Denomination: 'HBA724077'
Botanical Name: Hydrangea
Applicant/Holder: Hydrangea Breeders Association B.V.
Achterweg 58a
1424 PR
De Kwakel
Breeder: Niels Arts, Aalsmeer, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2004-06-16
Application Number: 04-4231
Grant of Rights Date: 2010-06-01
Certificate Number: 3858
Grant of Rights Termination Date: 2028-06-01

Variety Description

Variety used for comparison: 'Doris'

Summary: 'HBA724077' has stronger anthocyanin colouration of the stem and peduncle than 'Doris'. The upper side of the sepals of the large calyx is dark purple red for 'HBA724077' while it is purple red aging to blue pink for 'Doris'. Incisions of the sepal margins of the large calyx of 'HBA724077' are present on all sepals while for 'Doris' they are absent on all sepals. 'HBA724077' has longer sepals of the large calyx than 'Doris'.


PLANT: upright growth habit
STEM: strong anthocyanin colouration

LEAF BLADE: medium green on upper side, no variegation, medium glossiness on upper side, weak anthocyanin colouration along margin edge, ranges between elliptic and ovate shape, acuminate apex, acute base, no lobing, fine incisions of margin
PETIOLE: moderate anthocyanin colouration

INFLORESCENCE: flowers with small calyx are inconspicuous, dome shape
PEDUNCLE: very strong anthocyanin colouration
LARGE CALYX (STERILE FLOWER): very strong colour intensity, upper side is dark purple red (RHS 60A), four sepals per flower, strong overlapping of sepals, crenate incisions of margin present on all sepals

Origin & Breeding History: 'HBA724077' was developed by the breeder, Niels Arts, in Aalsmeer, The Netherlands. The objectives of his breeding program were to create new Hydrangea varieties with attractive flower colour and no requirement for vernalization. 'HBA724077' originated from a cross conducted in July 1999 between the female parent designated '98010' and the male parent designated '98003'. 'HBA724077' was selected by the breeder in March 2001 in Glandorf, Germany. Asexual reproduction by vegetative cuttings was first conducted in March 2003 in Glandorf, Germany.

Tests & Trials: Trials for 'HBA724077' were conducted in a polyhouse in spring 2009 at BioFlora Inc. in St. Thomas, Ontario. The trial included 10 plants of each variety. All plants were grown from cuttings rooted April 2008 and transplanted into 15 cm pots in May 2008. Observations and measurements were taken from 10 plants or parts of plants of each variety on May 20, 2009. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour charts.

Comparison tables for 'HBA724077' with reference variety 'Doris'

Colour of large calyx (RHS)

  'HBA724077' 'Doris'
upper side 60A darker and redder than 63A aging to 63B-C

Length of sepal of large calyx (cm)

  'HBA724077' 'Doris'
mean 3.3 2.7
std. deviation 0.26 0.27

Click on image for larger view
Hydrangea: 'HBA724077' (left) with reference variety 'Doris' (right)

Click on image for larger view
Hydrangea: 'HBA724077' (left) with reference variety 'Doris' (right)

Click on image for larger view
Hydrangea: 'HBA724077' (left) with reference variety 'Doris' (right)

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