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Dulcena

Verbena

Denomination: 'Dulcena'
Trade name: Babylon Light Blue
Botanical Name: Glandularia ×hybrida
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Basel
4058
Switzerland
Breeder: Jolanda Dekker, Syngenta Seeds B.V., Enkhuizen, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-317-7511
Application Date: 2001-09-14
Application Number: 01-2817
Grant of Rights Date: 2004-06-16
Certificate Number: 1844
Date rights surrendered: 2014-06-16

Variety Description

Variety used for comparison: 'Sunmaref TP-L' (Tapien Lavender)

Summary: 'Dulcena' differs from the reference variety in flower colour, growth habit, foliage size, diameter of the inflorescence and florets. 'Dulcena' is a paler shade of lavender than 'Sunmaref TP-L'. The growth habit of 'Dulcena' is medium to semi-creeping whereas it is drooping in 'Sunmaref TP-L'. The foliage of 'Dulcena' is larger than that of 'Sunmaref TP-L'. The diameter of the inflorescence of 'Dulcena' is small to medium whereas it is very small in 'Sunmaref TP-L'.

Description:

'Dulcena' is an annual verbena with a medium to semi-creeping growth habit. The medium green stems have sparse pubescence with weak anthocyanin colouration along the edges. The dark green leaves are lanceolate to ovate with a cuneate-shaped base. The leaf blades are divided to dissected with rounded margins and an acute tip. Anthocyanin colouration is absent. There is no pubescence on the upper and lower leaf surfaces.

The inflorescence is a domed corymb which is both axillary and terminal in location. The bracts of the single florets are smaller in size than the calyx. The calyx has anthocyanin colouration on the teeth only. The florets are medium in size. The arrangement of the corolla lobes is free with curvature in longitudinal axis incurved. The undulation of the corolla lobes is weak to medium. There is one corolla colour with a cream coloured eye present on all lobes. The corolla colour of 'Dulcena' fades to blue with age. The corolla throat hairs are cream.

Origin & Breeding History: 'Dulcena' was developed at Syngenta Seeds B.V. in Enkhuizen, The Netherlands. It resulted from a cross between 'Y 711' and 'U 1012' which took place in 1996. 'Dulcena' was selected in 1997 based on flower colour and growth habit. It was developed by clonal selection and propagated vegetatively by cuttings.

Tests & Trials: Tests and trials for 'Dulcena' were conducted in a double poly greenhouse at BioFlora Inc., St. Thomas, Ontario during the summer of 2003. Trials consisted of 15 plants/variety with one cutting/152mm round pot. Colour characteristics were determined using the 2001 RHS colour chart. Measured characteristics were based on 10 measurements.


Comparison tables for 'Dulcena' with reference variety 'Sunmaref TP-L'

Leaf blade length (cm)

  'Dulcena' 'Sunmaref TP-L'
mean 3.51 2.66
std. deviation 0.685 0.636

Leaf blade width (cm)

  'Dulcena' 'Sunmaref TP-L'
mean 2.54 2.05
std. deviation 0.285 0.396

Inflorescence diameter (cm)

  'Dulcena' 'Sunmaref TP-L'
mean 5.11 3.77
std. deviation 0.137 0.116

Floret diameter (mm)

  'Dulcena' 'Sunmaref TP-L'
mean 19.50 15.35
std. deviation 1.269 1.651

Main colour of floret (RHS)

  'Dulcena' 'Sunmaref TP-L'
upper side N82C, fades to N82D on older flowers N82C with N87C margins
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