USMECA8205

Mecardonia

Denomination: 'USMECA8205'
Trade name: Gold Dust
Botanical Name: Mecardonia
Applicant/Holder: Plant 21 LLC
32149 Aquaduct Road
Bonsall, California
92003
United States of America
Breeder: Ushio Sakazaki, Shiga, Japan
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2010-02-25
Application Number: 10-6871
Grant of Rights Date: 2012-08-23
Certificate Number: 4383
Grant of Rights Termination Date: 2030-08-23

Variety Description

Variety used for comparison: 'Sunmecakira' (Bright Yellow)

Summary: The leaves of 'USMECA8205' are shorter than those of 'Sunmecakira'. There are a medium number of teeth on the leaf blades of 'USMECA8205' while there are many on 'Sunmecakira'. The leaf blade of 'USMECA8205' is dark green on the upper side while it is medium green for 'Sunmecakira'. 'USMECA8205' has a shorter calyx length and a smaller corolla than 'Sunmecakira'. 'USMECA8205' has absent to weak reflexing of the corolla lobes while it is medium for 'Sunmecakira'. The corolla of 'USMECA8205' is a slightly lighter yellow than the corolla of 'Sunmecakira'. There are a medium number of markings on the upper corolla lobe of 'USMECA8205' while there are many markings on the upper corolla lobe of 'Sunmecakira'.

Description:

PLANT: mounding to trailing growth habit, dense branching
STEM: weak intensity of anthocyanin colouration on upper stem, stem wings present

LEAVES: simple, elliptic and ovate, serrate margin incisions, medium number of teeth, no variegation, dark green on upper side, absent or very sparse pubescence

FLOWER: weak intensity of anthocyanin colouration on pedicel, absent to weak reflexing of margin of corolla lobes, yellow (RHS 7B) on upper side
MARKINGS ON UPPER COROLLA LOBES: brown purple (RHS 183A), weak to moderately conspicuous, medium number

Origin & Breeding History: 'USMECA8205' originated from the cross between '06M53' and '06M54', made in 2007 at Higashiomi, Shiga, Japan. The new cultivar was selected from the resultant progeny on May 21, 2008 in Bonsall, California, USA, based on good branching, early and abundant flowering, and flower size.

Tests & Trials: Trials for 'USMECA8205' were conducted in a polyhouse during the spring of 2011 in St. Thomas, Ontario. The trial included a total of 15 plants each of the candidate and reference varieties. All plants were grown from rooted cuttings and transplanted into 15 cm pots on April 15, 2011. Observations and measurements were taken from 10 plants of each variety on June 1, 2011. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'USMECA8205' with reference variety 'Sunmecakira'

Leaf length (cm)

  'USMECA8205' 'Sunmecakira'
mean 1.6 2.6
std. deviation 0.14 0.18

Calyx length (mm)

  'USMECA8205' 'Sunmecakira'
mean 5.6 11.8
std. deviation 0.52 0.63

Corolla width (mm)

  'USMECA8205' 'Sunmecakira'
mean 14.2 17.4
std. deviation 0.97 0.88

Corolla length/height (mm)

  'USMECA8205' 'Sunmecakira'
mean 10.6 14.4
std. deviation 0.73 1.13

Colour of corolla lobes (RHS)

  'USMECA8205' 'Sunmecakira'
upper side 7B 9A

Click on image for larger view
USMECA8205
Mecardonia: 'USMECA8205' (left) with the reference variety 'Sunmecakira' (right)

Click on image for larger view
USMECA8205
Mecardonia: 'USMECA8205' (left) with the reference variety 'Sunmecakira' (right)

Click on image for larger view
USMECA8205
Mecardonia: 'USMECA8205' (left) with the reference variety 'Sunmecakira' (right)

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