Denomination: 'Bartwelve'
Trade name: Pink Flame
Botanical Name: Phlox paniculata
Applicant/Holder: Dummen Group B.V.
P.O. Box 26
Coldenhovelaan 6, 2678 PS
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
V2Z 2M4
Tel: 604-514-1799
Application Date: 1999-11-25
Application Number: 99-1867
Grant of Rights Date: 2001-11-23
Certificate Number: 1094
Date rights surrendered: 2017-11-23

Variety Description

Variety used for comparison: 'Amethyst'

Summary: 'Bartwelve' is a perennial phlox variety which has shorter, bushier plants than 'Amethyst'. The cyme of 'Bartwelve' is a more rounded or domed pyramid than the cyme of the reference. 'Bartwelve' has deeper pink florets with a dark pink eye zone, whereas 'Amethyst' has pale pink florets with a white eye zone.


'Bartwelve' is a diploid, perennial phlox variety with a bushy, rounded growth habit. The leaves are dark green, lanceolate in shape, with no pubescence on either the upper or lower side and no glandular stickiness. 'Bartwelve' flowers mid-season and the flower cymes are single and dome to pyramid shaped. The florets are round and pink with a deep pink eye zone.

Origin & Breeding History: 'Bartwelve' originated as a seedling selection from a cross between two breeding lines made in Aalsmeer, the Netherlands in 1995. The selection criteria was compact, dwarf growth habit.

Tests & Trials: Tests and trials for 'Bartwelve' were conducted in the summer of 2000 at Genesis Plant Propagation Ltd., Langley, British Columbia. The trials consisted of 12 plants per variety, grown in 25 cm pots. They were planted April 15th and pinched May 15th. The plants were grown in a cold frame until June 15th and then were placed outdoors. No spray application was applied.

Comparison tables for 'Bartwelve' with reference variety 'Amethyst'

Plant height (cm)

  'Bartwelve' 'Amethyst'
mean 35.0 71.5
range 29-41 60-79

Plant width (cm)

  'Bartwelve' 'Amethyst'
mean 35.0 56.0
range 30-40 52-60

Leaf length (cm)

  'Bartwelve' 'Amethyst'
mean 9.0 14.0
range 8.5-9.5 13.5-15.0

Leaf width (cm)

  'Bartwelve' 'Amethyst'
mean 3.5 5.3
range 3-4 5-5.5

Flower cyme length (cm)

  'Bartwelve' 'Amethyst'
mean 15.0 18.5
range 12.5-17.5 16-23

Colour of upper side of petal (RHS)

  'Bartwelve' 'Amethyst'
apical zone 78A 87C
basal zone 67B 155D
marking 67B 155D

Colour of lower side of petal (RHS)

  'Bartwelve' 'Amethyst'
apical zone 78C 87C
basal zone 78C 87C
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