Ausbaker

Rose

Denomination: 'Ausbaker'
Trade name: Teasing Georgia
Botanical Name: Rosa
Applicant/Holder: David Austin Roses Limited
Bowling Green Lane
Wolverhampton
Albrighton
WV7 3HB
United Kingdom
Breeder: David Austin, David Austin Roses Limited, Albrighton, United Kingdom
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2000-01-04
Application Number: 00-2110
Grant of Rights Date: 2001-10-17
Certificate Number: 1053
Grant of Rights Termination Date: 2019-10-17

Variety Description

Variety used for comparison: 'Ausgold'

Summary: 'Ausbaker' has an arching growth habit while 'Ausgold' has an upright to bushy growth habit. 'Ausbaker' has red thorns while 'Ausgold' has greenish-brown thorns. 'Ausbaker' has five leaflets while 'Ausgold' has seven. 'Ausbaker' has slightly lighter yellow flowers than 'Ausgold'.

Description:

'Ausbaker' is a large English shrub rose. The growth habit is arching. The young shoot has medium anthocyanin which is reddish-brown in colour. Thorns and prickles are present on the stem and are deep concave in shape. There is a sparse number of short prickles and an average number of long prickles on the stem. Prickles and thorns are red in colour. 'Ausbaker' has dark green leaves which have weak glossiness. There are five leaflets. The terminal leaflet has a serrate margin, a leathery texture and rounded base.

'Ausbaker' flowers mid-season. There are two flowering periods with more than ten weeks duration. There is a low number of flowers per shoot. The pedicel has a small number of prickles. The flower bud is pointed in shape just before opening and sepal extensions are weak. The fully opened flower is irregularly rounded when viewed from above. When viewed from the side the flower is flat on the upper part and flattened convex on the lower part. The flower centre is a quartered-rosette. 'Ausbaker' has a very double flower type. The flower colour is in the medium yellow classification group. 'Ausbaker' has a medium sized petal spot at the base of the outer and inner side. There is medium reflexing and weak undulation of the petal margin. 'Ausbaker' has a yellow filament. The style is long in length, yellow-green in colour and weak in hairiness. The stigma is positioned above the anthers. The receptacle is small in size, pitcher shaped and has no prickles. The flower has tea fragrance which is medium in intensity.

Origin & Breeding History: 'Ausbaker' originated from a cross between two English rose varieties which took place at David Austin Roses, Albrighton, United Kingdom in 1987. The variety was selected for its attractive yellow flowers, old-fashioned flower shape, good fragrance and disease resistance.

Tests & Trials: Trials for 'Ausbaker' were conducted at Valderose Garden, Pain Court, Ontario. The trials consisted of 10 plants per variety planted outdoors. Measured characteristics were based on ten measurements.


Comparison tables for 'Ausbaker' with reference variety 'Ausgold'

Colour of flower bud (one-quarter open) (RHS)

  'Ausbaker' 'Ausgold'
upper surface 10B 24B
lower surface 12A 16B

Flower colour (RHS)

  'Ausbaker' 'Ausgold'
overall colour 13A 12B

Colour of outer side of petal (RHS)

  'Ausbaker' 'Ausgold'
margin 4D 11B
middle zone 8D 10A
base 9A 9A

Colour of inner side of petal (RHS)

  'Ausbaker' 'Ausgold'
margin 4D 15D
middle zone 5D 12B
base 9A 9A

Petal width (mm)

  'Ausbaker' 'Ausgold'
mean 31.7 19.6
std. deviation 5.1 3.6
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