Zlepolthree

Rose

Denomination:	'Zlepolthree'
Trade name:	Pretty Polly Lavender
Botanical Name:	Rosa
Applicant/Holder:	The Conard-Pyle Company 8 Federal Road, Suit 6 West Grove, Pennsylvania 19390 United States of America
Breeder:	David Zlesak, St. Paul, United States of America
Agent in Canada:	BioFlora Inc. 38723 Fingal Line R.R. #1 St. Thomas, Ontario N5P 3S5 Canada Tel: 519-317-7511
Application Date:	2019-05-17
Provisional Protection::	2019-05-17
Application Number:	19-9896
Grant of Rights Date:	2022-02-11
Certificate Number:	6556
Grant of Rights Termination Date:	2042-02-11

Variety Description

Varieties used for comparison: 'The Fairy' and 'Zlepolone' (Pretty Polly Pink)

Summary: During the second flush, the plants of 'Zlepolthree' are taller than those of 'Zlepolone'. The terminal leaf of 'Zlepolthree' is larger than that of 'The Fairy'. The glossiness of the upper side of the leaf of 'Zlepolthree' is absent or very weak while it is medium to strong for that of 'The Fairy' and weak for that of 'Zlepolone'. The flower of 'Zlepolthree' has a greater number of petals than the flower of both reference varieties. The flower diameter and petal of 'Zlepolthree' are smaller than that of 'The Fairy'. When fully opened, the inner side of the petal of 'Zlepolthree' is blue pink changing to violet with light blue violet and white towards the base with age while the inner side of the petal of 'The Fairy' is light blue pink and that of 'Zlepolone' is purple to blue pink changing to purple red with age. The outer side of the petal of 'Zlepolthree' is light blue violet while the outer side of the petal of 'The Fairy' is blue pink to light blue pink and that of 'Zlepolone' is purple red.

Description:

PLANT: shrub type, semi-upright growth habit, weak intensity of anthocyanin colouration on upper third of young shoot only, few yellowish prickles on stem

YOUNG LEAFLET: absent or very weak intensity of anthocyanin colouration
LEAF: medium sized, upper side light to medium green, no anthocyanin colouration, absent or very weak glossiness of upper side, absent or very weak to weak undulation of margin
TERMINAL LEAFLET: ovate shape, obtuse to rounded base, acute apex

FLOWERING SHOOT: few to medium number of flowering laterals, medium to many flowers per lateral
FLOWER BUD: medium ovate
FLOWER: double type, violet blend colour group, medium density of petals, round shape, flat to flattened convex profile of upper part, flattened convex profile of lower part, absent or weak to medium fragrance, medium sepal extensions
PETAL: no reflexing of petals one-by-one, obovate shape, no incisions, weak reflexing of margin, weak undulation, one colour on inner side (basal spot excluded), when fully opened main colour blue pink (lighter than RHS N74D), when aged main colour violet (RHS 75B) fading to light blue violet (RHS 76D) and white (RHS NN155D) towards base, outer side light blue violet (RHS 75B)
BASAL PETAL SPOT (INNER SIDE): small to medium sized, white
OUTER STAMEN: predominantly light yellow filament

Origin & Breeding History: The variety 'Zlepolthree' originated from a controlled cross conducted by the breeder, David Zlesak, of River Falls, Wisconsin, USA. The cross was made in June 1998 in Rhinelander, Wisconsin, USA between two unnamed proprietary parents. From the resulting progeny, the new variety was selected as a single plant based on its compact plant growth habit, foliage, double purple-pink coloured flowers and disease resistance. Asexual reproduction of 'Zlepolthree' was first conducted by vegetative cuttings in West Grove, Pennsylvania, USA.

Tests & Trials: The comparative trial for 'Zlepolthree' was conducted outdoors during the summer of 2020 in St. Thomas, Ontario. The trial included 9 plants each of the candidate variety and 'Zlepolone' and 10 plants of 'The Fairy'. All plants were grown from bare-rooted cuttings and transplanted into 13.6 litre containers in June 2020. Observations and measurements were taken from 10 plants, or 10 parts of plants, of each variety on July 23, 2020. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Zlepolthree' with reference varieties 'The Fairy' and 'Zlepolone'

Plant height during second flush (cm)

	'Zlepolthree'	'The Fairy'	'Zlepolone'
mean	35.4	35.2	31.0
std. deviation	3.71	3.95	6.03

Terminal leaf length (cm)

	'Zlepolthree'	'The Fairy'	'Zlepolone'
mean	3.9	2.5	3.7
std. deviation	0.58	0.26	0.34

Terminal leaf width (cm)

	'Zlepolthree'	'The Fairy'	'Zlepolone'
mean	2.3	1.6	2.0
std. deviation	0.33	0.24	0.14

Petals per flower (number)

	'Zlepolthree'	'The Fairy'	'Zlepolone'
mean	45	29	26
std. deviation	5.40	4.94	3.51

Flower diameter (cm)

	'Zlepolthree'	'The Fairy'	'Zlepolone'
mean	2.5	3.5	2.4
std. deviation	0.22	0.17	0.24

Petal length (cm)

	'Zlepolthree'	'The Fairy'	'Zlepolone'
mean	1.3	1.7	1.1
std. deviation	0.10	0.08	0.05

Petal width (cm)

	'Zlepolthree'	'The Fairy'	'Zlepolone'
mean	0.8	1.6	1.1
std. deviation	0.07	0.04	0.07

Main colour of petal (RHS)

	'Zlepolthree'	'The Fairy'	'Zlepolone'
inner side- fully opened	lighter than N74D	62B-C	67A-B
inner side- aged	75B fading to 76D and NN155D at base	N/A	N57C-D
outer side	75B	62A-B	N57C-D