Miss Ruby

Butterfly Bush

Denomination: 'Miss Ruby'
Botanical Name: Buddleja
Applicant/Holder: North Carolina State University
Office of Technology Transfer
1021 Main Campus Drive
Raleigh, North Carolina
United States of America
Breeder: Layne K. Snelling, North Carolina State University, Raleigh, United States of America
Dennis J. Werner, North Carolina State University, Raleigh, 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: 2007-11-16
Application Number: 07-6047
Grant of Rights Date: 2009-09-08
Certificate Number: 3603
Grant of Rights Termination Date: 2027-09-08

Variety Description

Variety used for comparison: 'Peakeep' (Peacock)

Summary: 'Miss Ruby' has a smaller inflorescence diameter and shorter inflorescence length than 'Peakeep'. 'Miss Ruby' has a smaller corolla diameter than 'Peakeep'. 'Miss Ruby' differs from 'Peakeep' in the colour of the corolla and flower bud.


SHRUB: deciduous, upright bushy growth habit, medium branching density, sparse to medium foliage density
STEM: thick, weak anthocyanin colouration, edged, green brown, no twisting

LEAF: opposite arrangement, simple, lanceolate, acuminate apex, acute base, crenate to dentate margin, weak glossiness on upper side, sparse pubescence on upper side, dense tomentose pubescence on lower side, no fragrance, medium green on upper side, grey green on lower side, no variegation, petiole present

FLOWER: panicle, salverform shape, both terminal and axillary in position, erect attitude, weak to medium fragrance
FLOWER BUD: conical, purple
COROLLA: flat in profile, reflexing tip, 4 to 5 lobes, rounded lobe shape, weak undulation of margin, obtuse apex with dentate margin, purple on upper side
COROLLA TUBE: yellow orange on inner side, dark purple red on outer side.

Origin & Breeding History: 'Miss Ruby' originated as a first generation descendent from a cross between 'White Ball' and 'Attraction', made in 2002 at the North Carolina State University in Raleigh, North Carolina, USA. The seeds resulting from the cross were harvested in the fall of 2002 and germinated in a greenhouse at North Carolina State University in the winter of 2003. The resulting seedlings were planted in field trials in spring of 2003. These plants flowered in summer of 2003 and one seedling was selected for its compact growth habit, attractive grey-green leaf colour and flower colour. This seedling was initially designated NC2003-22 and then given the denomination 'Miss Ruby'. The first asexual propagation by softwood to semi-hardwood stem cuttings was conducted in the fall of 2003.

Tests & Trials: 'Miss Ruby' was tested in an outdoor trial during the spring/summer of 2008 in St. Thomas, Ontario. The trial consisted of a total of 16 plants of the candidate variety and 8 plants of the reference variety. All plants were grown from 4 1/2 inch rooted liners in the spring of 2008 and transplanted into 3 gallon containers. Observations and measurements were taken from 10 plants of each variety on July 25, 2008. All colour measurements were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Miss Ruby' with reference variety 'Peakeep'

Inflorescence diameter (cm)

  'Miss Ruby' 'Peakeep'
mean 4.4 5.8
std. deviation 0.54 0.61

Inflorescence length (cm)

  'Miss Ruby' 'Peakeep'
mean 11.6 16.9
std. deviation 1.59 2.89

Corolla diameter (mm)

  'Miss Ruby' 'Peakeep'
mean 8.6 10.7
std. deviation 0.52 0.48

Flower colour (RHS)

  'Miss Ruby' 'Peakeep'
flower bud 64A N82A-B
corolla - upper side 71B-C 84A
corolla tube - inner side 21A 25A
corolla tube - outer side 60B 87A

Click on image for larger view
Miss Ruby
Butterfly Bush: 'Miss Ruby' (left) with reference variety 'Peakeep' (right)

Click on image for larger view
Miss Ruby
Butterfly Bush: 'Miss Ruby' (left) with reference variety 'Peakeep' (right)

Click on image for larger view
Miss Ruby
Butterfly Bush: 'Miss Ruby' (left) with reference variety 'Peakeep' (right)

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