong growth habit, forms very attractive and well balanced plant with very healthy dark green, glossy foliage.

DESCRIPTION OF THE VARIETY
The following is a description of rose ‘Kordes Jubilee’, using colour references of The Royal Horticultural Society (London, The UK) Colour Chart, 2001 except where common terms of color are used.

FLOWER
Blooms abundantly in flushes throughout the season, starting from late spring or early summer, and until the frosts.

Flower bud:
The flower bud is large, upon opening is about 4 cm (1.6 inches) in length from base of receptacle to distal end of bud and about 2 cm (0.8 inches) in diameter at its widest point. The bud form is short and globular.

When the sepals first unfold, the bud color is dark red (Group 53B to Group 46B). When the bus is ¼ open, the upper surface of petals is white (Group 155B) in middle zone with basal zone medium yellow orange (Group 11A) and intonations of medium purple red (Group 61C) in marginal zone. The lower surface of the bud is medium yellow orange (Group 16B) in the basal zone, red pink (Group 47C) in the middle zone, and red pink (Group 48A) in the marginal zone.

The colour of the sepals on the upper surface and the lower surface is medium brown green (Group 146C). The sepals are large, with the length of the sepals of about 2 – 2.2 cm (0.8 – 0.9 inches) and the width of about 1 – 1.3 cm (0.4 – 0.5 inches). They have weak foliaceous appendages on 3 of the five sepals; the apex is apiculate and the base is flat at union with receptacle. The surface texture of the upper side of the sepals is very pubescent and the lower surface is moderately pubescent. The margins are lightly pubescent. There are few to none stipitate glands present on sepals.

Peduncle is long and very strong, with about 7 – 9 cm (2.8 - 3.5 inches) average length and of 4 - 5 mm (0.16 - 0.20 inches) average diameter. The colour of the peduncle is medium brown green (Group 146C) with intonations of dark brown purple (Group 183B). There is a heavy anthocyanin, typically over 80% of peduncle, have leathery texture, flowers held upright.

Bloom:
The flowers are large for a hybrid tea rose, when fully open the average flower diameter is about 12 – 13 cm (4.7 – 5 inches) and the average flower height is about 6 cm (2.5 inches). The flowers have cupped shape, when viewed from the side upon opening on the upper part and the lower part is flat. Fully opened flower has flattened convex shape on the upper part and flat on the lower part.

The colour of the ‘Kordes Jubilee’ is very complex.

Upon opening, the outermost petals on the outer side are dark yellow (Group 15A) with intonations of red pink (Group 43C) on marginal zone. Meanwhile the inner side of the outermost petals is dark yellow (Group 14B) with intonations of red pink (Group 46D) in marginal zone. The innermost petals on the outer side are yellow-orange (Group 14D) and medium yellow orange (Group 13C) on the inner side with light yellow (Group 15D) in basal zone. Upon opening, basal petal spots have no distinctive coloration at petal base.

After opening, the outermost petals on the outer side are light yellow (Group 13D) in basal zone, light yellow with intonations of pink (Group 43D) in middle zone, and medium purple red (Group 61C) in marginal zone; while the inner side of the outermost petals is light yellow (Group 13D) in basal zone, light yellow (Group 13D) with intonations of pink (Group 43D) in middle zone, and medium purple red (Group 61C) in marginal zone. The innermost petals on the outer side are medium yellow (Group 8A) in basal zone, medium yellow (Group 8D) in middle zone, and red pink (Group 53D) in marginal zone. The inner side of the innermost petals is medium yellow (Group 8A) in basal zone, light yellow (Group 8D) in middle zone, and light red pink (Group 38B) in marginal zone. After the opening, there is no distinctive coloration at petal base observed.

The general tonality of the open flowers is bi-color light yellow (Group 16D) with red pink (Group 47D). By the end of the 4th day no change in the general tonality is observed. Afterwards, the general tonality becomes lighter, light yellow (Group 8D) with red pink (Group 53C).

On the plant the flowers last fairly long, about 5 to 8 days. As a cut flower, 4-5 days. Senesced petals drop away cleanly.

