Novarospop

Rose

Variety Description

Variety used for comparison: 'Scrivjean' (Oso Easy Honey Bun)

Summary: The leaf of 'Novarospop' is medium to large while the leaf of 'Scrivjean' is small to medium sized. The flower of 'Novarospop' is a double type while the flower of 'Scrivjean' is a semi-double type. The inner side of the petal of 'Novarospop' has only one colour evenly distributed throughout whereas that of 'Scrivjean' has two colours present. The main colour on the inner side of the petal of 'Novarospop' is light yellow changing to light yellow orange and fading to white with purple red flecks at the margin of the petals of the outer whorl while that of 'Scrivjean' is light red pink fading to lighter red pink and further fading to white. The secondary colour on the inner side of the petal of 'Novarospop' is absent while for 'Scrivjean' it is light yellow at the mid-section fading to white with age.

Description:

PLANT: shrub type, semi-upright growth habit
YOUNG SHOOT: very weak intensity of anthocyanin colouration
PRICKLES: few, reddish

LEAF: medium to large, medium to dark green on upper side, no anthocyanin colouration on upper side, medium to strong glossiness on upper side
LEAFLET: weak to medium undulation of the margin
TERMINAL LEAFLET: ovate, rounded base, acuminate apex

FLOWERING SHOOT: no flowering laterals
FLOWER BUD: medium ovate in cross-section
FLOWER: double type, yellow blend colour group, medium density of petals, round shape when viewed from above, upper part is flattened convex when viewed from side, lower part is flattened convex when viewed from side, medium fragrance, no reflexing of petals one-by-one
SEPAL: absent or very weak extensions
PETAL: medium sized, obcordate shape, inner side has one colour evenly distributed throughout, inner side is light yellow (RHS 10B) changing to light yellow orange (RHS 11D) and fading to white (RHS 155B) with purple red (RHS N57B) at the tip with age, absent or very weak incisions of margin, weak reflexing of margin, weak undulation of margin; basal spot small to medium sized, medium yellow

OUTER STAMEN: filaments are predominantly medium yellow

SEED VESSEL: small at time of petal fall
HIP: pitcher-shaped in longitudinal section

Origin & Breeding History: 'Novarospop' originated from the irradiation of in vitro cultures of the Rosa variety 'Meiggili' by gamma rays by the breeder Dr. Michael S. Dobres at the University of Pennsylvania in Philadelphia, USA in January 2007. The resultant cultures were rooted and transplanted in May 2007 and screened for novel phenotypes. The initial selection criteria were attractive flower colour, bushy, rounded growth habit, attractive foliage and resistance to black spot, powdery mildew and rust. The final selection of 'Novarospop' was made in September 2011 at the Conard-Pyle Co. greenhouse/nursery facilities in West Grove, Philadelphia, USA.

Tests & Trials: The comparative trial for 'Novarospop' was conducted outdoors during the summer of 2015 at Variety Rights Management in Oxford Station, Ontario. The trial included a total of 12 plants each of the candidate and reference variety. All plants were grown in 22 cm pots spaced 45 cm apart. Observations and measurements were taken from 10 plants, or parts of plants, of each variety in mid-September 2015. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison table for 'Novarospop' with reference variety 'Scrivjean'

Colour of inner side of petal (RHS)

Click on image for larger view

Rose: 'Novarospop' (left) with reference variety 'Scrivjean' (right)