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Denomination: 'Chewmaytime'
Trade name: Oso Easy Paprika
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: 2006-08-01
Application Number: 06-5565
Grant of Rights Date: 2008-11-21
Certificate Number: 3401
Grant of Rights Termination Date: 2026-11-21

Variety Description

Varieties used for comparison: 'Horcoherent' (Oso Easy Peach Cream) and 'Celine Dion'

Summary: The plant of 'Chewmaytime' is a ground cover type with spreading growth habit while that of 'Celine Dion' is a shrub type with upright growth habit. 'Chewmaytime' has smaller, darker green leaves and terminal leaflets than 'Celine Dion'. The shape of the flower bud in longitudinal section is ovoid for 'Chewmaytime' while it is pointed for 'Celine Dion'. The sepal extensions of 'Chewmaytime' are moderate while those of 'Horcoherent' are very weak and those of 'Celine Dion' are strong. 'Chewmaytime' has shorter sepals, a smaller flower diameter and smaller petals than both reference varieties. The flowers of 'Chewmaytime' are single type while those of the reference varieties are semi-double. The overall flower colour of 'Chewmaytime' is a bi-coloured orange and yellow while it is blended orange, pink and yellow for 'Horcoherent' and red orange for 'Celine Dion'.


PLANT: ground cover type, spreading growth habit
YOUNG SHOOT: strong intensity of medium purple red anthocyanin colouration
PRICKLES/THORNS: linear to concave, average number of short prickles, no long prickles, purple red

ENTIRE LEAF: medium to dark green, strong glossiness of upper side, five to seven leaflets
TERMINAL LEAFLET: serrulate margin, thin texture, obtuse base

FLOWERING PERIOD: almost continuous from June until frost
PEDICEL: few prickles
FLOWER BUD: ovoid in longitudinal section, yellow to light yellow with red pink petal tips
FLOWER: medium number per flowering shoot, irregularly rounded when fully open and viewed from above, flat upper part when viewed from the side, flat to concave lower part when viewed from the side, normal centre, single type, overall colour is a bicolour of orange and yellow
PETAL: upper side is red with a yellow base, lower side is light yellow with a yellowish margin and light yellow base, small sized basal spot on upper and lower sides, weak reflexing of margin, absent to very weak undulation of margin
REPRODUCTIVE ORGANS: filament on outer stamens is yellow, style is short and red, stigma is positioned below anthers, very small receptacle, receptacle in longitudinal section is pitcher shaped, prickles present at base of receptacle
FRAGRANCE: medium strength

Origin & Breeding History: 'Chewmaytime' was developed by the breeder, Christopher Hugh Warner, in Greenfields, Brockton, Newport, Shropshire, United Kingdom. It originated from a cross made in 1991 between an unnamed Rose seedling as the female parent and Rose variety 'Laura Ford' as the male parent. 'Chewmaytime' was selected from the progeny in 1992 based on its flower colour, flower type, flower size and disease resistance. Asexual reproduction by softwood cuttings was first conducted in July 1993 in Brockton, United Kingdom.

Tests & Trials: Trials for 'Chewmaytime' were conducted in the field during the summer of 2007 at BioFlora Inc. in St. Thomas, Ontario. There were eight (8) plants per variety. Rooted plants were transplanted to the field in May 2007. The plants were spaced 0.6 meters apart in rows which were 0.9 meters apart. All observations and measurements were taken on September 23, 2007. All colour determinations were made using the 2001 Royal Horticulture Society (RHS) Colour Chart.

Comparison tables for 'Chewmaytime' with reference varieties 'Horcoherent' and 'Celine Dion'

Entire leaf length (cm)

  'Chewmaytime' 'Horcoherent' 'Celine Dion'
mean 7.7 7.4 11.1
std. deviation 0.48 0.98 1.60

Entire leaf width (cm)

  'Chewmaytime' 'Horcoherent' 'Celine Dion'
mean 4.5 3.8 7.3
std. deviation 0.34 0.41 1.17

Terminal leaflet length (cm)

  'Chewmaytime' 'Horcoherent' 'Celine Dion'
mean 2.7 2.5 4.9
std. deviation 0.18 0.16 1.11

Terminal leaflet width (cm)

  'Chewmaytime' 'Horcoherent' 'Celine Dion'
mean 1.5 1.7 2.9
std. deviation 0.16 0.14 0.54

Sepal length (mm)

  'Chewmaytime' 'Horcoherent' 'Celine Dion'
mean 16.2 22.4 29.6
std. deviation 0.45 1.95 2.61

Flower diameter (cm)

  'Chewmaytime' 'Horcoherent' 'Celine Dion'
mean 5.1 6.4 8.2
std. deviation 0.11 0.55 0.55

Petal length (cm)

  'Chewmaytime' 'Horcoherent' 'Celine Dion'
mean 2.3 3.2 3.9
std. deviation 0.12 0.19 0.37

Petal width (cm)

  'Chewmaytime' 'Horcoherent' 'Celine Dion'
mean 2.0 2.7 3.8
std. deviation 0.31 0.33 0.38

Colour of upper side of petal (RHS)

  'Chewmaytime' 'Horcoherent' 'Celine Dion'
margin 43B 49D-N155D with 62B tones more orange than 45B
middle 43A-33A 49D-N155D with 62B speckles N30A
base 6A 6B 9A

Colour of lower side of petal (RHS)

  'Chewmaytime' 'Horcoherent' 'Celine Dion'
margin pinker than 19A 11D with 62C tones 46C-D
middle 8B 11D blended 43C & 33C
base 8B 3D 5C

Click on image for larger view
Rose: 'Chewmaytime' (left) with reference varieties 'Horcoherent' (centre) and 'Celine Dion' (right)

Click on image for larger view
Rose: 'Chewmaytime' (left) with reference variety 'Horcoherent' (right)

Click on image for larger view
Rose: 'Chewmaytime' (left) with reference variety 'Celine Dion' (right)

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