MN98-E90-15

Chrysanthemum

Denomination: 'MN98-E90-15'
Previously Proposed Denomination: '98-E90-15'
Trade name: Mammoth Daisy Twilight Pink
Botanical Name: Chrysanthemum
Applicant/Holder: Regents of the University of Minnesota
Office for Technology Commercialization
Suite 160, 1000 Westgate Drive
St. Paul, Minnesota
55114-8658
United States of America
Breeder: Paul B. Savereide, Regents of the University of Minnesota, Minneapolis, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2001-02-28
Application Number: 01-2555
Grant of Rights Date: 2011-10-03
Certificate Number: 4192
Grant of Rights Termination Date: 2029-10-03

Variety Description

Variety used for comparison: 'Mammoth Daisy Dark Pink Mum'

Summary: The plants of 'MN98-E90-15' are taller than those of 'Mammoth Daisy Dark Pink Mum'. The lowest lateral sinus on the leaves of 'MN98-E90-15' is medium depth with converging to touching margins whereas it is deep with diverging to parallel margins on the leaves of 'Mammoth Daisy Dark Pink Mum'. There are few rows of ray florets with few ray florets on the flower heads of 'MN98-E90-15' whereas there are a medium number of rows with medium to many ray florets for those of 'Mammoth Daisy Dark Pink Mum'. The inner and outer surfaces of the ray florets of 'MN98-E90-15' are lighter purple than those of 'Mammoth Daisy Dark Pink Mum'. The flowers of 'MN98-E90-15' have a larger disc diameter than those of 'Mammoth Daisy Dark Pink Mum'.

Description:

PLANT: perennial garden mum, spray flowering type, bushy type, semi-upright growth habit, dense branching, green stem

LEAF: moderately upwards attitude of petiole, medium length/width ratio, medium to long terminal lobe relative to length of leaf, acute towards truncate base, medium green with absent to weak glossiness of upper surface
LOWEST LATERAL SINUS: medium depth, converging to touching margins

INFLORESCENCE: many flower heads per plant
FLOWER HEAD: semi-double, daisy type, single colour, few rows of ray florets
RAY FLORETS: ligulate type only, moderately ascending to horizontal attitude at basal part, upper surface keeled, two keels, very short corolla tube, flat profile in cross section at widest point, flat to weakly revolute margin throughout, straight longitudinal axis, rounded and emarginate tip, violet (RHS 75B-C) on upper surface, violet (RHS 75D) on lower surface
DISC: small diameter relative to head, slightly domed in cross section, yellow orange before and at anther dehiscence, small dark spot occasionally present at centre before anther dehiscence.

Origin & Breeding History: 'MN98-E90-15' originated from the open pollination of '95-331-6' as the female parent with an unknown variety as the male parent which was carried out in the chrysanthemum breeding fields in September 1997 in St. Paul, Minnesota, USA. The resulting progeny were sown in the greenhouse in February 1998 with one of the flowering progeny being selected during the fall of 1998 and designated '98-E90-15'. Multiplication of the variety took place through the use of terminal or stem cuttings.

Tests & Trials: Trials for 'MN98-E90-15' were conducted in an outdoor irrigated trial during the summer of 2010 in St. Thomas, Ontario. The trial included a total of 15 plants of each variety. All plants were grown from rooted cuttings and transplanted into 8x5 mum pans on June 29, 2010. Observations and measurements were taken from 10 plants of each variety on September 14, 2010. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'MN98-E90-15' with reference variety 'Mammoth Daisy Dark Pink Mum'

Plant height (cm)

  'MN98-E90-15' 'Mammoth Daisy Dark Pink Mum'
mean 25.1 18.9
std. deviation 2.14 1.15

Number of rows of ray florets

  'MN98-E90-15' 'Mammoth Daisy Dark Pink Mum'
mean 1.2 3.4

Number of ray florets

  'MN98-E90-15' 'Mammoth Daisy Dark Pink Mum'
mean 22.0 64.8

Main colour of ray floret (RHS)

  'MN98-E90-15' 'Mammoth Daisy Dark Pink Mum'
inner surface 75B-C 70B with white underlay
outer surface 75D N74D, white towards base

Disc diameter (cm)

  'MN98-E90-15' 'Mammoth Daisy Dark Pink Mum'
mean 2.2 1.8
std. deviation 0.12 0.05

Click on image for larger view
MN98-E90-15
Chrysanthemum: 'MN98-E90-15' (left) with reference variety 'Mammoth Daisy Dark Pink Mum' (right)

Click on image for larger view
MN98-E90-15
Chrysanthemum: 'MN98-E90-15' (left) with reference variety 'Mammoth Daisy Dark Pink Mum' (right)

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