Red Yoirvine

Chrysanthemum

Variety Description

Variety used for comparison: 'Red Yoauburn' (Red Auburn)

Summary: 'Red Yoirvine' has a shorter leaf than 'Red Yoauburn'. 'Red Yorivine' has a smaller flower head diameter than 'Red Yoauburn'. 'Red Yoirvine' has weak reflexing on the longitudinal axis of the ray floret while 'Red Yoauburn' is straight along the longitudinal axis. The apex of the ray floret is rounded for 'Red Yoirvine' while it is pointed for 'Red Yoauburn'. The outer side of the ray floret is purple red to dark pink red with lighter undertones of red pink for 'Red Yoirvine' while it is orange brown to light yellow brown mottled with brown red and yellow green at the base for 'Red Yoauburn'.

Description:

PLANT: spray flowering type, pot plant, 8 week response group, semi upright bushy growth habit, green stem

LEAF: terminal lobe medium in length relative to leaf length, lowest lateral lobe sinus medium in depth with parallel and touching margins, base obtuse, upper side medium to dark green

FLOWER HEAD: semi-double daisy type, medium density of ray florets
RAY FLORETS: ligulate, very short corolla tube, horizontal attitude at basal part, flat to weakly convex in cross section at widest point, weak reflexing of longitudinal axis, apex rounded with emarginate and mamillate tip, inner side dark purple red (RHS 46A) with red (RHS 47A) secondary colour, secondary colour distributed throughout in a mottled pattern, outer side purple red (RHS 54A) to dark pink red (RHS 51B) with undertones of red pink (RHS 51D)
DISC: small diameter relative to head diameter, yellow green before anther dehiscence, no dark spot present at centre before dehiscence, medium yellow at anther dehiscence.

Origin & Breeding History: 'Red Yoirvine' originated from a naturally occurring whole plant mutation of the parent variety 'Yoirvine' discovered and developed by the breeder, Mrs. Wendy Bergman, in December 2003 in Fort Myers, Florida, USA. 'Red Yorivine' was selected in March 2004, based on its strong and spreading growth habit, dark and glossy foliage colour, flower form, flower colour, response time and good winter performance. Asexual reproduction of the variety by vegetative tip cuttings was first conducted in Fort Myers, Florida, USA in March 2004.

Tests & Trials: Trials for 'Red Yoirvine' were conducted in Leamington, Ontario, in the fall of 2009. Flowering trials were performed under greenhouse conditions similar to those used in commercial chrysanthemum production. Forty unrooted cuttings of both the candidate and reference variety were directly stuck into 15 cm pots, with 4 cuttings per pot, 10 pots per variety, planted on August 24, 2009. Plants were spaced 30 cm apart and pinched once prior to short day treatment. All plants had the center bud removed. Observations and measurements were taken from 10 plants of each variety on November 6, 2009. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Red Yoirvine' with reference variety 'Red Yoauburn'

Leaf length (cm)

Flower head diameter (cm)

Colour of ray floret (RHS)

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Chrysanthemum: 'Red Yoirvine' (left) with reference variety 'Red Yoauburn' (right)

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Chrysanthemum: 'Red Yoirvine' (left) with reference variety 'Red Yoauburn' (right)