Rose Ambiance

FLOWER
Blooms in flushes throughout the season.

Flower bud:
Has large, rounded flower buds. Flower pedicel has few prickles.

Bloom:
‘Ambiance’ has large flowers with average diameter of 9 cm under normal growing conditions. They are very full, rounded upper, flattened convex lower profile, sepal extensions are weak.

This variety has impressive lasting period on the plant – about 10 - 12 days, and up to 14 – 18 days as a cut flower under normal growing conditions.

Petals:
Petals have medium size, the colour of the middle zone inner side light yellow (RHS 12C), margin inner side medium purple red (RHS 57C), middle zone outer side is light yellow (RHS 10B), margin outer side pale yellow (RHS 2D), basal spot absent on both sides, margin reflexing strong, undulation is weak.

The petals count is about 60 – 62 petals on average. They are dense, resistant to unfavorable weather conditions.

Fragrance:
The fragrance is absent or weak.

Reproductive parts:
The stamen filament is yellow. Seed vessel is small, pitcher shaped.

PLANT
‘Ambiance’ has upright, narrow and bushy growth habit.

Young vegetative shoots have strong anthocyanin coloration, reddish brown.

Foliage:
Leaves are large, medium green, glossiness on the upper side is absent to weak. Terminal leaflet is about 8.2 cm in length and 4.8cm in width, has flat cross section, weak undulation margin, the leaf base is rounded.

Prickles: Stem thorns are present, the average length is about 11 mm, the lower surface is concave.

Disease resistance:
The variety showed medium resistance to black spots and mildew under normal growing conditions. Has good resistance to botrytis.

Has good resistance to rain and heat.

Unfortunately we do not have information about the origin of the name of this rose.

ORIGIN OF THE VARIETY
Controlled pollination took place in Ventimiglia, Italy.

Seed parent was Female parent - unnamed seedling which is result of cross pollination the lineage of which can be summarized by following; [‘Papa Meilland’ x (‘Ilona’ x ‘Marina’)].

The Male parent - pollen parent was unnamed seedling (dominated by JP 773372 prior relatives unknown) in a planned breeding program.

SUMMARY OF THE VARIETY From the seedlings of the abovementioned cross pollination were selected a plant by the following selection criteria: selected on the basis of flower size, long vase life, good bud and flower form and unusual yellow with red to purple edge colour.

Propagation was conducted by vegetative methods through many generations in Ventimiglia, Italy. The reproduction of this variety showed that the foregoing and all other characteristics and distinctions come true to form and are established and transmitted through succeeding propagations.

COMPARISON WITH PARENTS
The seed parent was characterised by red flower colour, and the pollen parent was characterised by fewer thorns. Both parents are proprietary breeding stock plants within breeder’s private collection.

COMPARISON WITH THE CLOSEST COMMERCIALLY AVAILABLE CULTIVAR
Rose ‘Cocktail’ was chosen as the sole comparator as it is in the opinion of the qualified person the most similar cut flower variety of common knowledge based on flower colour. The parents were not considered for the reasons stated above.

Comparative Trial were taken at Cranbourne, VIC, Jul – Nov 1999. The plants grew in the soil within an environmentally controlled glasshouse. For measurements were taken 20 random samples of each variety collected over a five-month period.

The comparison showed that ‘Ambiance’ / ‘Nirpnufdeu’ has larger flowers of light yellow colour (Group 12C) with medium purple red (Group 57D) edges, flowers have no aroma while the ‘Cocktail’ has darker medium yellow (Group 12B) flowers with light yellow edges that become pink with time and has strong fragrance. Additionally, ‘Ambiance’ / ‘Nirpnufdeu’ has larger medium-green leaves, and ‘Cocktail’ has smaller dark-green leaves.

USDA zone 6 and warmer