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Denomination: 'Swestrena'
Trade name: Magalena Ultra Sweet Stripe
Botanical Name: Glandularia ×hybrida
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Har Stemkens, Syngenta Seeds B.V., Enkhuizen, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-317-7511
Application Date: 2005-11-29
Application Number: 05-5187
Grant of Rights Date: 2007-11-28
Certificate Number: 3046
Date rights surrendered: 2008-12-18

Variety Description

Variety used for comparison: 'Lan Lav Star' (Lanai Lavender Star)

Summary: The main colour on the upper side of the corolla of 'Swestrena' is white and the secondary colour is purple red, whereas the main colour of the corolla of 'Lan Lav Star' is light blue violet and the secondary colour is violet.'Swestrena' has a smaller corolla than 'Lan Lav Star'.


PLANT: upright to semi-upright, tall, narrow to medium in width

STEM: medium green, dense pubescence, absent to very weak anthocyanin

LEAF: long, medium in width
LEAF BLADE: lanceolate, cuneate base, serrate margin, light green, no anthocyanin
PETIOLE: short

INFLORESCENCE: medium in diameter, broad ovate in profile
CALYX: absence of anthocyanin
COROLLA: medium to large in diameter, two-coloured, star shaped, main colour white, secondary colour purple red, weakly fading with age
COROLLA LOBES: free, mostly incurved, moderate undulation of margin
COROLLA TUBE: protruding hair light green to yellow in colour
COROLLA EYE ZONE: present on one lobe, mostly green-yellow.

Origin & Breeding History: 'Swestrena' was discovered and developed in Enkhuizen, The Netherlands, by the breeder Har Stemkens, an employee of Syngenta Seeds B.V. The new variety was discovered in 2003 as a mutation of verbena 'Arbena', and the new variety was selected based on a unique flower colour pattern. The variety has been propagated asexually through vegetative cuttings over a two year period.

Tests & Trials: The tests and trials for 'Swestrena' were conducted in a polyhouse during the spring and summer of 2006, at BioFlora Inc. in St. Thomas, Ontario. The trial included 15 plants of each variety. Rooted cuttings were transplanted into 10 cm pots on April 18, 2006. Observations and measurements were taken from 10 plants of each variety on June 17 to 19, 2006. All colour measurements were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Swestrena' with reference variety 'Lan Lav Star'

Plant width (cm)

  'Swestrena' 'Lan Lav Star'
mean 41.7 52.0
std. deviation 4.98 7.02

Leaf blade width (mm)

  'Swestrena' 'Lan Lav Star'
mean 19.5 27.1
std. deviation 2.17 2.88

Petiole length (mm)

  'Swestrena' 'Lan Lav Star'
mean 4.1 6.8
std. deviation 1.20 1.14

Corolla diameter (mm)

  'Swestrena' 'Lan Lav Star'
mean 20.8 23.2
std. deviation 0.63 0.92

Colour on upper side of corolla (RHS)

  'Swestrena' 'Lan Lav Star'
main colour 155B 76D
secundary colour 58B N81C

Click on image for larger view
Verbena: 'Swestrena' (left) with reference variety 'Lan Lav Star' (right)

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