Denomination: 'USPHL304'
Previously Proposed Denomination: 'USPHLO304'
Trade name: Intensia Lavender Glow Improved
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: 2005-05-06
Application Number: 05-4885
Grant of Rights Date: 2007-06-08
Certificate Number: 2805
Date rights surrendered: 2014-06-08

Variety Description

Variety used for comparison: 'Sunphlorome' (Astoria Pink White Star)

Summary: 'USPHL304' has a slightly taller plant height than 'Sunphlorome'. The leaf of 'USPHL304' is a lighter green colour than 'Sunphlorome'. 'USPHL304' has a fewer number of florets in the cyme than 'Sunphlorome'. The pedicel of 'USPHL304' is slightly longer than 'Sunphlorome'. 'USPHL304' has a broad acute shaped petal apex while in 'Sunphlorome' it is cuspidate. The eye zone of 'USPHL304' is slightly larger than 'Sunphlorome'. 'USPHL304' has a slightly lighter purple petal colour than 'Sunphlorome'. The margin of the lower side of the flower petal in 'USPHL304' has less prominent purple colour than the red purple of 'Sunphlorome'.


PLANT: annual type, semi-upright to trailing growth habit, flowers early in the season

LEAF: subulate to lanceolate shape, glandular stickiness present, dense pubescence on upper side, medium to dense pubescence on the lower side, medium green colour

INFLORESCENCE: flat to dome shaped, compound cyme type
FLORET: round shape, tricoloured (including eye), purple colour group
PETAL: broad acute shaped apex, medium fringing of the margin, violet (RHS 78B) apical zone on upper side, white (RHS 155A) basal zone on upper side, star shaped eye that is violet (RHS N78A), light blue violet (RHS 76C-D) apical zone on lower side with light blue violet streaks (RHS 76A) , light blue violet (RHS 76C-D) basal zone on lower side.

Origin & Breeding History: 'USPHL304' is the product of a planned breeding program with the objectives to create new vigorous Phlox varieties that are heat tolerant and have a long flowering period. 'USPHL304' originated from a controlled cross conducted in Hikone, Japan on March 29, 2001, with a seed raised Phlox drummondii variety with magenta flowers as the female parent and a wild Phlox sp. as the male parent. The new phlox was selected as a single plant from the resultant progeny on May 24, 2002. Selection criteria included strong plant vigour, tolerance to heat, long flowering period and low seed set.

Tests & Trials: Tests and trials were conducted in a polyhouse during the spring of 2006 in St. Thomas, Ontario. Trials included 15 plants each of the candidate and reference variety. Observations and measurements were taken from 10 plants. All colour measurements were made using RHS colour chart 2001.

Comparison tables for 'USPHL304' with reference variety 'Sunphlorome'

Plant height (cm)

  'USPHL304' 'Sunphlorome'
mean 22.3 16.7
std. deviation 4.04 3.09

Floret: number

  'USPHL304' 'Sunphlorome'
mean 6.9 9.7
std. deviation 1.20 1.06

Pedicel length (cm)

  'USPHL304' 'Sunphlorome'
mean 1.3 0.7
std. deviation 0.45 0.22

Petal colour (RHS)

  'USPHL304' 'Sunphlorome'
upper apical zone N78B with tones of N80B N78A-B
upper basal zone N78A surrounded by 155A splashes of N74A with radiating 155A
eye zone N78A darker than N74A
lower apical zone 76C-D with streaks of 76A 76D with 72B in margin area
lower basal zone 76C-D 76D with N155B

Click on image for larger view
Phlox: 'USPHL304' (left) with reference variety 'Sunphlorome' (right)

Click on image for larger view
Phlox: 'USPHL304' (left) with reference variety 'Sunphlorome' (right)

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