SMHMLDD

Hydrangea

Denomination: 'SMHMLDD'
Trade name: Let's Dance Diva
Botanical Name: Hydrangea macrophylla
Applicant/Holder: Spring Meadow Nursery, Inc.
12601 120th Avenue
Grand Haven, Michigan
49417
United States of America
Breeder: Timothy D. Wood, Spring Lake, 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: 12-7704
Grant of Rights Date: 2015-10-13
Certificate Number: 5127
Grant of Rights Termination Date: 2035-10-13

Variety Description

Varieties used for comparison: 'MAK20' (Tuff Stuff) and 'Lynn' (Let's Dance Starlight)

Summary: The plants of 'SMHMLDD' are shorter than the plants of 'Lynn'. The leaf blade of 'SMHMLDD' is longer than the leaf blade of both reference varieties and broader than the leaf blade of 'Lynn'. The inflorescence of 'SMHMLDD' is taller and larger in diameter than the inflorescence of both reference varieties. The calyx of the sterile flower of 'SMHMLDD' is larger in diameter than the calyx of both reference varieties. The sterile flower of 'SMHMLDD' is single type whereas the sterile flower of 'MAK20' is predominantly single type with some semi-double type. The degree of overlapping of the sepals of the sterile flower is weak to medium for 'SMHMLDD' while the overlapping of the sepals of 'MAK20' is strong. When the sterile flower is newly open, the colour on the inner side of the sepal is blue pink to light blue pink with yellow green at the base for 'SMHMLDD' whereas the inner side of the sepal is purple red and blue pink with light green at the base for 'MAK20' and blue pink with light blue violet at the base for 'Lynn'. When the sterile flower is fully open, the colour on the inner side of the sepal is light blue pink with blue pink to light blue pink tones for 'SMHMLDD' whereas the inner side of the sepal is blue pink for 'MAK20' and lighter blue pink for 'Lynn'.

Description:

PLANT: non-climbing type, upright to semi-upright growth habit
STEM: no fasciation, brownish, white lenticels

LEAF BLADE: no lobing, elliptic shape, medium to long tip, cuneate base, medium depth of incisions of margin, no variegation, medium green on upper side, medium intensity of glossiness on upper side, medium strength of blistering

INFLORESCENCE: flattened shape, very conspicuous fertile flowers, arrangement of sterile flowers predominantly in two or more whorls
STERILE FLOWER: single type, weak to medium degree of overlapping of sepals
STERILE FLOWER SEPAL: incisions of margin sometimes present, inner side is blue pink to light blue pink (RHS 73B-C) with yellow green (RHS 1C-D) at base when flower is newly open, inner side is light blue pink (RHS 69B) with blue pink to light blue pink (RHS 73B-C) tones when flower is fully open, no secondary colour on inner side
FERTILE FLOWER: medium pink on inner side of petal

Origin & Breeding History: 'SMHMLDD' was bred and developed by the breeder, Timothy D. Wood, of Spring Meadow Nursery, Inc. in Grand Haven, Michigan, USA. It originated from an open pollinated cross that occurred in 2007 between the variety 'Lynn' as the female parent and the variety 'ES5' as the male parent. 'SMHMLDD' was selected in 2009 for its reblooming habit, very large inflorescence size, large sepal size, and sepal colour. Asexual reproduction of 'SMHMLDD' by softwood cuttings was first conducted in July 2009, in Grand Haven, Michigan, USA.

Tests & Trials: The comparative trial of 'SMHMLDD' was conducted in a polyhouse during the spring of 2014 at BioFlora Inc. in St. Thomas, Ontario. It included a total of 10 shrubs each of the candidate and reference varieties. All shrubs were grown from rooted cuttings and transplanted into 13.5 litre containers on June 19, 2014. Observations and measurements were taken from 10 shrubs or parts of shrubs of the candidate variety on June 20, 2014, except for the flower characteristics which were taken on June 12, 2014. Observations and measurements were taken from 10 shrubs or parts of shrubs of the reference varieties on June 9, 2014. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'SMHMLDD' with reference varieties 'MAK20' and 'Lynn'

Natural plant height (cm)

  'SMHMLDD' 'MAK20' 'Lynn'
mean 45.7 45.4 70.1
std. deviation 4.58 4.76 4.91

Leaf blade length (cm)

  'SMHMLDD' 'MAK20' 'Lynn'
mean 16.0 11.7 11.2
std. deviation 1.28 0.83 0.79

Leaf blade width (cm)

  'SMHMLDD' 'MAK20' 'Lynn'
mean 10.0 8.1 6.9
std. deviation 1.13 0.42 1.03

Inflorescence height (cm)

  'SMHMLDD' 'MAK20' 'Lynn'
mean 6.2 3.4 3.6
std. deviation 0.69 0.70 0.56

Inflorescence diameter (cm)

  'SMHMLDD' 'MAK20' 'Lynn'
mean 22.3 15.7 13.5
std. deviation 1.42 1.30 1.77

Diameter of calyx of sterile flower (mm)

  'SMHMLDD' 'MAK20' 'Lynn'
mean 8.5 5.0 4.1
std. deviation 0.87 0.55 0.32

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

  'SMHMLDD' 'MAK20' 'Lynn'
newly open 73B-C with 1C-D at base N66B/67C with 145B-C at base N66D with 69D and whiter than 69D at base
fully open 69B with 73B-C tones N66C-D N66D

Click on image for larger view
SMHMLDD
Hydrangea: 'SMHMLDD' (left) with reference varieties 'MAK20' (centre) and 'Lynn' (right)

Click on image for larger view
SMHMLDD
Hydrangea: 'SMHMLDD' (left) with reference varieties 'MAK20' (centre) and 'Lynn' (right)

Click on image for larger view
SMHMLDD
Hydrangea: 'SMHMLDD' (left) with reference varieties 'MAK20' (centre) and 'Lynn' (right)

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