Denomination: 'Bartwentynine'
Trade name: White Flame
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: 2005-03-10
Application Number: 05-4624
Grant of Rights Date: 2006-08-29
Certificate Number: 2507
Date rights surrendered: 2014-08-12

Variety Description

Varieties used for comparison: 'Bareleven' (Light Pink Flame) and 'Barfourteen' (Purple Flame)

Summary: 'Bartwentynine' has a bushier growth habit than 'Barfourteen'. The plant height of 'Bartwentynine' is shorter than 'Bareleven' and 'Barfourteen'. 'Bartwentynine' has a slightly wider plant than 'Barfourteen'. The leaf shape of 'Bartwentynine' is lanceolate while it is linear-subulate for 'Barfourteen'. 'Bartwentynine' has a shorter cyme with fewer florets than 'Bareleven' and 'Barfourteen'. 'Bartwentynine' has a white flower colour while it is pink in 'Bareleven' and purple in 'Barfourteen'.


'Bartwentynine' is a perennial phlox variety with an upright to bushy growth habit. The leaves are a simple type arranged in an opposite fashion. The leaf is lanceolate in shape with a leaf blade margin that is entire. There is no pubescence on the upper or lower side of the leaf blade. The upper side of the leaf blade is medium green.

There is one flowering period that is mid season. The flower type is a cyme inflorescence. The cyme is dome shaped. The round florets are white.

Origin & Breeding History: 'Bartwentynine' originated from a seedling selection of the cross 94.08 x which took place in Aalsmeer, The Netherlands in 1995. The selection criteria was based on dwarf growth habit.

Tests & Trials: Tests and trials for 'Bartwentynine' were conducted in the summer of 2005 at Genesis Plant Propagation Ltd., Langley, B.C. The trials consisted of 100 plants of each variety, each grown outdoors in 1 gallon pots.

Comparison tables for 'Bartwentynine' with reference varieties 'Bareleven' and 'Barfourteen'

Plant height (cm)

  'Bartwentynine' 'Bareleven' 'Barfourteen'
mean 25.9 28.6 33.1
std. deviation 1.5 7.0 1.0

Plant width (cm)

  'Bartwentynine' 'Bareleven' 'Barfourteen'
mean 24.0 24.4 21.8
std. deviation 2.0 1.5 1.2

Cyme length (cm)

  'Bartwentynine' 'Bareleven' 'Barfourteen'
mean 13.6 17.0 16.0
std. deviation 2.0 2.0 3.0

Petal colour (RHS)

  'Bartwentynine' 'Bareleven' 'Barfourteen'
upper side 155D 62A 80A
lower side 155D 67B 74A
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