Denomination: 'Lobtramidblu'
Trade name: Arcade Trailing Mid Blue
Botanical Name: Lobelia erinus
Applicant/Holder: Syngenta Seeds B.V.
P.O. Box 2
1600 AA
Breeder: Theodorus C. M. van Kleinwee, 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: 2005-11-07
Application Number: 06-5638
Date Withdrawn: 2008-07-30

Variety Description

Varieties used for comparison: 'Lobeto' (Laguna Dark Blue) and 'Loboudtis' (Laguna Sky Blue)

Summary: 'Lobtramidblu' has a taller plant height than 'Loboudtis'. 'Lobtramidblu' has medium foliage density while 'Lobeto' has very sparse to sparse foliage density. 'Lobtramidblu' has shorter internodes and thinner stems than 'Lobeto'. 'Lobtramidblu' has longer flowers than 'Loboudtis'. The lower lobe markings of 'Lobtramidblu' are larger than for 'Loboudtis'.


PLANT: vegetatively propagated annual, semi-upright to spreading/trailing growth habit, medium branching density, medium foliage density

STEM: medium thickness, medium green, medium anthocyanin colouration, no pubescence

LEAF: alternate arrangement, simple type, narrow elliptic shape, mucronate and acute apex, attenuate base, serrate margin, no variegation, medium to dark green upper side, very sparse pubescence

SEPAL: triangular, no anthocyanin colouration

INFLORESCENCE: raceme, terminal and axillary position, upright attitude
PEDICEL: very weak anthocyanin colouration
UPPER COROLLA LOBE: cuspidate apex, elliptic shape, violet blue upper side, no markings
LOWER COROLLA LOBE: elliptic and obovate shape, violet blue upper and lower sides, white and medium blue markings, medium size markings, very small to small yellow palate
STIGMA: purple

Origin & Breeding History: 'Lobtramidblu' originated from a controlled cross made in 2000, in Enkhuizen, The Netherlands. The cross was between the female parent identified as A0924 and the male parent variety 'Big Blue'. 'Lobtramidblu' was selected from the resultant progeny as a single plant in April 2001. It was tested as a clone one year later for greenhouse and field performance, branching and plant habit, flower colour and size and continuity criteria. The first asexual reproduction by cuttings was conducted in April 2001 in Enkhuizen.

Tests & Trials: Tests and trials were conducted in a polyhouse during the summer of 2007 in St. Thomas, Ontario. The trial included a total of 15 plants of each variety. All plants were grown from rooted cuttings and transplanted into 11 cm pots on April 23, 2007. Observations and measurements were taken from 10 plants of each variety on June 21, 2007. All colour measurements were made using the 2001 Royal horticultural Society (RHS) Colour Chart.

Comparison tables for 'Lobtramidblu' with reference varieties 'Lobeto' and 'Loboudtis'

Plant height (cm)

  'Lobtramidblu' 'Lobeto' 'Loboudtis'
mean 17.6 N/A 13.1
std. deviation 3.46 N/A 1.91

Plant internode length (cm)

  'Lobtramidblu' 'Lobeto' 'Loboudtis'
mean 1.9 2.5 1.3
std. deviation 0.46 0.36 0.32

Flower length (cm)

  'Lobtramidblu' 'Lobeto' 'Loboudtis'
mean 2.2 2.2 1.8
std. deviation 0.09 0.07 0.10

Corolla lower lobe length (cm)

  'Lobtramidblu' 'Lobeto' 'Loboudtis'
mean 1.3 1.3 1.0
std. deviation 0.06 0.11 0.06

Corolla colour (RHS)

  'Lobtramidblu' 'Lobeto' 'Loboudtis'
upper lobe- upper side 96C-D 96B with 96A at apex 96B
lower lobe- upper side 96D(apex 96B) 96B with 96D areas 96C with 96B at apex
lower lobe- lower side 96D 97C with streaks of 96B 97A, faded at margin

Click on image for larger view
Lobelia: 'Lobtramidblu' (left) with reference varieties 'Lobeto' (center) and 'Loboudtis' (right)

Click on image for larger view
Lobelia: 'Lobtramidblu' (left) with reference varieties 'Lobeto' (center) and 'Loboudtis' (right)

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