Patent Grant
PP17545
Latin name of genus and species: Rosa hybrida ‘JENtwelve.’
Variety denomination: The new variety is named ‘JENtwelve’.
The present invention constitutes a new and distinct variety of miniature rose plant, which was developed by artificially pollinating an unnamed seedling (not patented in the US) with an unnamed seedling (also not patented in the US). The two parents were crossed during the summer of 2001, and the resulting seed was sown in December 2001, in a controlled glasshouse environment. Out of the resulting seedlings one seedling was selected, as a distinct new variety and was named ‘JENtwelve.’ The variety can be distinguished from its seed parent, an unnamed seedling, by the following combination of characteristics:
JENtwelve has medium sized double flowers, while the unnamed seed parent has large sized single flowers;
JENtwelve has red colored petals, while the unnamed seed parent has orange-red petals.
The new variety may distinguished from its pollen parent, an unnamed seedling created by the same inventor, by the following combination of characteristics:
JENtwelve has smaller flowers and foliage as compared to the unnamed pollen parent;
JENtwelve has red colored petals, while the unnamed pollen parent has dark pink petals.
Initial asexual reproduction of JENtwelve by cuttings was first carried out by the inventor in Christiansfeld, Denmark. The asexual reproduction was conducted under controlled greenhouse conditions. Having thus demonstrated asexual reproduction it was found that all characteristics and distinctions came true to form and were established in succeeding propagations. JENtwelve is a low growing compact miniature rose with medium vigor.
The objective of the hybridization of this rose variety for commercial greenhouse culture was to create a new and distinct variety with:
This combination of qualities was not present in previously available commercial cultivars of this type and distinguishes JENtwelve from all other varieties of which the inventor is aware. The seeds from hybridization were planted in a controlled environment and evaluations were conducted on the resulting plants. JENtwelve was selected by Svend Jensen, in his development program in Christiansfeld, Denmark.
The accompanying color illustrations show as true as is reasonably to obtain in color photographs of this type, the typical characteristics of the buds, flowers, leaves, stems of ‘JENtwelve’. Specifically illustrated in:
Photo sheet # 1:
1 Young shoot;
2 Bud before opening of the sepals;
3 Bud at the stage of opening of the sepals;
4 Bud at the stage of opening of the petals;
5 Flower during course of opening;
6 Opening flower—plan view—obverse;
7 Opening flower—plan view—reverse;
8 Fully open flower—plan view—obverse;
9 Fully open flower—plan view—reverse.
Photo sheet #2:
10 Receptacle showing stamens and pistils;
11 Receptacle showing pistils (stamens and sepals removed);
12 Flower petals, detached—Inner surface;
13 Flower petals, detached—Outer surface;
14 Bare stem exhibiting thorns and flower attachment;
15 Leaf with three leaflets upper surface;
16 Leaf with three leaflets reverse surface;
17 Leaf with five leaflets upper surface;
18 Leaf with five leaflets reverse surface.
The following is a detailed description of the Miniature Rose: Rosa hybrida ‘JENtwelve’. The following observations, measurements, values and comparisons describe plants grown in glass houses in Christiansfeld, Denmark. The age of the observed plants was 11 to 13 weeks after propagation by cuttings and growth as flowering pot plants in 10 centimeter diameter containers. Environmental conditions during cultivation were a temperature range of 64-78 degrees Fahrenheit with a day length of 10 to 20 hours, light levels ranging from 600 to 6,000 foot candles and relative humidity ranging from 50% to 85%. The growth regulator paclobutrazol (Bonzi®) was used to modify the plant shape to make it more compact.
Color references are made by using The Royal Horticultural Society (London, England) Colour Chart 1995 except where common color descriptive terms are used. For a comparison, the nearest existing rose variety is Poultra005, a rose variety described and illustrated in U.S. Plant Pat. No. 13,801.
Chart I details several physical characteristics of JENtwelve versus Poultra005.
Production time is generally 11 to 13 weeks depending on average temperature, light level, and cultural practices.
| Number | Date | Country | |
|---|---|---|---|
| 20060218682 P1 | Sep 2006 | US |
