Denomination: 'Caltrarosan'
Trade name: Priviliged Trailing Antique Rose
Botanical Name: Calibrachoa
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Johannes S.N. Oud, Syngenta Seeds B.V., Enkhuizen, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2006-10-16
Application Number: 06-5607
Date Withdrawn: 2009-09-23

Variety Description

Varieties used for comparison: 'Caltraelbu' (Priviliged Trailing Electric Burgundy) and 'USCALI11' (Superbells Pink)

Summary: The plants of 'Caltrarosan' have a trailing growth habit while those of 'USCALI11' are upright. 'Caltrarosan' is shorter than both reference varieties, wider than 'Caltraelbu' and narrower than 'USCALI11'. The leaves of 'Caltrarosan' are narrower than those of 'USCALI11'. 'Caltrarosan' has longer sepals than 'Caltraelbu'. The flowers of 'Caltrarosan' are larger than those of both reference varieties. 'Caltrarosan' is light blue pink on the lower side of the corolla while both reference varieties are blue pink. The apex of the corolla lobes of 'Caltrarosan' are cuspidate and truncate while those of 'USCALI11' are rounded. 'Caltrarosan' has stronger conspicuousness of veins on the inner side of the corolla tube than both reference varieties.


PLANT: trailing growth habit, short, narrow to medium width

LEAF BLADE: elliptic, narrow acute apex, no variegation, medium green on upper side, no blistering
PETIOLE: short

SEPAL: short to medium length, narrow, rhombic, no anthocyanin colouration
FLOWER: single, large diameter, salverform, short pedicel
COROLLA: weak to medium degree of lobing, one coloured on upper side
COROLLA LOBE: purple red (RHS N57B-C) on upper side, red veins, weak to medium conspicuousness of veins on upper side, light blue pink (RHS 55D) on lower side, cuspidate and truncate apex
COROLLA TUBE: medium length, yellow (RHS 12A) on inner side, medium conspicuousness of veins on inner side
ANTHER: yellow before pollen dehiscence

Origin & Breeding History: 'Caltrarosan' originated from a controlled cross in 2003 between the female parent identified as C4459 and the male parent identified as Z4012. The cross was conducted by the breeder J. Oud in Enkhuizen, The Netherlands. The new variety 'Caltrarosan' was selected from the resultant progeny as a single plant in 2004 based on plant growth habit, flower colour and time of flowering. Asexual reproduction by cuttings was first conducted in August 2004 in Enkhuizen, The Netherlands.

Tests & Trials: Trials for 'Caltrarosan' were conducted in a polyhouse during the spring of 2008 in St. Thomas, Ontario. The trials included a total of 20 plants each of the candidate and reference varieties. All plants were grown from rooted cuttings and transplanted into 30 cm hanging baskets on May 23, 2008. Each basket contained 4 cuttings with a total of 5 baskets per variety. Observations and measeurements were taken from 10 plants of each variety on July 22, 2008. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Caltrarosan' with reference varieties 'Caltraelbu' and 'USCALI11'

Plant height (cm)

  'Caltrarosan' 'Caltraelbu' 'USCALI11'
mean 12.8 16.1 20.9
std. deviation 0.45 2.04 2.73

Plant width (cm)

  'Caltrarosan' 'Caltraelbu' 'USCALI11'
mean 56.5 53.5 65.0
std. deviation 1.58 1.58 5.09

Leaf blade width (cm)

  'Caltrarosan' 'Caltraelbu' 'USCALI11'
mean 0.9 1.0 1.2
std. deviation 0.20 0.24 0.16

Sepal length (cm)

  'Caltrarosan' 'Caltraelbu' 'USCALI11'
mean 0.9 0.6 0.8
std. deviation 0.10 0.12 0.13

Flower diameter (cm)

  'Caltrarosan' 'Caltraelbu' 'USCALI11'
mean 3.8 3.1 3.0
std. deviation 0.19 0.19 0.19

Main colour of corolla lobe (RHS)

  'Caltrarosan' 'Caltraelbu' 'USCALI11'
lower side 55D 73A N74C

Click on image for larger view
Calibrachoa: 'Caltrarosan' (left) with reference varieties 'Caltraelbu' (centre) and 'USCALI11' (right)

Click on image for larger view
Calibrachoa: 'Caltrarosan' (left) with reference varieties 'Caltraelbu' (centre) and 'USCALI11' (right)

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