Crystalina
| Denomination: | 'Crystalina' |
|---|---|
| Trade name: | Sugartina |
| Botanical Name: | Clethra alnifolia |
| Applicant/Holder: |
North Carolina State University Office of Technology Transfer 1021 Main Campus Drive Raleigh, North Carolina 27606 United States of America |
| Breeder: |
Thomas Green Ranney, North Carolina State University, Arden, 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: | 2009-09-17 |
| Application Number: | 09-6728 |
| Grant of Rights Date: | 2011-08-19 |
| Certificate Number: | 4160 |
| Grant of Rights Termination Date: | 2029-08-19 |
Variety Description
Variety used for comparison: 'Caleb' (Vanilla Spice)
Summary: The plants of 'Crystalina' are narrower than those of 'Caleb'. The petioles of 'Crystalina' have dense pubescence while those of 'Caleb' have sparse pubescence. 'Crystalina' flowers earlier than 'Caleb'. The inflorescence of 'Crystalina' is smaller than that of 'Caleb'.
Description:
PLANT: vegetatively propagated, shrub type, medium degree of branching, dense foliage
STEM: grey-brown mature shoot, light green young shoot, absent or very weak anthocyanin colouration, absent or very sparse pubescence, rounded with rough texture
LEAF: opposite arrangement, simple type
LEAF BLADE: obovate, acuminate apex, cuneate base, serrate margin, absent or very sparse pubescence on upper and lower sides, young leaf light green on upper and lower sides, mature leaf dark green on upper side, mature leaf medium green/grey on lower side, no variegation
PETIOLE: present, dense pubescence, yellow to light green
FLOWERING: short to medium period
PEDUNCLE: present, absent or very weak anthocyanin colouration, strong pubescence
INFLORESCENCE: dense, ovate bud, white (RHS 155A) bud
COROLLA: rotate and cupped
COROLLA LOBE: five, free, white (RHS 155B) on upper and lower sides
ANTHER: white
POLLEN: yellow
Origin & Breeding History: 'Crystalina' originated from an open pollinated cross between the female parent Clethra alnifolia 'Ruby Spice' and pollen from an unknown male parent conducted in 2003 at North Carolina State University, Mills River, North Carolina, USA. The new Clethra was a product of a formal breeding program developed by the breeder Thomas G. Ranney at North Carolina State Univerty. There were approximately 1,500 seedlings that resulted from the initial cross. 'Crystalina' was selected from these seedlings in 2006 based on growth habit, length of flower raceme and number of flowers per raceme. Asexual propagation by stem cuttings was first conducted in August 2006 in Mills River, North Carolina.
Tests & Trials: Trials for 'Crystalina' were conducted in an outdoor irrigated container trial during the summer of 2010, in St. Thomas, Ontario. The trial included a total of 15 shrubs each of the candidate and reference varieties. All shrubs were grown from 5.7 cm liners planted into 7.5 litre containers in May 2009. Observations and measurements were taken from 10 plants of each variety on July 13, 2010. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.
Comparison tables for 'Crystalina' with reference variety 'Caleb'
Plant width (cm)
| 'Crystalina' | 'Caleb' | |
|---|---|---|
| mean | 54.5 | 75.7 |
| std. deviation | 3.98 | 2.87 |
Time of flowering
| 'Crystalina' | 'Caleb' | |
|---|---|---|
| date | June 25, 2010 | July 9, 2010 |
Inflorescence diameter (cm)
| 'Crystalina' | 'Caleb' | |
|---|---|---|
| mean | 2.7 | 3.5 |
| std. deviation | 0.25 | 0.20 |
Click on image for larger view
Summersweet: 'Crystalina' (left) with reference variety 'Caleb' (right)
Click on image for larger view
Summersweet: 'Crystalina' (left) with reference variety 'Caleb' (right)
Click on image for larger view
Summersweet: 'Crystalina' (left) with reference variety 'Caleb' (right)
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