Denomination: 'Keiametsum'
Trade name: Surfinia Baby Purple Compact
Botanical Name: Petunia ×hybrida
Applicant/Holder: Keisei Rose Nurseries Inc.
1-12-1 Oshiage

Suntory Flowers Limited
Administrative Division
4-17-5 Shiba, Minato-ku
Tel: +81-3-5419-1382
Breeder: Kazunari Iwaki, Shiga, Japan
Shinya Miyano, Chiba-ken, Japan
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2005-03-29
Application Number: 05-4649
Grant of Rights Date: 2007-08-17
Certificate Number: 2832
Grant of Rights Termination Date: 2025-08-17

Variety Description

Varieties used for comparison: 'Keipabukas' (Surfinia Patio Blue) and 'Balsundeum' (Suncatcher Deep Plum)

Summary: 'Keiametsum' has a less upright growth habit than the reference varieties. 'Keiametsum' has a longer shoot length than 'Keipabukas'. 'Keiametsum' has darker leaf colour than 'Keipabukas'. 'Keiametsum' differs from the reference varieties in flower colour. 'Keiametsum' has less conspicuous veins on the upper side of the corolla than 'Balsundeum'. The anthers of 'Keiametsum' are yellowish-white before dehiscence while the anthers of 'Balsundeum' are light blue.


PLANT: semi-upright growth habit, medium height, medium to wide width

SHOOTS: thin, medium length, absent to very weak anthocyanin colouration

LEAVES: short to medium length, narrow to medium width, elliptic, narrow to broad acute apex, no variegation, dark green on upper side, no blistering, petiole short to medium length

SEPALS: short to medium length, narrow to medium width, linear to elliptic, no anthocyanin colouration

FLOWERS: short to medium length pedicel, single corolla, small to medium diameter, funnel form
COROLLA: moderate lobing, violet on upper and lower side, veins purple and very weak in conspicuousness, margin with medium to strong undulation
COROLLA TUBE: medium length, violet to light blue violet on inner side, veins medium in conspicuousness
ANTHERS: yellowish white before and after dehiscence.

Origin & Breeding History: 'Keiametsum' originated from a controlled cross between unnamed breeding lines, made in September 2000, at Sawara-shi, Chiba-ken, Japan. In April 2001, 100 seedlings were obtained from the cross and grown in pots in the glasshouse for evaluation. In July 2001, one seedling was selected based on its growth habit, flower size and flower colour.

Tests & Trials: The tests and trials for 'Keiametsum' were conducted in a polyhouse at BioFlora in St. Thomas, Ontario in the spring of 2006. The trials included 15 plants of each variety. Rooted cuttings were transplanted into six inch pots on April 17, 2006. Observations and measurements were taken from 10 plants of each variety. All colour measurements were made using the 2001 Royal Horticultural Society Colour Chart.

Comparison tables for 'Keiametsum' with reference varieties 'Keipabukas' and 'Balsundeum'

Shoot length (cm)

  'Keiametsum' 'Keipabukas' 'Balsundeum'
mean 24.1 9.3 21.8
std. deviation 2.74 1.61 2.07

Petiole length (mm)

  'Keiametsum' 'Keipabukas' 'Balsundeum'
mean 6.2 5.7 14.5
std. deviation 2.90 4.00 4.25

Colour of corolla (RHS)

  'Keiametsum' 'Keipabukas' 'Balsundeum'
upper side N81A with tones of N80A N87A N74A (redder than)
lower side 77B N87C-D 77A-B

Colour of corolla tube (RHS)

  'Keiametsum' 'Keipabukas' 'Balsundeum'
inner side N82C to 85A 85A-B and N155B 77A

Click on image for larger view
Petunia: 'Keiametsum' (left) with reference varieties 'Keipabukas' (left) and 'Balsundeum' (right)

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