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Denomination: 'Chewground'
Trade name: Oso Easy Fragrant Spreader
Botanical Name: Rosa
Applicant/Holder: Spring Meadow Nursery, Inc.
12601 120th Avenue
Grand Haven, Michigan
United States of America
Breeder: Christopher Hugh Warner, Newport, Shropshire, United Kingdom
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-317-7511
Application Date: 2004-06-22
Application Number: 04-4265
Grant of Rights Date: 2008-11-21
Certificate Number: 3400
Date rights surrendered: 2015-11-03

Variety Description

Variety used for comparison: 'Noatraum' (Flower Carpet Pink)

Summary: 'Chewground' has nine leaflets per leaf while 'Noatraum' has five to seven leaflets per leaf. The shape of the flower bud in longitudinal section is pointed for 'Chewground' while it is ovoid for 'Noatraum'. The flowers of 'Chewground' are single type while those of 'Noatraum' are double. The upper side of the petal of 'Chewground' is blue pink with a purple red to blue pink margin and white base while that of 'Noatraum' is purple red with a white base and yellow petal basal spot.


PLANT: ground cover type
YOUNG SHOOT: medium intensity of purple red anthocyanin colouration
PRICKLES/THORNS: concave, sparse to average number of short prickles, average number of long prickles, purple red

ENTIRE LEAF: medium green, strong to very strong glossiness of upper side, nine leaflets
TERMINAL LEAFLET: serrate margin, thin to leathery texture, cuneate to obtuse base

FLOWERING PERIOD: almost continuous
PEDICEL: medium number of prickles
FLOWER BUD: pointed in longitudinal section, purple red
FLOWER: low to medium number per flowering shoot, irregularly rounded when fully open and viewed from above, flat upper part when viewed from the side, flat to concave lower part when viewed from the side, normal centre, single type, overall colour is red purple
PETAL: upper side is blue pink with purple red to blue pink margin and white base, lower side is blue pink with a white base, medium sized basal spot on upper and lower sides, weak reflexing of margin, weak undulation of margin
REPRODUCTIVE ORGANS: filament on outer stamens is yellow, style is medium in length and yellow green, hairiness of upper half of style is absent to very sparse, stigma and anthers at same level, very small receptacle, receptacle in longitudinal section is pitcher shaped, prickles present on receptacle

Origin & Breeding History: 'Chewground' was developed by the breeder, Christopher Hugh Warner, in Greenfields, Brockton, Newport, Shropshire, United Kingdom. It originated from a cross made in 1994 between Rose variety 'Grouse' as the female parent and Rose variety 'Yesterday' as the male parent. 'Chewground' was selected from the progeny in 1995 based on its flower colour, plant growth habit and plant vigour.

Tests & Trials: Trials for 'Chewground' were conducted in the field during the summer of 2007 at BioFlora Inc. in St. Thomas, Ontario. There were eight (8) plants per variety. Rooted plants were transplanted to the field in May 2007. The plants were spaced 0.6 meters apart in rows which were 0.9 meters apart. All observations and measurements were taken on September 23, 2007. All colour determinations were made using the 2001 Royal Horticulture Society (RHS) Colour Chart.

Comparison tables for 'Chewground' with reference variety 'Noatraum'

Colour of upper side of petal (RHS)

  'Chewground' 'Noatraum'
margin N66B-C 58B
middle N66D 58B with N57A tones
base white, 155A 155D with 3C spot at base

Colour of lower side of petal (RHS)

  'Chewground' 'Noatraum'
margin N66C close to N57B
middle N66D 58B
base white, N155A 155B with 3C spot at base

Click on image for larger view
Rose: 'Chewground' (left) with reference variety 'Noatraum' (right)

Click on image for larger view
Rose: 'Chewground' (left) with reference variety 'Noatraum' (right)

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