Rocklet

Saxifrage

Denomination: 'Rocklet'
Trade name: Touran Scarlet
Botanical Name: Saxifraga ×arendsii
Applicant/Holder: Syngenta Participations AG
Schwarzwaldallee 215
4058
Basel
Switzerland
Breeder: M. Gutter, Enkhuizen, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2007-02-19
Application Number: 07-5736
Grant of Rights Date: 2015-11-16
Certificate Number: 5142
Grant of Rights Termination Date: 2035-11-16

Variety Description

Variety used for comparison: 'Rockred' (Touran Deep Red)

Summary: When measured to the top of the flowers, the plants of 'Rocklet' are shorter than those of 'Rockred'. When newly open, the upper side of the petal on the flower of 'Rocklet' is dark purple red with yellow green at the base while that of 'Rockred' is dark purple red throughout. The petal of 'Rocklet' has a rounded apex with weak undulation of the margin whereas that of 'Rockred' has a broad acute apex with medium to strong undulation of the margin.

Description:

PLANT: erect growth habit, dense foliage

LEAF BLADE: alternate arrangement, simple, obovate, lobed margin, medium green on upper side, no anthocyanin colouration, petiole present

FLOWERING STEM: light green
INFLORESCENCE: raceme-like cyme
PETAL: elliptic, rounded apex, weak undulation of margin, margin is weakly reflexing along longitudinal axis
PETAL (UPPER SIDE): dark purple red (RHS 185A) with yellow green (RHS 2D) at base when newly open, purple (redder than RHS 59C) when fully open, blue pink (RHS 186C) with brown purple (RHS 186A) tones when aged
ANTHER: yellow before and after dehiscence
STYLE: yellowish-white before dehiscence

Origin & Breeding History: 'Rocklet' originated from a red flowering seedling, designated as 'D702', selected from Saxifraga x arendsii 'Purperteppich' by the breeder, M. Gutter, an employee of Syngenta Seeds B.V. in Enkhuizen, The Netherlands. The selection was made through three cycles of halfsib selection conducted from April 2001 through to March 2003. A single seedling was selected in March 2003 based on early spring flowering, a strong compact growth habit, free flowering and non-fading scarlet-red flower colour. The variety 'Rocklet' has been reproduced by vegetative cuttings in Enkhuizen, The Netherlands since March 2003.

Tests & Trials: The comparative trial for 'Rocklet' was conducted in a polyhouse during the spring of 2014 at BioFlora Inc. in St. Thomas, Ontario. The trial included 20 plants each of the candidate and reference variety. All plants were grown from rooted cuttings and transplanted into 12 cm pots on August 15, 2013. Observations and measurements were taken from 10 plants or parts of plants of each variety on March 30, 2014. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'Rocklet' with reference variety 'Rockred'

Plant height to top of flowers (cm)

  'Rocklet' 'Rockred'
mean 10.7 14.8
std. deviation 1.42 0.90

Colour of petal on newly open flower (RHS)

  'Rocklet' 'Rockred'
upper side 185A with 2D at base darker than 53A

Click on image for larger view
Rocklet
Saxifrage: 'Rocklet' (left) with reference variety 'Rockred' (right)

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Rocklet
Saxifrage: 'Rocklet' (left) with reference variety 'Rockred' (right)

Click on image for larger view
Rocklet
Saxifrage: 'Rocklet' (left) with reference variety 'Rockred' (right)

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