Yohudson Bay

Chrysanthemum

Variety Description

Variety used for comparison: 'Yosun City' (Point Pelee)

Summary: The flower head of 'Yohudson Bay' is semi-double while the flower head of 'Yosun City' is single. The ray floret of 'Yohudson Bay' is shorter and wider than the ray floret of 'Yosun City'. The inner side of the ray floret of 'Yohudson Bay' is dark purple red with yellow at the basal three quarters while the inner side of the ray floret of 'Yosun City' is dark purple red with bright yellow at the basal half along the margins only. The outer side of the ray floret of 'Yohudson Bay' is yellow green with brown purple at the apex area while the outer side of the ray floret of 'Yosun City' is light yellow with dark purple red to brown purple at the apex area.

Description:

PLANT: bushy type, semi-upright growth habit, green stem

PETIOLE: moderately upwards to horizontal attitude, medium length relative to leaf length
LEAF: terminal lobe long relative to leaf length, lowest lateral sinus deep with converging margins, base truncate, upper side medium green with weak glossiness, margin indentations deep and many in number

FLOWER: medium to many flower heads per plant, semi-double daisy head type
RAY FLORETS: two to three rows, predominantly ligulate type, horizontal to moderately descending attitude of basal part, upper surface with two keels, very short to short corolla tube, weakly concave in cross section at widest point, margin flat, weak reflexing along longitudinal axis at distal quarter, emarginate and dentate tip
RAY FLORET: inner side dark purple red (RHS 60A) with yellow (RHS 3C) secondary colour at basal three quarters in solid or nearly solid pattern, outer side yellow green (RHS 3D) with brown purple (RHS 186A) at tip
DISC: small diameter relative to head diameter, slightly domed, green to yellowish before anther dehiscence with no dark spot at centre, medium yellow at anther dehiscence.

Origin & Breeding History: The variety 'Yohudson Bay' originated from a controlled pollination conducted in February 2003 in Salinas, California, USA. The female parent was a proprietary seedling designated YB-A2579 and the male parent was a proprietary seedling designated YB-5465. The new variety was selected in November 2003 in Fort Myers, Florida. The selection criteria included compact growth habit, strong stems, flowering response time, flower form and colour, and excellent post production longevity. Asexual reproduction by vegetative tip cuttings was first conducted in Fort Myers, Florida, USA in February 2004.

Tests & Trials: Trials for 'Yohudson Bay' were conducted in a greenhouse trial during the Fall of 2011 in Niagara-on-the-Lake, Ontario. On August 8, 2011, fifty unrooted cuttings were directly stuck into 15 cm pots, with 5 cuttings per pot. The trial included a total of 10 pots of each variety spaced 30 cm apart. Plants were pinched once prior to short day treatment. Observations and measurements were taken from ten plants of each variety on November 8, 2011. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Yohudson Bay' with reference variety 'Yosun City'

Ray floret length (cm)

Ray floret width (cm)

Colour of ray floret (RHS)

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Chrysanthemum: 'Yohudson Bay' (left) with reference variety 'Yosun City' (right)

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Chrysanthemum: 'Yohudson Bay' (left) with reference variety 'Yosun City' (right)

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Chrysanthemum: 'Yohudson Bay' (left) with reference variety 'Yosun City' (right)