Denomination: 'Heliobu'
Trade name: Scentropia Dark Blue
Botanical Name: Heliotropium arborescens
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Ánna M.W.P. Houbraken, Syngenta Seeds B.V., Enkhuizen, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2006-11-20
Application Number: 07-6043
Grant of Rights Date: 2009-09-23
Certificate Number: 3618
Grant of Rights Termination Date: 2027-09-23

Variety Description

Variety used for comparison: 'Nagano'

Summary: 'Heliobu' has a taller and wider plant than 'Nagano'. 'Heliobu' has a bushy-rounded growth habit while 'Nagano' has an upright-bushy growth habit. 'Heliobu' has weak anthocyanin colouration on the peduncle while 'Nagano' has medium to strong anthocyanin. 'Heliobu' has a slightly different colour on the lower side of the corolla than 'Nagano'.


PLANT: bushy-rounded growth habit, medium degree of branching
STEM: medium green, no anthocyanin colouration, medium pubescence, medium thickness, smooth

LEAF: alternate arrangement, simple, ovate, acute apex, cuneate base, entire margin, medium pubescence on upper and lower side, medium green on upper and lower side

PEDUNCLE: weak anthocyanin colouration, medium pubescence

INFLORESCENCE: cyme, terminal position, erect to semi-erect, medium to dense
COROLLA LOBES: 5, petals partially fused, medium size, salverform, weak undulation of margin, absent to very weak recurvature of margin, sparse pubescence on throat, violet on upper side with white at base, throat orange brown, violet on lower side

Origin & Breeding History: 'Heliobu' originated from an open pollination that took place in August 2002 in Enkhuizen, The Netherlands. The female parent was identified as B0473-1 and the pollen came from unidentified Heliotropium arborescens plants. The new variety was selected as a single seedling in August 2003, based on criteria for branching habit, semi-compact growth habit, large flower size and heat tolerance. Asexual reproduction by cuttings was first conducted in August 2003 in Enkhuizen, The Netherlands.

Tests & Trials: Trials for 'Heliobu' were conducted during the summer of 2008 in a polyhouse at BioFlora Inc. in St. Thomas, Ontario. There were 15 plants each of the candidate and reference variety. The plants were grown from rooted cuttings which were transplanted into 15 cm pots on April 30, 2008. Observations and measurements were taken from 10 plants on June 16, 2008. All colour determinations were made using the 2001 Royal Horticulture Society (RHS) Colour Chart.

Comparison tables for 'Heliobu' with reference variety 'Nagano'

Plant height (cm)

  'Heliobu' 'Nagano'
mean 24.9 20.5
std. deviation 1.37 1.58

Plant width (cm)

  'Heliobu' 'Nagano'
mean 36.4 27.9
std. deviation 1.65 2.38

Colour of corolla (RHS)

  'Heliobu' 'Nagano'
upper side N87A, N82A in veins along margin N87A
lower side N82C N87B-C
throat 173B 144A

Click on image for larger view
Heliotrope: 'Heliobu' (left) with reference variety 'Nagano' (right)

Click on image for larger view
Heliotrope: 'Heliobu' (left) with reference variety 'Nagano' (right)

Click on image for larger view
Heliotrope: 'Heliobu' (left) with reference variety 'Nagano' (right)

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