Emerald Crest
| Denomination: | 'Emerald Crest' |
|---|---|
| Botanical Name: | Cupressus macrocarpa |
| Applicant/Holder: |
Ikuma, Masanari 15916 29'th Drive, South East Millcreek, Washington 98012 United States of America |
| Breeder: |
Masanari Ikuma, Millcreek, United States of America |
| Agent in Canada: |
Smiths IP 330-1508 West Broadway Vancouver, British Columbia V6J 1W8 Canada Tel: 604-689-7276 |
| Application Date: | 2006-11-10 |
| Application Number: | 06-5668 |
| Date abandoned: | 2011-08-03 |
Variety Description
Variety used for comparison: 'Wilma Goldcrest'
Summary: Plants of 'Emerald Crest' are taller than 'Wilma Goldcrest'. 'Emerald Crest' has a longer spray than 'Wilma Goldcrest'. The density of branchlets of 'Emerald Crest' is sparse to medium while that of 'Wilma Goldcrest' is medium to dense. The upper and lower side of the leaves of 'Emerald Crest' are dark green (RHS 137A) while those of 'Wilma Goldcrest' are yellow green (RHS 145A).
Description:
PLANT: evergreen, narrow pyramidal shape, dense foliage, medium green with at least one branch that is yellow green in colour
BRANCH: medium density, erect to semi-erect attitude, medium stiffness, reddish brown bark
SPRAY: sparse to medium density of branchlets, yellow green stem
BRANCHLET: sparse to medium density of tertiary branchlets along secondary branchlets, light green, no anthocyanin colouration on stem
LEAF: imperfect radial arrangement, linear shape, narrow acute apex, entire margin, weakly involute margin fold, dark green (RHS 137A) on upper side and lower side
Origin & Breeding History: 'Emerald Crest' was discovered as a sport of Cupressus macrocarpa 'Wilma Goldcrest' in 2000 in Snohomish, Washigton, US. The selection was based on a darker foliage than its parent 'Wilma Goldcrest'.
Tests & Trials: The trials were conducted in a polyhouse during the summer of 2009 in St. Thomas, Ontario. The trial included a total of 10 plants of the candidate variety and the reference variety. All plants were grown from rooted liners planted into 1 gallon containers. At the time of the trial, plants were almost 2 years old. Observations and measurements were taken on September 18, 2008. All colour measurements were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.
Comparison tables for 'Emerald Crest' with reference variety 'Wilma Goldcrest'
Plant height (cm)
| 'Emerald Crest' | 'Wilma Goldcrest' | |
|---|---|---|
| mean | 55.6 | 48.5 |
| std. deviation | 5.23 | 2.59 |
Spray length (cm)
| 'Emerald Crest' | 'Wilma Goldcrest' | |
|---|---|---|
| mean | 20.1 | 16.5 |
| std. deviation | 1.58 | 3.33 |
Click on image for larger view
Monterey Cypress: 'Emerald Crest' (left) with reference variety 'Wilma Goldcrest' (right)
Click on image for larger view
Monterey Cypress: 'Emerald Crest' (left) with reference variety 'Wilma Goldcrest' (right)
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