Denomination: 'SMNIGAB17'
Trade name: Gem Box
Botanical Name: Ilex glabra
Applicant/Holder: Spring Meadow Nursery, Inc.
12601 120th Avenue
Grand Haven, Michigan
United States of America
Breeder: Timothy D. Wood, Spring Lake, 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: 2014-07-18
Application Number: 14-8390

Variety Description

Variety used for comparison: 'Shamrock'

Summary: The plants of 'SMNIGAB17' are taller than those of 'Shamrock'. The degree of branching of plants of 'SMNIGAB17' is high whereas it is medium for 'Shamrock'. The leaf blade of 'SMNIGAB17' is smaller than that of 'Shamrock'. When newly opened, the upper side of the leaf blade of 'SMNIGAB17' is dark green with medium brown to brown purple tones along the margin and a strong intensity of anthocyanin colouration while the leaf blade of 'Shamrock' is light green with an absent to weak intensity of anthocyanin colouration.


PLANT: deciduous shrub, bushy rounded growth habit, narrow shape, high degree of branching, erect branch attitude, dense foliage, female

STEM: medium thickness, absent or very weak intensity of anthocyanin colouration, smooth, light green to medium green, no twisting

LEAF: alternate arrangement, simple type, elliptic and oblanceolate, acute apex, cuneate base, entire margin except for a few notches towards leaf apex, no undulation of margin, medium glossiness on upper side, smooth texture, no fragrance, when newly opened upper side is dark green (RHS N144A) with medium brown (RHS 175A) to brown purple (RHS 178A) tones along margins and a strong intensity of anthocyanin colouration, when fully opened upper side is medium green, light green to medium green on lower side, petiole present

Origin & Breeding History: 'SMNIGAB17' originated from an open pollinated cross made between the female parent 'UMASS' and an unknown male parent by the breeder, Timothy Wood, an employee of Spring Meadow Nursery, Inc. in Grand Haven, Michigan, USA, in May 2007. Seedlings were selected in June 2010 based on their plant growth habit, plant hardiness, foliage colour and foliage size. 'SMNIGAB17' was first propagated vegetatively by semi-hardwood cuttings in June 2010 in Grand Haven, Michigan, USA.

Tests & Trials: The comparative trial for 'SMNIGAB17' was conducted in an outdoor irrigated container trial during the spring and summer of 2016 at BioFlora Inc. in St. Thomas, Ontario. The trial included a total of 12 shrubs each of the candidate and reference variety. All shrubs were grown from 5.7 cm liners and planted into 7.6 liter containers on July 16, 2015. Plants were overwintered in an above-zero polyhouse. Observations and measurements were taken from 10 plants, or parts of plants, of each variety on June 10, 2016 and flower characteristics were observed on April 22, 2016. All colour determinations were made using the 2010 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'SMNIGAB17' with reference variety 'Shamrock'

Plant height (cm)

  'SMNIGAB17' 'Shamrock'
mean 29.1 24.6
std. deviation 1.92 1.45

Leaf blade length (cm)

  'SMNIGAB17' 'Shamrock'
mean 2.9 3.3
std. deviation 0.12 0.14

Colour of upper side of leaf blade (RHS)

  'SMNIGAB17' 'Shamrock'
newly opened 144A with 175A to 178A tones along margin N144A

Click on image for larger view
Inkberry: 'SMNIGAB17' (left) with reference variety 'Shamrock' (right)

Click on image for larger view
Inkberry: 'SMNIGAB17' (left) with reference variety 'Shamrock' (right)

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