|Botanical Name:||Hydrangea macrophylla|
Spring Meadow Nursery, Inc.
12601 120th Avenue
Grand Haven, Michigan
United States of America
Timothy D. Wood, Spring Lake, United States of America
|Agent in Canada:||
38723 Fingal Line
St. Thomas, Ontario
|Grant of Rights Date:||2015-10-22|
|Date rights surrendered:||2017-10-22|
Variety used for comparison: 'Double Delight Perfection'
Summary: The sepal of the sterile flower of 'SMHMP1' has an obtuse shaped apex while the sepal of 'Double Delight Perfection' has an acute shaped apex with a blunt tip. In cross-section, the profile of the outer sepal of the sterile flower is flat for 'SMHMP1' while the profile is concave or V-shaped for 'Double Delight Perfection'. When the sterile flower is newly open, the colour of the inner side of the sepal of 'SMHMP1' is blue pink with yellow green at the base while the inner side of the sepal of 'Double Delight Perfection' is light red pink with light yellow at the base.
PLANT: non-climbing type, upright growth habit
STEM: no fasciation, green, white lenticels
LEAF BLADE: no lobing, elliptic shape with some obovate, medium length of tip, obtuse base, shallow to 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: globular shape, inconspicuous fertile flowers
STERILE FLOWER: double type, very strong degree of overlapping of sepals
STERILE FLOWER SEPAL: obtuse apex, flat profile of outer sepals in cross-section, incisions of margin sometimes present, inner side is blue pink (RHS 63B) with yellow green (RHS 2D) at base when flower is newly open, inner side is blue pink (RHS 65A) when flower is fully open, no secondary colour on inner side
FERTILE FLOWER: medium number, pink on inner side of petal
Origin & Breeding History: 'SMHMP1' 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 during the summer of 2007 between the variety 'Harbits' as the female parent, and an unknown male parent. 'SMHMP1' was selected during the summer of 2009 for its attractive glossy foliage, inflorescence type, double type calyx, stem strength, and production characteristics. Asexual reproduction of 'SMHMP1' by softwood cuttings was first conducted in July 2009, in Grand Haven, Michigan, USA.
Tests & Trials: The comparative trial of 'SMHMP1' was conducted in a polyhouse during the spring of 2014 at BioFlora Inc. in St. Thomas, Ontario. It included a total of 8 shrubs each of the candidate and reference variety. All shrubs were grown from rooted cuttings and transplanted into 13.5 litre containers on June 19, 2013. Observations and measurements were taken from 10 shrubs or parts of shrubs of each variety on June 9, 2014. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.
Comparison table for 'SMHMP1' with reference variety 'Double Delight Perfection'
Colour of sepal of sterile flower (RHS)
|'SMHMP1'||'Double Delight Perfection'|
|newly open||63B with 2D at base||38D with 4D at base|
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