Petals:
There is many petals on a flower, approximately 100-110 petals under normal conditions. The petals reflex somewhat. They are obovate, with retuse margins, cuneate base and retuse apex. The petals are large, the outer petals are about 6 cm (2.5 inches) long and about 5 cm (2 inches) wide; the inner petals are about 3.5 cm (1.4 inches) long and about 2 cm (0.8 inches) wide. Petals are thick and have satiny texture, they are not formally arranged around the stamens.

There are some petaloids present on a flower. The average petaloids count per flower is about 15-20 per flower. The size of petaloid is about 3-15 mm long and 3-8 mm wide. The inner side of the petaloid has dark yellow colour (Group 14B) and the outer side is medium yellow (Group 9B). The petaloid have smooth texture and undulated margins. Most commonly the shape of petaloids is obovate with obtuse apex and attenuate base.

Fragrance:
The fragrance of ‘Kordes Jubilee’ is moderate, sweet, with fruity notes and reminiscent of fresh apricots

Reproductive parts:
There are about 55-60 pistils present on a flower.

The stigmas have slightly inferior location in position to anthers, colour is medium yellow orange (Group 17D).

Styles have light green colour (Group 145D) with medium red (Group 47B) intonation and the length of about 9 mm (0.4 inches).

There are approximately 65-70 stamens on average and regularly arranged.

The anthers are average, about 3 mm (0.12 inches) long and 1 mm (0.04 inches) wide, and are of medium yellow brown colour (Group 163B).

The pollen is generally present and medium yellow brown (Group 163C).

The filaments are dark yellow orange (Group N163D) and about 10 mm (0.4 inches) long.

The receptacle is medium brown green (Group 146C) with medium brown purple (Group 183D) intonations, urn-shaped, have smooth texture, about 10 mm (0.4 inches) long and 18 mm wide (0.7 inches).

Hips/seed formation were not observed.

PLANT
The rose variety ‘Kordes Jubilee’ is vigorous and strong Hybrid Tea rose, have upright to bushy growth habit. When grown as a budded field plant, the plant height is about 80 - 130 cm (2.5” – 4”) and the average plant width is 60 -70 cm (2”).

Foliage:
There are normally 5 leaflets on normal leaves in middle of the stem, there are normal quantity of foliage on a plant. The venation pattern is pyramidal net. The average leaf size is about 16 cm (6.3 inches) long and 12 cm (4.7 inches) wide.

Leaflets:
The average size of the terminal leaflet is about 6.5 – 8 cm (2.6 – 3.2 inches) in length and about 5.5 – 6 cm (2.2 – 2.4 inches) in width. The shape of the leaflets is ovate, with obtuse base and acute apex. The margins are serrated. Surface on the upper side of a leaflet is glossy and the lower side of a leaflet is matte. The texture on the upper side of leaflet is leathery while on the under side of a leaflet is smooth.

The colour of the mature foliage on the upper leaflet surface is dark brown green (Group 147A) and the lower leaflet surface is dark brown green (Group 147B). The colour of the juvenile foliage on the upper leaflet surface is dark brown green (Group 147A) and on the lower leaflet surface is dark brown green (Group 147B). There are also anthocyanin intonation of dark brown purple (Group 183C) present on the new leaflets. Leaflets arrangement is odd pinnate, the venation pattern is reticulate.

The stipules have length of about 30-34 mm (1.2 – 1.3 inches) and width of about 7 - 9 mm (0.3 - 0.4 inches), the apex have apiculate shape and the base is winged, the texture is smooth. The stipule colour is dark brown green (Group 146B) with brown red (Group 182C) anthocyanin. There are few stipitate glands, the margins are also with stipitate glands.

Petiole has a leathery texture; the average length is 3 cm (1.2 inches) and diameter about 4 mm (0.16 inches). The colour of petiole is dark brown green (Group 146B), and the underneath is medium brown green (Group 146C). The margins are with very limited numbers of stipitate glands; there are also present prickles and few stipitate glands on petioles.

Petiole rachis is 3 cm (1.2 inches) long on average and has a diameter of about 3 mm (0.12 inches). The colour of petiole rachis is medium brown green (Group 146C). There are a few small prickles underneath and limited about of stipitate glands.

