Patent Grant
PP17844
Latin name of genus and species: Rosa hybrida ‘JENfour’.
Variety denomination: The new variety is named ‘JENfour’.
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 (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 ‘JENfour’.
The variety can be distinguished from its seed parent, an unnamed seedling, by the following combination of characteristics:
The new variety may distinguished from its pollen parent, an unnamed seedling created by the same inventor, by the following combination of characteristics:
Initial asexual reproduction of ‘JENfour’ by cuttings was first carried out by the inventor in Christiansfeld, Denmark. The reproduction was conducted under controlled greenhouse conditions. Having demonstrated asexual reproduction it was found that all characteristics and distinctions came true to form and were established in succeeding propagations. ‘JENfour’ is a low and 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 distinguish ‘JENfour’ from all other varieties of which the inventor is aware. The seeds from the stated hybridization were planted in a controlled environment and evaluations were conducted on the resulting plants. ‘JENfour’ was selected by Svend Jensen, in his development program in Christiansfeld, Denmark.
The accompanying color illustrations show as true as is reasonable to obtain in color photographs of this type, the typical characteristics of the buds, flowers, leaves, stems of ‘JENfour’. Specifically illustrated in:
FIG. 1: Young shoot.
FIG. 2: Bud before opening of the sepals.
FIG. 3: Bud at the stage of opening of the sepals.
FIG. 4: Bud at the stage of opening the petals.
FIG. 5: Flower during course of opening.
FIG. 6: Open flower—plan view—obverse.
FIG. 7: Open flower—plan view—reverse.
FIG. 8: Fully open flower—plan view—obverse.
FIG. 9: Fully open flower—plan view—reverse.
FIG. 10: Receptacle showing stamens and pistils.
FIG. 11: Receptacle showing pistils (stamens and sepals removed).
FIG. 12: Flower petals, detached—inner surface.
FIG. 13: Flower petals, detached—outer surface.
FIG. 14: Bare stem exhibiting thorns and flower attachment.
FIG. 15: Three leaflets upper side.
FIG. 16: Three leaflets reverse side.
FIG. 17: Five leaflets upper side.
FIG. 18: Five leaflets reverse side.
The following is a detailed description of the Miniature Rose: Rosa hybrida ‘JENfour’.
The following observations, measurements, values and comparisons describe plants grown in glass houses in Christiansfeld, Denmark. The age of the observed plants were 11 to 13 weeks after propagation by cuttings, and growth as a flowering pot plant in container of 10 centimeters diameter.
Environmental conditions in the cultivation area for the observed plants ranged from 64 to 78 degrees Fahrenheit with and 10 to 20 hours of light per day. Light levels ranged from 600 foot candle to 6000 foot candles. The relative humidity ranged from 50 to 85%. Bonzi brand growth regulator (R′,R′-beta-[(4-chlorophenyl)methyl]-alpha(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol) was used to modify the plant shape.
Color references are made using The Royal Horticultural Society (London, England) Colour Chart, 1995, except where common terms of color are used.
For a comparison, the nearest existing rose variety is ‘POULfiry’, a rose variety described and illustrated in U.S. Plant Pat. No. 12,484.
Chart 1 details several physical characteristics of ‘JENfour’ and ‘POULfiry’.
Production time is generally 11 to 13 weeks depending on average temperature, light level, and cultural practices.
Leaves arranged alternately, compound with 3 to 7 leaflets per leaf, generally symmetrical, abundant, and flat in aspect. Stipules at petiole base.
Winter hardiness & drought/heat tolerance have not been systematically observed evaluated because the variety is a potted flowering plant, developed for a one time use only.
| Number | Date | Country | |
|---|---|---|---|
| 20070006353 P1 | Jan 2007 | US |
