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Denomination: 'Balclinebu'
Trade name: Cloud Nine Blue
Botanical Name: Ageratum houstonianum
Applicant/Holder: Ball Horticultural Company
622 Town Road
West Chicago, Illinois
United States of America
Breeder: Ball Horticultural Company, West Chicago, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-317-7511
Application Date: 2005-02-18
Application Number: 05-4575
Date Withdrawn: 2007-07-05

Variety Description

Varieties used for comparison: 'Agsantis' and 'Blue Horizon'

Summary: 'Balclinebu' differs from 'Agsantis' and 'Blue Horizon' mainly in growth habit, plant height, leaf blade length and width, disc floret length and colour before dehiscence. The plants of 'Balclinebu' are upright-bushy in growth habit whereas the plants of 'Agsantis' are bushy-rounded. The plants of 'Balclinebu' are taller than those of 'Agsantis' and shorter than those of 'Blue Horizon'. The leaf blades of 'Balclinebu' are longer and wider than both 'Agsantis' and 'Blue Horizon'. The disc florets of 'Balclinebu' are shorter than those in both 'Agsantis' and 'Blue Horizon'. Before dehiscence, the disc florets of 'Balclinebu' are violet whereas they are more violet blue in 'Agsantis'.


PLANT: annual, upright-bushy growth habit, medium degree of branching
STEM: light green, medium anthocyanin at internodes, dense long pubescence, medium thickness

LEAF: simple, cordate-deltoid shape, cuspidate-rounded apex, cordate-truncate base, crenate margins with cuspidate tips, medium blistering, medium pubescence on upper and lower surfaces, medium green on upper surface, no variegation, petiole present

FLOWER: inflorescence (umbel), no anthocyanin on pedicel
DISC FLORETS: blue violet

Origin & Breeding History: 'Balclinebu' originated from a cross made in August 2002, in Guadalupe, California, USA between the female parent, '92-122-4', and the male parent, '02-159-2'. In June 2003, one plant was selected from the resultant progeny for early and free flowering and vigourous growth habit.

Tests & Trials: The tests and trials for 'Balclinebu' were conducted in a polyhouse at BioFlora Inc. in St. Thomas, Ontario during the spring of 2006. The trials included 15 plants of each variety. Rooted cuttings were transplanted into 15 cm pots on April 13, 2006. Observations and measurements were taken from 10 plants of each variety. All colour measurements were made using the RHS colour chart 2001.

Comparison tables for 'Balclinebu' with reference varieties 'Agsantis' and 'Blue Horizon'

Plant height (cm)

  'Balclinebu' 'Agsantis' 'Blue Horizon'
mean 30.7 42.4 18.6
std. deviation 3.55 5.69 0.60

Leaf blade length (cm)

  'Balclinebu' 'Agsantis' 'Blue Horizon'
mean 7.0 4.7 4.3
std. deviation 0.60 0.38 0.16

Leaf blade width (cm)

  'Balclinebu' 'Agsantis' 'Blue Horizon'
mean 7.5 5.1 4.3
std. deviation 0.56 0.49 0.29

Petiole length (mm)

  'Balclinebu' 'Agsantis' 'Blue Horizon'
mean 23.5 18.9 20.4
std. deviation 3.89 2.96 2.76

Flower bud diameter (mm)

  'Balclinebu' 'Agsantis' 'Blue Horizon'
mean 7.0 7.3 6.3
std. deviation 0.82 0.48 0.67

Flower diameter after dehiscence (cm)

  'Balclinebu' 'Agsantis' 'Blue Horizon'
mean 1.7 1.8 1.7
std. deviation 0.16 0.19 0.11

Disc floret length after dehiscence (mm)

  'Balclinebu' 'Agsantis' 'Blue Horizon'
mean 5.3 9.5 6.2
std. deviation 0.82 0.97 1.14

Main colour of disc florets (RHS)

  'Balclinebu' 'Agsantis' 'Blue Horizon'
before flowering (at bud stage) 90C, middle spot 60B 90C N87A
after dehiscence 92A-B 92B 92A

Click on image for larger view
Ageratum: 'Balclinebu' (left) with reference varieties 'Agsantis' (centre) and 'Blue Horizon' (right)

Click on image for larger view
Ageratum: 'Balclinebu' (left) with reference varieties 'Agsantis' (centre) and 'Blue Horizon' (right)

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