Denomination: 'USPLX60306'
Trade name: Intensia Blueberry
Botanical Name: Phlox
Applicant/Holder: Plant 21 LLC
32149 Aquaduct Road
Bonsall, California
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
Tel: 519-631-6241
Application Date: 2009-03-27
Application Number: 09-6597
Grant of Rights Date: 2011-08-19
Certificate Number: 4144
Grant of Rights Termination Date: 2029-08-19

Variety Description

Variety used for comparison: 'Sunphloburu' (Astoria Blue)

Summary: The plants of 'USPLX60306' are taller than the plants of 'Sunphloburu'. The leaf blade is longer for 'USPLX60306' than for 'Sunphloburu'. The leaf blade of 'USPLX60306' is lanceolate in shape while the leaf blade of 'Sunphloburu' is ovate in shape. The corolla of 'USPLX60306' has a darker violet eye than the corolla of 'Sunphloburu'. The upper side of the petals of 'USPLX60306' are darker violet than the petals of 'Sunphloburu'.


PLANT: upright bushy growth habit
STEM: medium thickness at middle third, no anthocyanin colouration

LEAF: lanceolate shape, concave to flat in cross section, acute apex, no variegation, no anthocyanin colouration, no margin undulation, glandular stickiness present, medium pubescence on upper and lower side, upper side medium green

INFLORESCENCE: dome shape, no anthocyanin colouration in pedicel and calyx, early time of flowering
COROLLA: round shape, single, bicolour, purple colour group
PETAL: obovate, apex cuspidate, weak fringe on margin, petals overlapping, upper side violet (RHS N81A) with streaks and speckles of lighter violet (RHS N82A) when newly opened, violet (RHS N87A) with streaks and speckles of violet (RHS N82A) when fully opened, eye markings on upper side dark violet (RHS 83A), lower side violet (RHS 84A) at margin and white (RHS NN155B) at basal zone, markings on lower side light blue violet (RHS 85B-C) in streaks and speckles.

Origin & Breeding History: The variety 'USPLX60306' originated from a controlled cross conducted in Higashiomi, Shiga, Japan on September 9, 2006. The cross was between the female seed parent, the variety 'Candy Box Blue' and the male parent, a blue flowered seedling. The new variety was selected as a single plant from the resultant progeny on July 17, 2007 in Bonsall, California, USA. The variety was selected based on flower colour and stability, good resistance to powdery mildew and good propagation characteristics. Propagation by vegetative cuttings was first conducted on July 23, 2007 in Bonsall, California, USA.

Tests & Trials: Trials for 'USPLX60306' were conducted in a polyhouse during the spring of 2010 in St. Thomas, Ontario. The trial included a total of fifteen plants of the candidate and reference varieties. Rooted cuttings were transplanted into 15 cm pots on April 29, 2010. Observations and measurements were taken from ten plants or parts of plants on June 17, 2010. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'USPLX60306' with reference variety 'Sunphloburu'

Plant height (cm)

  'USPLX60306' 'Sunphloburu'
mean 27.8 17.8
std. deviation 1.86 1.47

Leaf blade length (cm)

  'USPLX60306' 'Sunphloburu'
mean 3.0 1.8
std. deviation 0.16 0.19

Colour of upper side of petal (RHS)

  'USPLX60306' 'Sunphloburu'
newly opened N81A, with N82A streaks/speckles 85D with N80B and N82B streaks/speckles
fully opened N87A with N82A streaks/speckles 85C-D with N82C-D streaks/speckles
eye 83A N81A

Click on image for larger view
Phlox: 'USPLX60306' (left) with reference variety 'Sunphloburu' (right)

Click on image for larger view
Phlox: 'USPLX60306' (left) with reference variety 'Sunphloburu' (right)

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