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Denomination: 'Chewperadventure'
Trade name: Oso Easy Mango Salsa
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: 2010-08-12
Application Number: 10-7056
Grant of Rights Date: 2013-12-23
Certificate Number: 4688
Grant of Rights Termination Date: 2031-12-23

Variety Description

Variety used for comparison: 'Hormeteoric' (Oso Easy Strawberry Crush)

Summary: 'Chewperadventure' has shorter leaves and more flowers per lateral flowering shoot than 'Hormeteoric'. The flowers of 'Chewperadventure' are smaller in diameter with smaller petals than those of 'Hormeteoric'. The main colour on the inner side of the petal of 'Chewperadventure' is orange red with red pink aging to lighter red pink whereas it is red pink aging to lighter red pink for 'Hormeteoric'. The basal spot on the inner side of the petal is small to medium size and white for 'Chewperadventure' whereas it is large to very large and medium yellow for 'Hormeteoric'.


PLANT: compact landscape shrub type, mounding to moderately spreading growth habit
YOUNG SHOOT: medium to strong intensity of anthocyanin colouration, medium number of prickles
PRICKLE: predominantly reddish

LEAF: light to medium green on upper side, anthocyanin colouration present at margin edge, medium glossiness on upper side
TERMINAL LEAFLET: absent or very weak undulation of margin, medium elliptic, obtuse base, acuminate apex

FLOWERING SHOOT: medium number of flowering laterals, medium to many flowers per lateral
SEPAL: weak extensions
FLOWER BUD: medium ovate in longitudinal section
FLOWER: semi-double type, red blend colour group, pink centre, medium density of petals, irregularly rounded when viewed from above, profile of upper part is flattened convex, profile of lower part is concave, medium fragrance, reflexing of petals one by one is absent
PETAL: obovate, absent or very weak incisions, absent or very weak reflexing of margin, weak undulation, one colour on inner side, intensity of colour on inner side is even, main colour on inner side is orange red (RHS 41B) with red pink (RHS 52B) aging to red pink (RHS 52C) and orange red (RHS 41C), basal spot on inner side is small to medium size and white, main colour on outer side is red pink (RHS 52C)
OUTER STAMEN: filament is predominantly medium yellow

Origin & Breeding History: 'Chewperadventure' was bred and developed by the breeder in Newport, Shropshire, United Kingdom. It originated from a controlled cross conducted in 1995 between the variety 'Pathfinder' as the female parent and a proprietary seedling as the male parent. 'Chewperadventure' was selected based on its attractive orange pink flowers, profuse foliage, spreading plant growth habit, few thorns, and good repeat flowering. Asexual reproduction of 'Chewperadventure' was fist conducted in 1998.

Tests & Trials: The PBR trial for 'Chewperadventure' was conducted as part of an outdoor field trial during the summer of 2012 at BioFlora Inc. in St. Thomas, Ontario. It included 10 plants each of the candidate and reference varieties. Plants were grown from rooted cuttings, planted into 9 litre containers in July 2011, and transplanted to an outdoor trial bed in the fall of 2011. Observations and measurements were taken from 10 plants or parts of plants of each variety on July 27, 2012. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) colour charts.

Comparison tables for 'Chewperadventure' with reference variety 'Hormeteoric'

Leaf length (cm)

  'Chewperadventure' 'Hormeteoric'
mean 7.2 9.1
std. deviation 0.58 0.61

Flower diameter (cm)

  'Chewperadventure' 'Hormeteoric'
mean 4.3 5.2
std. deviation 0.27 0.18

Petal length (cm)

  'Chewperadventure' 'Hormeteoric'
mean 1.9 2.4
std. deviation 0.26 0.11

Petal width (cm)

  'Chewperadventure' 'Hormeteoric'
mean 1.7 2.2
std. deviation 0.12 0.16

Main colour of petal (RHS)

  'Chewperadventure' 'Hormeteoric'
inner side 41B with 52B, aging to 52C, 41C 52B-C aging to 52D
outer side 52C closest to 11D

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

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

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

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