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Denomination: 'Argywhimi'
Trade name: Shere Mini White
Botanical Name: Argyranthemum frutescens
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Ánna M.W.P. Houbraken, Syngenta Seeds B.V., Enkhuizen, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-317-7511
Application Date: 2005-04-22
Application Number: 05-4767
Grant of Rights Date: 2007-06-08
Certificate Number: 2770
Date rights surrendered: 2010-07-15

Variety Description

Variety used for comparison: 'Sugar Baby'

Summary: 'Argywhimi' has a shorter plant height and narrower plant width than 'Sugar Baby'. 'Argywhimi' has dark blue green leaves while 'Sugar Baby' has medium green leaves. The ray florets of 'Argywhimi' have a smaller length to width ratio than the ray florets of 'Sugar Baby'.


PLANT: bushy rounded, compact growth habit, dense to very dense branching, early flowering, long flowering period

LEAF BLADE: base attenuate, apex obtuse with mucronate tip, dark blue green on upper side


FLOWER: semi-double, ray floret straight along longitudinal axis, outer ray florets white on upper and lower side, disc yellow orange before and after anther dehiscence.

Origin & Breeding History: 'Argywhimi' originated from an open pollinated cross conducted in the field in Enkhuizen, The Netherlands. The female parent was a proprietary seedling selection and the male parent was an unidentified selection of Argyranthemum frutescens. In September 1999 the resultant seeds were harvested and sown in a field trial in April 2000. 'Argywhimi' was selected as a single plant in August 2000, based on compact growth habit without the use of growth regulators, early flowering in the green house and continuous summer flowering.

Tests & Trials: 'Argywhimi' was tested during the spring of 2006 in St. Thomas, Ontario. The trial included 15 plants of each variety. All plants were grown from rooted cuttings transplanted into 15 cm pots on March 30, 2006. Observations and measurements were taken from 10 plants of each variety on May 26, 2006. All colour measurements were made using the 2001 RHS colour chart.

Comparison tables for 'Argywhimi' with reference variety 'Sugar Baby'

Plant height (cm)

  'Argywhimi' 'Sugar Baby'
mean 12.3 15.8
std. deviation 1.98 1.33

Plant width (cm)

  'Argywhimi' 'Sugar Baby'
mean 22.1 32.9
std. deviation 2.31 2.62

Leaf width (cm)

  'Argywhimi' 'Sugar Baby'
mean 2.5 1.8
std. deviation 0.46 0.37

Ray floret length to width ratio

  'Argywhimi' 'Sugar Baby'
length:width 2.5:1 4:1

Click on image for larger view
Argyranthemum: 'Argywhimi' (left) with reference variety 'Sugar Baby' (right)

Click on image for larger view
Argyranthemum: 'Argywhimi' (left) with reference variety 'Sugar Baby' (right)

Click on image for larger view
Argyranthemum: 'Argywhimi' (left) with reference variety 'Sugar Baby' (right)

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