Cobwhite

Argyranthemum

Denomination: 'Cobwhite'
Trade name: Comet White Improved
Botanical Name: Argyranthemum frutescens
Applicant/Holder: NuFlora International Pty. Ltd.
63 Wills Road
Macquarie Fields, New South Wales
2564
Australia
Breeder: Mal Morgan, NuFlora International Pty. Ltd., Macquarie Fields, Australia
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2003-06-25
Application Number: 03-3736
Grant of Rights Date: 2007-06-04
Certificate Number: 2753
Date rights surrendered: 2014-06-04

Variety Description

Variety used for comparison: 'Argyraketis' (Shere Maggy White)

Summary: 'Cobwhite' has a taller plant height than 'Argyraketis'. 'Cobwhite' has darker leaf colour than 'Argyraketis'. 'Cobwhite' has a larger flower diameter than 'Argyraketis'. The longitudinal axis of the ray floret is incurving for 'Cobwhite' while it is straight for 'Argyraketis'. 'Cobwhite' has a smaller length to width ratio of the ray floret than 'Argyraketis'.

Description:

PLANT: upright bushy growth habit, moderately dense branching, early flowering

LEAF BLADE: base attenuate, apex acute, medium blue green on upper side

PEDUNCLE: very thin

FLOWER: single, ray floret incurving along longitudinal axis, ray floret white on upper and lower side, disc yellow orange before and after anther dehiscence.

Origin & Breeding History: 'Cobwhite' was discovered in Encinitas, California, USA in May, 2002. The variety was selected for its compact growth habit, early and floriferous flowering and white flowers.

Tests & Trials: 'Cobwhite' 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 'Cobwhite' with reference variety 'Argyraketis'

Plant height (cm)

  'Cobwhite' 'Argyraketis'
mean 30.3 25.4
std. deviation 1.52 2.37

Flower diameter (cm)

  'Cobwhite' 'Argyraketis'
mean 5.1 4.1
std. deviation 0.12 0.28

Ray floret length to width ratio

  'Cobwhite' 'Argyraketis'
length:width 3:1 4:1

Click on image for larger view
Cobwhite
Argyranthemum: 'Cobwhite' (left) with reference variety 'Argyraketis' (right)

Click on image for larger view
Cobwhite
Argyranthemum: 'Cobwhite' (left) with reference variety 'Argyraketis' (right)

Click on image for larger view
Cobwhite
Argyranthemum: 'Cobwhite' (left) with reference variety 'Argyraketis' (right)

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