SB108
| Denomination: | 'SB108' |
|---|---|
| Botanical Name: | Buxus microphylla |
| Applicant/Holder: |
Saunders Genetics LLC 2717 Tyebrook Hwy. Piney River, Virginia 22964 United States of America |
| Breeder: |
Rollin Edgerton Woolley, Gloucester, United States of America |
| Agent in Canada: |
BioFlora Inc. 38723 Fingal Line R.R. #1 St. Thomas, Ontario N5P 3S5 Canada Tel: 519-317-7511 |
| Application Date: | 2019-10-08 |
| Provisional Protection: | 2019-10-08 |
| Application Number: | 19-10014 |
| Grant of Rights Date: | 2025-12-30 |
| Certificate Number: | 7548 |
| Grant of Rights Termination Date: | 2045-12-30 |
Variety Description
Varieties used for comparison: 'Green Beauty' and 'Jim Stauffer'
Summary: The stem shoots of 'SB108' are shorter and thinner than those of the reference varieties. In the summer, the plants of 'SB108' are shorter than those of 'Green Beauty' and taller than those of 'Jim Stauffer'. The plants of 'SB108' are narrower than those of 'Green Beauty'. The number of branches of the plants of 'SB108' is medium to many whereas it is few to a medium for 'Green Beauty'. The leaf blade of 'SB108' is narrower than that of the reference varieties. The leaf blade shape of 'SB108' is obovate while that of the reference varieties is broad elliptic. The petiole of 'SB108' is shorter than that of 'Green Beauty' and longer than that of 'Jim Stauffer'.
Description:
SHRUB: evergreen type, bushy-rounded growth habit, compact shape, medium to many branches, medium to dense foliage
STEM: absent or very weak intensity of anthocyanin colouration, edged shape, light brown, no twisting
PETIOLE: present
LEAF: opposite arrangement, simple type
YOUNG LEAF BLADE: light green (RHS 144C) on upper side
LEAF BLADE: obovate shape, weakly retuse shape of apex, cuneate shape of base, entire margin, no variegation, strong contrast between new and mature growth
LEAF BLADE (UPPER SIDE): medium glossiness, absent or very sparse pubescence, dark brown green to dark green (RHS 137A-B) mature growth, dark brown green (closest to RHS 146A) winter foliage
LEAF BLADE (LOWER SIDE): absent or very sparse pubescence, light green, medium green (closest to RHS 144A) winter foliage
Origin & Breeding History: 'SB108' was discovered in 1989 as a chance seedling of unknown parentage, in a garden in Williamsburg, Virginia. After further evaluation, 'SB108' was selected as a unique plant in 2005. The selection criteria included growth habit, leaf characteristics and disease resistance characteristics.
Tests & Trials: The comparative trial of 'SB108' was conducted as an irrigated greenhouse container trial during the summer of 2024 at BioFlora Inc. in St. Thomas, Ontario. The trial included a total of 10 shrubs each of the candidate and the reference varieties. All shrubs were grown from 5.5 cm liners that were each planted into a 4 litre container in August 2023. Observations and measurements were taken from 10 plants or parts of plants of the candidate and reference varieties on June 14, 2024. The flowering characteristics were not assessed. All colour determinations were made using the 2015 Royal Horticultural Society (RHS) Colour Chart.
Comparison tables for 'SB108' with reference varieties 'Green Beauty' and 'Jim Stauffer'
Stem shoot thickness (cm)
| 'SB108' | 'Green Beauty' | 'Jim Stauffer' | |
|---|---|---|---|
| mean | 1.13 | 1.48 | 1.63 |
| std. deviation | 0.20 | 0.26 | 0.18 |
Stem shoot length (cm)
| 'SB108' | 'Green Beauty' | 'Jim Stauffer' | |
|---|---|---|---|
| mean | 16.93 | 19.17 | 14.87 |
| std. deviation | 1.58 | 2.82 | 1.72 |
Plant height in summer (cm)
| 'SB108' | 'Green Beauty' | 'Jim Stauffer' | |
|---|---|---|---|
| mean | 15.71 | 19.19 | 15.96 |
| std. deviation | 1.30 | 2.51 | 2.29 |
Leaf blade width (cm)
| 'SB108' | 'Green Beauty' | 'Jim Stauffer' | |
|---|---|---|---|
| mean | 0.98 | 1.10 | 1.10 |
| std. deviation | 0.09 | 0.06 | 0.10 |
Petiole length (cm)
| 'SB108' | 'Green Beauty' | 'Jim Stauffer' | |
|---|---|---|---|
| mean | 0.36 | 0.43 | 0.30 |
| std. deviation | 0.05 | 0.06 | 0.06 |
Click on image for larger view
Boxwood: ‘SB108' (left) with reference varieties ‘Green Beauty' (centre) and ‘Jim Stauffer' (right)
Click on image for larger view
Boxwood: ‘SB108' (left) with reference varieties ‘Green Beauty' (centre) and ‘Jim Stauffer' (right)
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