Denomination: 'Barthirtythree'
Botanical Name: Phlox paniculata
Applicant/Holder: Bartels Stek B.V.
P.O. Box 26
2678 ZG
De Lier
Breeder: G.B.H. Bartels, Bartels Breeding B.V., Aalsmeer, Netherlands
Agent in Canada: Genesis Plant Propagation Ltd.
24245 48th Avenue
Langley, British Columbia
Tel: 604-514-1799
Application Date: 2006-04-06
Application Number: 06-5421
Grant of Rights Date: 2007-11-22
Certificate Number: 3003
Date rights surrendered: 2014-11-17

Variety Description

Variety used for comparison: 'Barten'

Summary: Barthirtythree' has a taller wider plant than that of 'Barten'. The leaf of 'Barthirtythree' is larger than that of 'Barten'. 'Barthirtythree' has a longer cyme than that of 'Barten'. 'Barthirtythree' has more florets than that of 'Barten'.


PLANT: perennial, upright to bushy growth habit, begins flowering in midseason

LEAF: lanceolate shape, no glandular stickiness, very sparse to no pubescence on upper and lower side, medium green

CYME: domed shape, single
FLORET: round shape, bicolour, violet with white around the eye zone on the upper side, violet on lower side

Origin & Breeding History: 'Barthirtythree' was discovered in Aalsmeer, The Netherlands in 1995 by seedling selection as a product of a planned breeding program. The cross of female parent 94.8 with the male parent 94.3 took place in 1994. Selection criteria included dwarf growth habit and suitability for potting production.

Tests & Trials: Tests and trials were conducted during the summer of 2006 in Langley, British Columbia. Trials consisted of 25 plants of each variety individually grown in 1 gallon pots outdoors. Observations and measurements were taken from 10 plants of each variety. Colour determinations were done using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Barthirtythree' with reference variety 'Barten'

Plant height (cm)

  'Barthirtythree' 'Barten'
mean 41.0 32.0
std. deviation 1.89 0.82

Plant width (cm)

  'Barthirtythree' 'Barten'
mean 31.6 25.0
std. deviation 1.35 1.12

Leaf length (cm)

  'Barthirtythree' 'Barten'
mean 11.5 8.1
std. deviation 0.91 0.57

Leaf width (cm)

  'Barthirtythree' 'Barten'
mean 5.6 4.2
std. deviation 0.21 1.13

Number of florets (count)

  'Barthirtythree' 'Barten'
mean 432 185
std. deviation 27.5 7.6

Cyme length (cm)

  'Barthirtythree' 'Barten'
mean 31.5 16.0
std. deviation 4.55 0.49

Petal colour (RHS)

  'Barthirtythree' 'Barten'
upper side apical zone N78B N81B
upper side basal zone 155D 155D
lower side apical zone N78C 155D
lower side basal zone N78C N81D

Click on image for larger view
Phlox: 'Barthirtythree' (left) with reference variety 'Barten' (right)

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