Yellow Yowoodstock


Denomination: 'Yellow Yowoodstock'
Trade name: Yellow Woodstock
Botanical Name: Chrysanthemum
Applicant/Holder: Aris Horticulture Inc.
P.O. Box 230
Barberton, Ohio
United States of America
Breeder: Wendy Bergman, Syngenta Flowers, Inc., Alva, 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: 2003-09-30
Application Number: 03-3840
Date Withdrawn: 2007-11-22

Variety Description

Varieties used for comparison: 'Yowoodstock' (Woodstock) and 'Yellow Yoblush' (Yellow Blush)

Summary: Shape of the base of the leaf blade of 'Yellow Yowoodstock' is mostly truncate and asymmetrical while it is narrow to broad wedged for 'Yellow Yoblush'. The flower head type of 'Yellow Yowoodstock' is anemone centred while it is semi-double for 'Yellow Yoblush'. 'Yellow Yowoodstock' has yellow flower heads while those of 'Yowoodstock' are white and those of 'Yellow Yoblush' are darker yellow. The shape of the ray floret blade in cross-section is concave for 'Yellow Yowoodstock' while it is convex for 'Yellow Yoblush'. 'Yellow Yowoodstock' has petaloid type disc florets whereas those of 'Yellow Yoblush' are tubular.


PLANT: year round cultivation for pot production, spray flowering type, 8 week response group, short height
STEM: no anthocyanin colouration

LEAF: medium length, medium to broad, mostly truncate and asymmetrical base
LATERAL LOBE: diverging to parallel margins of sinus
LOWER LOBE: medium to long, medium deep sinus

FLOWER HEAD: anemone centered type, self coloured, yellow colour group of weak intensity, large to very large diameter, no bracts among ray florets
RAY FLORET: long blade with short corolla tube, incurved longitudinal axis of inner ray florets, reflexed longitudinal axis of outer ray florets, concave in cross-section, mamillate to dentate tip, yellow fading to light yellow green at margin on upper side, light yellow on lower side
DISC: yellow green before anther dehiscence, yellow after anther dehiscence, medium to large diameter
DISC FLORET: petaloid type, massed in centre of flower head, light green to green brown changing to yellow on inner side of flared apex and light yellow on outer side of tube at maturity

Origin & Breeding History: 'Yellow Yowoodstock' is a naturally occurring whole plant mutation of the Chrysanthemum variety 'Yowoodstock'. It was discovered in April 2001, in a controlled environment in Fort Myers, Florida, USA by the breeder, Mrs. Wendy R. Bergman, an employee of Yoder Brothers, Inc. in Barberton, Ohio, USA. The selection of 'Yellow Yowoodstock' was based on its uniform plant growth habit, desirable inflorescence form and floret colours, fast response time and excellent post production longevity.

Tests & Trials: Trials for 'Yellow Yowoodstock' were conducted in the fall of 2006 at Yoder Canada Ltd. in Leamington, Ontario. They were performed under greenhouse conditions similar to those used in commercial Chrysanthemum production. 40 unrooted cuttings per variety were directly stuck into 15 cm pots with 4 cuttings per pot and 10 pots per variety. The pots were spaced 30 cm apart. The plants were pinched once prior to short day treatment. All plants were disbudded by removal of lateral buds. Measured characteristics were based on measurements taken from 10 plants or parts of plants on November 2, 2006. All colour determinations were made using the 2001 Royal Horticulture Society (RHS) Colour Chart.

Comparison table for 'Yellow Yowoodstock' with reference varieties 'Yowoodstock' and 'Yellow Yoblush'

Ray floret colour (RHS)

  'Yellow Yowoodstock' 'Yowoodstock' 'Yellow Yoblush'
upper side 4A-B fading to 4C at margin whiter than 155D 5B
lower side closest to 10D whiter than 155D 3D

Click on image for larger view
Yellow Yowoodstock
Chrysanthemum: 'Yellow Yowoodstock' (left) with reference varieties 'Yowoodstock' (centre) and 'Yellow Yoblush' (right)

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