Purple Haze

Butterfly Bush

Denomination: 'Purple Haze'
Trade name: Lo & Behold Purple Haze
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: Dennis J. Werner, North Carolina State University, Raleigh, United States of America
Layne K. Snelling, 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: 2010-08-05
Application Number: 10-7046
Grant of Rights Date: 2012-12-14
Certificate Number: 4447
Grant of Rights Termination Date: 2030-12-14

Variety Description

Variety used for comparison: 'Blue Chip' (Lo & Behold Blue Chip)

Summary: The plants of 'Purple Haze' have a spreading growth habit while the plants of 'Blue Chip' have a bushy rounded growth habit. The leaf of 'Purple Haze' is longer than the leaf of 'Blue Chip'. The inflorescence of 'Purple Haze' is wider in diameter and longer in length than the inflorescence of 'Blue Chip'. The upper side of the corolla is a darker violet for 'Purple Haze' than for 'Blue Chip'.


PLANT: deciduous, spreading growth habit, medium foliage density
STEM: medium to thick, absent or very weak to weak anthocyanin colouration, edged shape, light green, no twisting

LEAF: opposite arrangement, simple, lanceolate shape, acuminate apex, cuneate base, crenate and dentate margin, medium glossiness on upper side, absent or very sparse pubescence on upper side, medium pubescence on lower side, upper side dark green, lower side grey green, no variegation, absent or very weak leaf fragrance

INFLORESCENCE: panicle, conical shape, erect attitude, medium to dense, medium fragrance
COROLLA: salverform, concave shape in profile, 4 lobes, strong undulation of margin, upper side violet (RHS N81A) with blue violet (RHS 90B) at margin, white (RHS NN155D) ring at base and yellow orange (RHS 21A) at throat, ages to lighter blue violet (RHS 90C)
COROLLA TUBE: inner side brown (RHS N172B), outer side violet (RHS N77D)
BUD: conical, dark violet (darker than RHS 86A).

Origin & Breeding History: The variety 'Purple Haze' originated from a controlled cross made in the summer of 2004 at North Carolina State University in Raleigh, North Carolina, USA. The female parent was the variety 'Miss Ruby' and the male parent was a proprietary selection designated NC2003-4. The resultant seedlings were planted in field trials in the spring of 2005 in Jackson Springs, North Carolina. The new variety was selected in the summer of 2005 based on its growth habit, dense branching, large florets and no seed set when grown in the field. The first asexual propagation by softwood and semi-hardwood stem cuttings was conducted in August 2005 in Raleigh, North Carolina, USA.

Tests & Trials: The variety 'Purple Haze' was tested in an outdoor trial during the summer of 2011 in St. Thomas, Ontario. The trial included of a total of 15 plants each of the candidate variety and the reference variety. All plants were grown from 4 1/2 inch rooted liners and transplanted into 3 gallon containers on July 7, 2011. Observations and measurements were taken from 10 plants of each variety on August 19, 2011. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Purple Haze' with reference variety 'Blue Chip'

Plant width (cm)

  'Purple Haze' 'Blue Chip'
mean 59.8 37.5
std. deviation 8.46 6.66

Leaf length (cm)

  'Purple Haze' 'Blue Chip'
mean 11.4 9.5
std. deviation 0.73 0.70

Inflorescence diameter (cm)

  'Purple Haze' 'Blue Chip'
mean 6.0 3.3
std. deviation 0.92 0.75

Inflorescence length (cm)

  'Purple Haze' 'Blue Chip'
mean 17.0 7.6
std. deviation 1.86 1.09

Colour of corolla (RHS)

  'Purple Haze' 'Blue Chip'
upper side N81A, 90B at margin, NN155D at base, 21A at throat N81C, 91A at margin, NN155D at base, 23A at throat

Click on image for larger view
Purple Haze
Butterfly Bush: 'Purple Haze' (left) with reference variety 'Blue Chip' (right)

Click on image for larger view
Purple Haze
Butterfly Bush: 'Purple Haze' (left) with reference variety 'Blue Chip' (right)

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