Rosy Yoigloo


Denomination: 'Rosy Yoigloo'
Trade name: Rosy Igloo
Botanical Name: Chrysanthemum ×morifolium
Applicant/Holder: Aris Horticulture Inc.
P.O. Box 230
Barberton, Ohio
United States of America
Breeder: Mark Smith, Syngenta Flowers, Inc., Gilroy, United States of America
Agent in Canada: Keepsake Plants, Ltd.
P.O. Box 370
268 Seacliff Drive West
Leamington, Ontario
N8H 3W3
Tel: 519-326-6121; Ext.224
Application Date: 2007-01-24
Application Number: 07-5721
Grant of Rights Date: 2008-11-24
Certificate Number: 3416
Date rights surrendered: 2013-11-06

Variety Description

Varieties used for comparison: 'Warm Yoigloo' (Warm Igloo), 'Mammoth Coral' and 'Mei Kyo'

Summary: 'Rosy Yoigloo' has a shorter plant than that of 'Mei Kyo' and smaller leaves than those of 'Mammoth Coral' and 'Mei Kyo'. The margins of the sinus between the lateral lobes of the leaf are diverging for 'Rosy Yoigloo' while they are parallel to converging for 'Mammoth Coral' and 'Mei Kyo'. 'Rosy Yoigloo' begins flowering earlier than 'Mammoth Coral' and 'Mei Kyo'. 'Rosy Yoigloo' has a smaller flower head diameter than 'Mammoth Coral' and a larger flower head diameter than 'Mei Kyo'. The flowers of 'Rosy Yoigloo' belong to the red bronze colour group while those of 'Warm Yoigloo' belong to the yellow bronze colour group and those of 'Mammoth Coral' and 'Mei Kyo' belong to the pink colour group.


PLANT: perennial garden chrysanthemum, natural season cultivation, cushion flowering type, USDA zone 5-9
STEM: absent to weak anthocyanin colouration

LEAF: broad wedged base, diverging margins of sinus between lateral lobes

FLOWERING: begins early
FLOWER HEAD: double type, chromatic self colour type, medium to dark red bronze colour group
RAY FLORET: longitudinal axis of majority is slightly reflexing, convex in cross-section, tip ranges from emarginate to mamillate, inner ray florets are dark pink red on upper side, outer ray florets are orange brown to orange pink on upper side, lower side is orange

Origin & Breeding History: 'Rosy Yoigloo' was discovered by the breeder, Mr. Mark A. Smith, an employee of Yoder Brothers, Inc. in Barberton, Ohio, USA. It is a naturally occurring whole plant mutation of the Chrysanthemum variety 'Warm Yoigloo'. 'Rosy Yoigloo' was discovered and selected in December 2003, in Alva, Florida, USA. The selection of this plant was based on its early (natural season) flowering time, uniform plant growth habit, desirable inflorescence form, inflorescence size and floret colour. Asexual reproduction of 'Rosy Yoigloo' by vegetative tip cuttings was first conducted in Alva, Florida, USA in February 2004.

Tests & Trials: Trials for 'Rosy Yoigloo' were conducted outdoors during the summer of 2007 at BioFlora Inc. in St. Thomas, Ontario. Twenty liners of each variety were transplanted into 20 cm pots on June 7, 2007. The plants were grown outdoors with drip irrigation, in rows spaced 50 cm apart. Observations and measurements were taken from 10 plants of each variety on August 30. Flower characteristics were observed at full flower on October 18 & 25. All colour determinations were made using the 2001 Royal Horticulture Society (RHS) Colour Chart.

Comparison tables for 'Rosy Yoigloo' with reference varieties 'Warm Yoigloo', 'Mammoth Coral' and 'Mei Kyo'

Plant height (cm)

  'Rosy Yoigloo' 'Warm Yoigloo' 'Mammoth Coral' 'Mei Kyo'
mean 18.8 17.0 N/A 31.6
std. deviation 1.13 1.20 N/A 2.70

Leaf length (cm)

  'Rosy Yoigloo' 'Warm Yoigloo' 'Mammoth Coral' 'Mei Kyo'
mean 4.5 5.6 8.2 6.5
std. deviation 0.38 1.31 1.08 1.09

Leaf width (cm)

  'Rosy Yoigloo' 'Warm Yoigloo' 'Mammoth Coral' 'Mei Kyo'
mean 2.7 3.2 4.2 4.2
std. deviation 0.25 0.68 0.43 0.69

Flower head diameter (cm)

  'Rosy Yoigloo' 'Warm Yoigloo' 'Mammoth Coral' 'Mei Kyo'
mean 4.0 4.2 5.9 3.2
std. deviation 0.16 0.28 0.27 0.19

Colour of upper side of ray floret (RHS)

  'Rosy Yoigloo' 'Warm Yoigloo' 'Mammoth Coral' 'Mei Kyo'
bud / newly open 46A-53B 46A-N34A with yellow on outer florets N/A 70B with N74D under-colour
fully open inner florets: N34C; outer florets: 31C-D inner florets: 31B-C with N34A-46A over-colour; outer florets: 18A-20B with 7A at base 54C with shades of 56B N74D-76C under-colour with 70B tips

Colour of ray floret (RHS)

  'Rosy Yoigloo' 'Warm Yoigloo' 'Mammoth Coral' 'Mei Kyo'
lower side 26D/24D 16D/19D with 46A/53B under-colour N/A 77C with pink under-colour

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Rosy Yoigloo
Chrysanthemum: 'Rosy Yoigloo' (left) with reference variety 'Warm Yoigloo' (right)

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Rosy Yoigloo
Chrysanthemum: 'Rosy Yoigloo' (left) with reference varieties 'Warm Yoigloo' (centre) and 'Mammoth Coral' (right)

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Rosy Yoigloo
Chrysanthemum: 'Rosy Yoigloo' (left) with reference varieties 'Warm Yoigloo' (centre) and 'Mei Kyo' (right)

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