Denomination: 'Baldelmarm'
Trade name: Delicious Marmalade
Botanical Name: Dahlia pinnata
Applicant/Holder: Ball Horticultural Company
622 Town Road
West Chicago, Illinois
United States of America
Breeder: Ball Horticultural Company, West Chicago, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2006-03-09
Application Number: 06-5289
Date Withdrawn: 2008-12-18

Variety Description

Variety used for comparison: 'Dapaor' (Dahlietta Rachel)

Summary: 'Baldelmarm' has a taller plant and larger flower head diameter with more, longer ray florets per flower head than 'Dapaor'. Relative to the size of the flower head, the disc of 'Baldelmarm' is small whereas the disc of 'Dapaor' is very small.


PLANT: upright to bushy growth habit
STEM: medium green, no anthocyanin colouration

LEAF: compound type, 1.2:1 length/width ratio, usually 3 leaflets, medium to dark green on upper side, wings on petiole and rachis present, medium number of moderately deep incisions of margin, smooth or very weakly rugose texture on upper side, raised veins on upper side

FLOWER HEAD: no anthocyanin colouration of the peduncle, positioned at the same level as foliage, attitude relative to peduncle ranges from approximately right-angle to weakly acute, daisy-eyed double decorative type, blended colour type, orange colour group, many and dense ray florets
RAY FLORET: 1.8:1 length/width ratio, inner ray florets are incurving along longitudinal axis, outer ray florets are reflexing along longitudinal axis, cross-section at mid-point of inner ray florets is moderately folded inward in V-shape, cross-section at mid-point of outer ray florets is weakly concave in U-shape, lateral margins at middle are flat, deeply dentate tip, uneven colour distribution, upper side is red to red orange blended with orange brown margins and yellow at centre of base, lower side is orange red to orange brown with yellow streaks
DISC: small diameter in relation to flower head, yellow before anther dehiscence, yellow to orange at anther dehiscence

Origin & Breeding History: 'Baldelmarm' was discovered in June 2003 as a naturally occurring sport of 'Baldelemz' (Delicious Lemon Zest) at Lavendelweg 10, Rijsenhuot, The Netherlands. It was selected in June 2004 for its flower colour and plant growth habit. Since its discovery, asexual propagation has been through the use of vegetative cuttings.

Tests & Trials: Trials for 'Baldelmarm' were conducted in a polyhouse during the summer of 2007 at BioFlora Inc. in St. Thomas, Ontario. The trial included 15 plants per variety. All plants were grown from rooted cuttings and transplanted into 15 cm pots on May 10, 2007. Observations and measurements were taken from 10 plants of each variety on July 27 and August 8, 2007. All colour determinations were made using the 2001 Royal Horticulture Society (RHS) Colour Chart.

Comparison tables for 'Baldelmarm' with reference variety 'Dapaor'

Plant height (cm)

  'Baldelmarm' 'Dapaor'
mean 22.5 18.5
std. deviation 1.38 0.78

Flower head diameter (cm)

  'Baldelmarm' 'Dapaor'
mean 7.9 6.7
std. deviation 0.57 0.48

Ray floret length (mm)

  'Baldelmarm' 'Dapaor'
mean 34.2 24.4
std. deviation 3.46 2.17

Click on image for larger view
Dahlia: 'Baldelmarm' (left) with reference variety 'Dapaor' (right)

Click on image for larger view
Dahlia: 'Baldelmarm' (left) with reference variety 'Dapaor' (right)

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