Clematis plant named ‘Snow Valley’

Details Clematis plant named ‘Snow Valley’ Clematis plant named ‘Snow Valley’

2002-09-11

2004-07-27

Campell, Bruce R. (Department: 1661)

Plants

Shrub or vine

Clematis

Plant Patent

active

PP015031

ABSTRACT:

Genus: Clematis.
Species:
cartmanii.
Denomination: Snow Valley.
BACKGROUND OF THE INVENTION
The present invention relates to a new and distinct cultivar of Clematis that is grown for use as a sub-shrub for the landscape. The new cultivar is known botanically as a
Clematis×cartmanii
and will be referred to hereinafter by the cultivar name ‘Snow Valley’.
‘Snow Valley’ resulted from a formal breeding program. The inventor bred ‘Snow Valley’ in 1994 by induced hybridization between the pollen parent Clematis ‘Avalanche’ (unpatented) and the seed parent Clematis ‘White Cascade’ (unpatented). The cross was conducted in a cultivated area of Hampshire, England and ‘Snow Valley’ was selected based on the criteria of compact habit and female sexuality. ‘Snow Valley’ is a hybrid and exhibits short internodes and a profusion of cream-white flowers, along with finely dissected green foliage with grey-purple markings.
The closest comparison plant is
Clematis×cartmanii
‘Early Sensation’ (unpatented). ‘Snow Valley’ is distinguishable from the comparison plant by its pronounced compact habit. At maturity ‘Snow Valley’ is 0.3 meters in height and 0.5 meters in width. ‘Snow Valley’ differs from the parent plants ‘Avalanche’ and ‘White Cascade’ in vigor, internode length, finely dissected leaves, and flower size. ‘White Cascade’ and ‘Avalanche’ grow 10-16 cm. in a season. ‘Snow Valley’ is less vigorous, growing 5-6 cm. in a season. The internode length of ‘Snow Valley’ is 3-4 cm. This is less than ‘White Cascade’ and ‘Avalanche’, which exhibit internodes that are 10-16 cm. in length. The leaves of ‘Snow Valley’ are finely dissected. ‘Snow Valley’ exhibits flowers that are 3-4.25 cm. in diameter, whereas ‘Avalanche’ exhibits flowers that are 7-8 cm. in diameter and ‘White Cascade’ exhibits flowers that are 5.50-7 cm. in diameter.
The first asexual propagation of ‘Snow Valley’, was accomplished by the inventor, in 1997 in a cultivated area of Hampshire, England. The method of propagation used was semi-ripe nodal stem cuttings. Since that time, under careful observation, the distinguishing characteristics have been determined stable and uniform and true to type in successive generations.
SUMMARY OF THE INVENTION
The following represent the distinguishing characteristics of the new Clematis cultivar ‘Snow Valley’. In combination these traits set ‘Snow Valley’ apart from all other existing varieties of Clematis known to the inventor. ‘Snow Valley’ has not been tested under all possible conditions and phenotypic differences may be observed with variations in environmental, climatic, and cultural conditions, however, without any variance in genotype.
1. Clematis ‘Snow Valley’ is an evergreen sub-shrub.
2. Clematis ‘Snow Valley’ produces female flowers.
3. Clematis ‘Snow Valley’ exhibits a compact habit.
4. Clematis ‘Snow Valley’ exhibits finely dissected green foliage with grey-purple markings.
5. Clematis ‘Snow Valley’ exhibits short internodes.
6. Clematis ‘Snow Valley’ produces a profusion of cream-white flowers in spring.
7. Clematis ‘Snow Valley’ is 0.30 meters in height and 0.50 meters in width at maturity.

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