Wood:
The young wood has dark brown green colour (Group 146B) and the bark is smooth. The older wood has dark brown green colour (Group 146A), and the bark is rough.

Prickles:
The average number of prickles on a stem is about 15 per each 10 cm (3.9 inches) of stem. They are large, about 7 mm (0.3 inches) long, and have a deeply concave shape. The colour of the immature prickle is dark brown purple (Group 183B); the mature prickles are purple grey (Group 187B) senescing to grey brown (Group 199A).

Small prickles:
The small prickles are not observed on the main canes and on the laterals from main canes on this variety.

Disease resistance:
The variety ‘Kordes Jubilee’ has average resistance to powdery mildew (Sphaerotheca pannosa) and very good resistance to blackspot (Diplocarpon rosae) diseases under normal growing conditions. The resistance to rust and botrytis is also very good.

The variety has been grown successfully in USDA zone 6 and warmer, in more colder climates requires winter protection.

Named in honor of the 125th anniversary of the company " W. Kordes' Söhne"

ORIGIN OF THE VARIETY
The variety 'Korgotfun' / 'Kordes Jubilee' originated from a controlled crossing in a breeding program of two distinct parents during the summer of 2003. The crossing was between an ‘un-named seedling’, the seed parent, and another ‘un-named seedling’, the pollen parent by the same inventor.

BACKGROUND OF THE VARIETY
The seeds obtained were sown in the subsequent winter. The resulting young plants were assessed and displayed unique physical and biological traits. A singular rose plant, distinguished by its superior characteristics, was chosen from the seedling beds and reproduced through asexual propagation for further examination. This novel and distinct rose variety is designated as 'Korgotfun' / 'Kordes Jubilee'.

SUMMARY OF THE VARIETY
The rose variety 'Korgotfun' / 'Kordes Jubilee' is characterized by the following unique qualities, such as:

1. Uniform growth and flowering;

2. Abundant attractive, recurrent flowers;

3. Attractive and abundant foliage; and

4. Resistance to diseases encountered in landscapes and gardens.

The unique combination of characteristics found in 'Korgotfun' / 'Kordes Jubilee' sets it apart from previously known rose cultivars, according to the inventor. These goals were largely achieved, making 'Korgotfun' / 'Kordes Jubilee' distinct from all other varieties.

As part of a rose development initiative, Tim-Hermann Kordes germinated seeds resulting from the mentioned hybridization. He then assessed and observed the resulting seedlings in a controlled environment in Offenseth-Sparrieshoop, Germany. The seedlings displayed unique physical and biological traits. In May 2004, the new rose plant 'Korgotfun' / 'Kordes Jubilee' was singled out from the seedling beds for asexual propagation and further assessment. The initial asexual propagation of 'Korgotfun' / 'Kordes Jubilee' occurred through budding in July 2004 at the inventor's nursery in Offenseth-Sparrieshoop, Germany.

The controlled environment propagations, both initial and subsequent, illustrate that 'Korgotfun' / 'Kordes Jubilee' consistently reproduces its distinctive traits in successive generations of asexual reproduction.

COMPARISON WITH PARENTS
The 'Korgotfun' / 'Kordes Jubilee' may be distinguished from its seed parent, an ‘un-named seedling’, by the following combination of characteristics:

1. 'Korgotfun' / 'Kordes Jubilee' has a nostalgic flower shape, whereas the ‘un-named seedling’ has a pointed flower shape.

2. 'Korgotfun' / 'Kordes Jubilee' has a high resistance to blackspot, whereas the ‘un-named seedling’ has an average resistance.

The 'Korgotfun' / 'Kordes Jubilee' may be distinguished from its pollen parent, an ‘un-named seedling’, by the following combination of characteristics:

1. 'Korgotfun' / 'Kordes Jubilee' has a bi-color yellow and pink flower, whereas the ‘un-named seedling’ has a yellow flower.

2. 'Korgotfun' / 'Kordes Jubilee' has a very double petal count, whereas the ‘un-named seedling’ has a semi-double petal count.

USDA zone 6 and warmer