Couriphy01

Ninebark

Variety Description

Variety used for comparison: 'Jefam' (Amber Jubilee)

Summary: The petiole of 'Couriphy01' has a very strong intensity of anthocyanin colouration on the upper side and a medium to strong intensity of anthocyanin colouration on the lower side whereas the petiole of 'Jefam' has a medium to strong intensity of anthocyanin colouration on the upper side and a weak to medium intensity of anthocyanin colouration on the lower side. The leaf of 'Couriphy01' is narrower than the leaf of 'Jefam'. The main colour of the upper side of themature leaf of 'Couriphy01' is dark green whereas the main colour of the upper side of the mature leaf of 'Jefam' is light to medium green. The midrib on the lower side of the leaf on 'Couriphy01' has a medium to strong intensity of anthocyanin colouration whereas the midrib on the lower side of the leaf on 'Jefam' has an absent to weak intensity of anthocyanin colouration. 'Couriphy01' has a shorter petiole than 'Jefam'.

Description:

PLANT: deciduous, semi-upright growth habit, medium to dense foliage

BRANCH: many, erect to semi-erect attitude, medium to rigid stiffness, dark brown bark
BRANCHLET: red purple (RHS 183A), strong intensity of anthocyanin colouration

LEAF: alternate arrangement along stem
PETIOLE: present, very strong intensity of anthocyanin colouration on upper side, medium to strong intensity of anthocyanin colouration on lower side
LEAF BLADE: ovate, acute apex, rounded base, serrate and crenate margin, strong degree of folding of newly opened leaf, medium depth lobing
LEAF BLADE (UPPER SIDE): absent to weak glossiness, absent to very weak prominence of midrib, emerges as medium brown (RHS 176A) transitioning to dark green then dark brown (RHS 200A)
LEAF BLADE (LOWER SIDE): strong prominence of midrib, brown green (RHS 147B-C) in summer at maturity, medium to strong intensity of anthocyanin colouration of midrib

INFLORESCENCE: corymb formation
FLOWER: rotate shape
COROLLA: white (RHS NN155D) with pink blush on upper side and white (RHS NN155D) on lower side

SEED POD: brown purple (RHS 184B)

Origin & Breeding History: 'Couriphy01' originated from an open-pollinated cross between the variety 'Diablo' and the variety 'Monlo' in 2005 in Moyenmoutier, France. It was selected in August 2006 based on whitish pink flowers, dark green coloured mature foliage that turns into dark burgundy in full sun, vigour, and upright-rounded growth habit. Asexual propagation since July 2010 has been done through softwood and hardwood cuttings.

Tests & Trials: The comparative trial of 'Couriphy01' was conducted in an outdoor irrigated container trial during the spring and summer of 2018, at BioFlora Inc., in St. Thomas, Ontario. The trial included a total of 10 plants each of the candidate and reference variety. All plants were grown from 5.7 cm liners, planted into 9 litre containers in spring of 2017. The plants were overwintered in an un-heated polyhouse. The observations and measurements were taken from 10 plants, or parts of plants, of each variety during the summer of 2018. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.

Comparison tables for 'Couriphy01' with reference variety 'Jefam'

Petiole length (cm)

Leaf width (cm)

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Ninebark: 'Couriphy01' (left) with reference variety 'Jefam' (right)

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Ninebark: 'Couriphy01' (left) with reference variety 'Jefam' (right)

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Ninebark: 'Couriphy01' (left) with reference variety 'Jefam' (right)