From the Australian patent:
ROSE
Rosa

Variety: ‘Meigronurisar’ synonym ‘Climbing Gold Bunny’
Application No. 1991/107
Application Received: 23 September 1991
Applicant: SNC Meilland et Cie, of Antibes, France
Australian Agent: Ross Roses, of Willunga, South Australia

Description – see comparison tables
‘Meigronurisar’ is a medium sized climbing rose. Flowers are produced in a cluster habit and flowering is remontant. This variety has medium size leaves. The terminal leaflets are medium green in colour, concave in cross section, round at the base and glossy on the upper side. The leaflet margin is strongly undulating. Stem thorns are catena on the upper side and concave on the lower. The pedicel is smooth. The double flower has many petals (26-50). Flowers are produced from ovate buds and are medium yellow in colour (RHS 9B-C). Petals are mildly reflexed and show distinct undulation. Sepals have weak extensions. Stamens are yellow and the style is yellow/green. The seed vessel is medium sized and pitcher shaped.

Origin
‘Meigronurisar’ is a medium sized climbing rose. Flowers are produced in a cluster habit and flowering is remontant. This variety has medium size leaves. The terminal leaflets are medium green in colour, concave in cross section, round at the base and glossy on the upper side. The leaflet margin is strongly undulating. Stem thorns are catena on the upper side and concave on the lower. The pedicel is smooth. The double flower has many petals (26-50). Flowers are produced from ovate buds and are medium yellow in colour (RHS 9B-C). Petals are mildly reflexed and show distinct undulation. Sepals have weak extensions. Stamens are yellow and the style is yellow/green. The seed vessel is medium sized and pitcher shaped.

Origin
‘Meigronurisar’ is a sport of the bush form of ‘Meigronuri’ (‘Gold Bunny’). Subsequent plants were obtained from cuttings. It was selected by SNC Meilland et Cie.

Comparator
‘Meigronuri’ (‘Gold Bunny’), the bush form of ‘Meigronurisar’.

Comparative Trial
The trial was conducted at Willunga, South Australia in open beds in a loam clay soil. Plants were propagated from cuttings in February 1990 and planted out in June 1991. Mulch was applied in September 1991 and pest and disease treatments were applied as required. Seven plants of ‘Meigronurisar’ and five of ‘Meigronuri’ were planted in separate rows with 880mm between plants.

Prior Applications and sales

Country Year Status Name Applied
France 1990 Pending Meigronurisar
Rep South Africa 1990 Pending Meigronurisar
Italy 1991 Pending Meigronurisar

‘Meigronurisar’ has been sold in France in 1990.

Description prepared by Kim Syrus of Ross Roses, Willunga SA.

Table of Comparison of Rose Varieties
(* = comparator)

‘Meigronurisar’ *’Meigronuri’
(‘Climbing Gold Bunny’) (‘Gold Bunny’)

PLANT GROWTH TYPE
climber bush

TERMINAL LEAFLET LENGTH (mm)
mean 46.7 60.7
range 78-102 84-102
std. deviation 7.93 5.18

TERMINAL LEAFLET WIDTH (mm)
mean 28.0 34.7
range 18-37 26-40
std. deviation 3.64 4.02

FLOWER COLOUR GROUP
medium yellow medium yellow

PETAL COLOUR – RHS Number
midzone outside 9C 9C
midzone inside 9C 9C
margin outside 9B 9B
margin inside 9A 9A

NUMBER OF PETALS 26-50 26-50

FLOWER DIAMETER (mm)
mean 90.7 92.8
range 78-102 84-102
std. deviation 5.63 5.49

PETAL REFLEXING
mild mild

STAMEN FILAMENT COLOUR
yellow yellow

STYLE COLOUR yellow/green yellow/green

It doesn't have a lot of thorns, but some. I think this is the prettiest and healthiest yellow climber I have ever had. The blooms are beautiful for cutting. It doesn't have any disease or insect problems.