Doughill

Hydrangea

Denomination: 'Doughill'
Trade name: Gatsby's Star
Botanical Name: Hydrangea quercifolia
Applicant/Holder: Spring Meadow Nursery, Inc.
12601 120th Avenue
Grand Haven, Michigan
49417
United States of America
Breeder: Doug Hill, Cleveland, United States of America
Brenda Hill, Cleveland, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2012-08-23
Application Number: 12-7708
Grant of Rights Date: 2016-08-26
Certificate Number: 5305
Grant of Rights Termination Date: 2036-08-26

Variety Description

Variety used for comparison: 'Snowflake'

Summary: The calyx of the sterile flower of 'Doughill' is smaller in diameter than the calyx of 'Snowflake'. The sepal of the sterile flower of 'Doughill' is shorter than the sepal of 'Snowflake'. The number of sepals per sterile flower is many for 'Doughill' whereas the sepals per sterile flower are medium in number for 'Snowflake'. The degree of overlapping of the sepals of the sterile flower is strong for 'Doughill' whereas the overlapping is of medium degree for the sepals of 'Snowflake'. When newly open, the inner side of the sepal of the sterile flower is yellow green for 'Doughill' whereas the sepal of 'Snowflake' is lighter yellow green. When fully open, the inner side of the sepal of the sterile flower is yellow green for 'Doughill' whereas the sepal is white for 'Snowflake' with the exception of the sepals located at the centre of the flower which are yellow green.

Description:

PLANT: non-climbing type, upright to spreading growth habit, begins flowering early to mid-season
STEM: no fasciation, brownish, many lenticels, light brown lenticels

LEAF BLADE: lobing present, short tip, shallow incisions of margin, no variegation, medium green upper side, absent or weak degree of glossiness, weak blistering between veins

INFLORESCENCE: conical shape, moderately conspicuous fertile flowers
STERILE FLOWER: double type, many sepals, strong degree of overlapping of sepals, incisions of margin are absent on all sepals
SEPAL OF STERILE FLOWER (INNER SIDE): yellow green (RHS 150B-C) when newly open, yellow green (RHS 150D) when fully open, no secondary colour

Origin & Breeding History: 'Doughill' was discovered and developed by the breeders, Doug Hill and Brenda Hill, in Cleveland, Alabama, USA. It originated from an open pollinated cross that occurred in 1988 between Hydrangea quercifolia, as the female parent, and an unknown male parent. 'Doughill' was selected in 1990 for its plant health, abundant sterile flowers, a full inflorescence, and unique sterile flower form. Asexual reproduction of 'Doughill' by softwood cuttings was first conducted in July 2004 in Cleveland, Alabama, USA.

Tests & Trials: The comparative trial for 'Doughill' was conducted in a polyhouse during the spring of 2015 at BioFlora Inc. in St. Thomas, Ontario. The trial included a total of 10 shrubs each of the candidate and reference variety. All shrubs were grown from rooted cuttings and transplanted into 13.2 litre containers on June 19, 2013. Observations and measurements were taken from 10 plants or parts of plants of each variety on June 11, 2015. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'Doughill' with reference variety 'Snowflake'

Diameter of calyx of sterile flower (cm)

  'Doughill' 'Snowflake'
mean 3.2 4.4
std. deviation 0.14 0.22

Length of sepal of sterile flower (cm)

  'Doughill' 'Snowflake'
mean 1.9 2.3
std. deviation 0.09 0.10

Colour of inner side of sepal of sterile flower (RHS)

  'Doughill' 'Snowflake'
newly open 150B-C 1C-D
fully open 150D 155C, but 1C on sepals at centre of flower

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

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

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