Denomination: 'Sylvester'
Botanical Name: Coreopsis verticillata
Applicant/Holder: Takii Europe B.V.
Hoofdweg 19, 1424 PC
De Kwakel
Breeder: Maarten van der Sar, Takii Europe B.V., Maasland, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2012-11-15
Application Number: 12-7802
Grant of Rights Date: 2014-09-04
Certificate Number: 4867
Grant of Rights Termination Date: 2032-09-04

Variety Description

Variety used for comparison: 'Zagreb'

Summary: The plants of 'Sylvester' are shorter than those of 'Zagreb'. The flowers of 'Sylvester' are smaller than those of 'Zagreb'.


PLANT: upright bushy to bushy-rounded growth habit, dense branching
STEM: light green, absent or very weak anthocyanin colouration, very sparse pubescence, medium thickness, smooth with weak ribbing

LEAF: opposite arrangement, compound, medium number of leaflets
LEAFLET BLADE: linear, acute apex, attenuate base, divided margin, sparse pubescence on upper and lower sides, weak glaucosity on upper side, upper side medium green, lower side light green, no variegation, no petiole

PEDUNCLE: present, absent or very weak anthocyanin colouration, absent or very sparse pubescence
FLOWER: both terminal and axillary positions, erect attitude
RAY FLORET: medium number, arrangement ranging from touching to overlapping, straight along longitudinal axis of majority, elliptic, obtuse with dentate tip, absent or very weak recurvature of tip, weak pubescence on outer side, upper and lower sides yellow (RHS 12A)
DISC: present

Origin & Breeding History: 'Sylvester' originated from an open pollination conducted in June 2003 at Boskoop, Netherlands as part of a controlled breeding program. The pollination was conducted between the seed parent variety 'Zagreb' and pollen from an unknown variety. The initial selection was made in June 2007 based on growth habit. Asexual propagation since that time has been through the use of vegetative cuttings.

Tests & Trials: Trials for 'Sylvester' were conducted in a polyhouse during the summer of 2013 in St. Thomas, Ontario. The trial included 20 plants each of the candidate and reference variety. Plants were grown from rooted cuttings and transplanted into 15 cm pots on April 25, 2013. Observations and measurements were taken from 10 plants of each variety on June 25, 2013. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Sylvester' with reference variety 'Zagreb'

Plant height (cm)

  'Sylvester' 'Zagreb'
mean 26.4 35.8
std. deviation 1.41 2.41

Flower diameter (cm)

  'Sylvester' 'Zagreb'
mean 3.8 4.5
std. deviation 0.16 0.29

Click on image for larger view
Coreopsis: 'Sylvester' (left) with reference variety 'Zagreb' (right)

Click on image for larger view
Coreopsis: 'Sylvester' (left) with reference variety 'Zagreb' (right)

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