Language selection




Denomination: 'CA33'
Trade name: Bill Reid
Botanical Name: Rosa
Applicant/Holder: Agriculture & Agri-Food Canada
Office of Intellectual Property and Commercialization
107 Science Place
Saskatoon, Saskatchewan
S7N 0X2
Breeder: Campbell Davidson, Agriculture & Agri-Food Canada, Swift Current, Saskatchewan
Agent in Canada: Canadian Nursery Landscape Association
7856 Fifth Line South, R.R. 4
Milton, Ontario
L9T 2X8
Tel: 888-446-3499
Application Date: 2011-05-31
Application Number: 11-7296
Grant of Rights Date: 2013-02-22
Certificate Number: 4472
Grant of Rights Termination Date: 2031-02-22

Variety Description

Variety used for comparison: 'Morden Sunrise'

Summary: The flower diameter of 'CA33' is larger than that of 'Morden Sunrise'. The petals of 'CA33' are longer and wider than those of 'Morden Sunrise'. The main colour of the inner and outer sides of the petal of 'CA33' is yellow whereas it is orange brown on 'Morden Sunrise'. The secondary colour of the petal of 'CA33' is orange whereas it is yellow on the petal of 'Morden Sunrise'.


PLANT: shrub type, intermediate growth habit
PRICKLES/THORNS: absent or very few, reddish
LEAF: medium size, medium green on upper side, anthocyanin colouration absent, weak glossiness on upper side, absent or very weak undulation of margin
TERMINAL LEAFLET: medium elliptic shape, obtuse base, acuminate apex

FLOWERING SHOOT: flowering laterals absent, very few flowers per flowering shoot
FLOWER BUD: medium ovate shape in longitudinal section
FLOWER: semi-double type, yellow colour group, green centre, very loose petal density, round when viewed from above, convex profile on upper part, flattened convex profile on lower part, absent or weak fragrance, strong sepal extensions
PETAL: reflexing of petals present, transverse elliptic shape, absent or very weak incisions, medium reflexing of margins, medium undulation of the margin, medium size, two colours, main colour on inner and outer sides yellow (RHS 12A), secondary colour orange (RHS 26D) as a flush
BASAL PETAL SPOT: very small, orange yellow on inner side
OUTER STAMEN: predominantly orange filament (RHS 17A)

SEED VESSEL: small at petal fall
HIP: pitcher-shaped in longitudinal section, orange at maturity

Origin & Breeding History: 'CA33' arose from the cross 'Morden Sunrise' by 'Golden Celebtraion' conducted at the Agriculture and Agri-Food Canada Morden Research Station, Morden, Manitoba in 1996. Selection criteria included hardiness, flower colour and disease tolerance.

Tests & Trials: Trials for 'CA33' were conducted in plots at the Prairie Shade Nursery, Portage la Prairie, Manitoba during the summer of 2011. The trial included a total of 10 plants each of the candidate and reference varieties spaced 2 metres apart between rows and 0.6 metres apart in rows. All plants were grown from 2 year old plants previously grown in 2 gallon pots. Observations and measurements were taken from 10 plants of each variety. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'CA33' with reference variety 'Morden Sunrise'

Flower diameter (mm)

  'CA33' 'Morden Sunrise'
mean 84.7 70.8
std. deviation 9.4 4.1

Petal length (mm)

  'CA33' 'Morden Sunrise'
mean 39.5 32.4
std. deviation 1.9 4.8

Petal width (mm)

  'CA33' 'Morden Sunrise'
mean 40.8 36.4
std. deviation 2.6 4.6

Colour of inner side of petal (RHS)

  'CA33' 'Morden Sunrise'
main 12A 33C
secondary 26D, flush 12A, at base

Colour of outer side of petal (RHS)

  'CA33' 'Morden Sunrise'
main 12A 33C

Click on image for larger view
Rose: 'CA33' (left) with reference variety 'Morden Sunrise' (right)

Date modified: