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Denomination: 'Chewallbell'
Trade name: Oso Easy Pink Cupcake
Botanical Name: Rosa
Applicant/Holder: Spring Meadow Nursery, Inc.
12601 120th Avenue
Grand Haven, Michigan
United States of America
Breeder: Christopher Hugh Warner, Newport, Shropshire, United Kingdom
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-317-7511
Application Date: 2012-09-07
Application Number: 12-7728
Grant of Rights Date: 2015-10-13
Certificate Number: 5129
Date rights surrendered: 2019-10-13

Variety Description

Variety used for comparison: 'Pink Home Run'

Summary: The flower bud of 'Chewallbell' is dark pink red whereas it is purple red for 'Pink Home Run'. The flowers of 'Chewallbell' are semi-double to double type while those of 'Pink Home Run' are single type. The number of petals for 'Chewallbell' is greater than those of 'Pink Home Run'. The density of petals for 'Chewallbell' is medium where as it is very loose for 'Pink Home Run'. The main colour of the inner side of the petal of 'Chewallbell' is blue pink whereas it is purple red for 'Pink Home Run'. The colour of the filament of the outer stamen is white for 'Chewallbell' while the filament of 'Pink Home Run' is medium yellow.


PLANT: shrub type, semi upright growth habit
YOUNG SHOOT: medium intensity of anthocyanin colouration
STEM: medium to many predominantly reddish prickles

LEAF: strong intensity of anthocyanin colouration when newly open, medium to dark green on upper side, anthocyanin colouration present on upper side, medium to strong glossiness on upper side, absent or very weak undulation on leaflet margin
TERMINAL LEAFLET: medium elliptic, acute base, acuminate apex

FLOWERING SHOOT: flowering laterals present
SEPAL: absent or very weak extensions
FLOWER BUD: medium ovate in longitudinal section, dark pink red (pinker than RHS 51A)
FLOWER: semi-double to double type, round when viewed from above, flat upper part and concave lower part when viewed from the side, pink colour group, absent or weak fragrance, medium density of petals, no reflexing of petals one by one
PETAL: obovate, absent or very weak incisions, medium reflexing of margin, weak undulation, one colour on inner side, inner side is blue pink (closest to RHS 62A) fading towards the base, occasionally white (RHS NN155A-B) secondary colour present along midrib, basal spot on inner side is very small and light yellow
FILAMENT: predominantly white

Origin & Breeding History: 'Chewallbell' was bred and developed by Christopher Hugh Warner in Newport, Shropshire, United Kingdom. It originated from a controlled cross conducted in June 1999 between the variety 'Anna Livia' as the female parent and 'Scrivbell' as the male parent. 'Chewallbell' was selected in 2005 based on its disease resistance, glossy foliage, free flowering habit, attractiveness and abundance of flowers, and flower colour. Asexual reproduction of 'Chewallbell' was first conducted by softwood cuttings in 2005 in Newport, Shropshire, United Kingdom.

Tests & Trials: The comparative trial for 'Chewallbell' was conducted outdoors during the summer of 2014 at BioFlora Inc. in St. Thomas, Ontario. The trial included a total of 10 plants each of the candidate and reference variety. All plants were grown from liners transplanted into 9 litre pots in July 2013. Observations and measurements were taken from 10 plants or parts of plants of each variety on July 21, 2014. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Chewallbell' with reference variety 'Pink Home Run'

Colour of flower bud (RHS)

  'Chewallbell' 'Pink Home Run'
outer side pinker than 51A redder than N57A

Number of petals

  'Chewallbell' 'Pink Home Run'
mean 22.2 5.0
std. deviation 3.27 0.00

Colour of inner side of petal (RHS)

  'Chewallbell' 'Pink Home Run'
main closest to 62A N57A-B
secondary NN155A-B (may be present) N/A

Click on image for larger view
Rose: 'Chewallbell' (left) with reference variety 'Pink Home Run' (right)

Click on image for larger view
Rose: 'Chewallbell' (left) with reference variety 'Pink Home Run' (right)

Click on image for larger view
Rose: 'Chewallbell' (left) with reference variety 'Pink Home Run' (right)

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