Rose plant--Carola
United States Patent PP08290

A rose plant exhibiting good resistance to powdery mildew, and being characterized by nonfragrant flowers, very high crop, good self-rooting and high stem break forth.

Carmel, Carmi (Moshav Hayogev, IL)
Application Number:
Publication Date:
Filing Date:
Yuval Agricultural Products Ltd. (IL)
Primary Class:
International Classes:
A01H5/02; (IPC1-7): A01H5/00
Field of Search:
Plt/20, Plt/19, Plt/21
View Patent Images:
US Patent References:
4724276Process for altering poinsettia growth characteristics1988-02-09Ecke, Jr.47/58
PP04391Rose plant-Deladel1979-03-06DelbardPlt/20

Foreign References:
FR855AJune, 1978
Other References:
Haring P. A. (Ed.) Modern Roses 9, Amer. Rose Society, 1986, p. 181.
Primary Examiner:
Feyrer, James R.
Attorney, Agent or Firm:
Pollock, Vande Sande & Priddy
Parent Case Data:

This application is a continuation application of application Ser. No. 07/387,837, filed Aug. 1, 1989, now abandoned.

I claim:

1. A new and distinct variety of rose plant of a hybrid tea rose, variety, named Carola, as shown and described, and consisting mainly of plants being vigorous growing, showing a large flower bud, containing a large number of petals, having nonfragrant with petals with a medium-sized white spot at their base, with early and prolific flower production, and having fast and good propagating features.



The present invention is concerned with a new variety of hybrid tea rose discovered by me and being a mutation of Deladel (U.S. Plant. Pat. No. 4,391, dated Mar. 6, 1979), Madame G. Delbard variety.


The mutation was first discovered on a cultivated area, in a farm located in South America, at an altitude of about 2,400-2,500 meters above sea level, with average night temperature of 5-8 degrees centigrade, and day temperature of 5-18 degrees centigrade.

Plants were grown in a green-house, and then brought to Israel, where they were vegetatively propagated by selfrooting of cuttings.

Asexual reproduction of this new cultivar as performed at Yuval Agriculture Products at Moshav Ha'Yogev shows that the foregoing characteristics and distinctions came true to form and are established and transmitted through succeeding propagations.

The resulting plants were found to be stable in their botanical characteristics, as are described below and in the attached drawing.

The following is a description of the characteristics of my new rose cultivar which distinguish it from cultivars of which I am aware and especially from Madame G. Delbard (Deladel):

1. Better branching.

2. Larger flower bud.

3. Distinct larger number of petals.

4. Larger sepals with larger extensions.

5. More water shoots, than the original plant.

6. Good grafting compatibility on Rosa indica L.


The first sheet of the drawing depicts buds of the claimed plant in various stages of opening; the characteristic shape and foliaceous appendages of the sepals are shown along with the high-centered character of the buds themselves. The coloration of the other surfaces of the petals at this stage of opening is also depicted.

The second sheet of drawing shows, in comparison, two petals of Carola, designated as A at the top of the drawing, and petals of comparable stage of maturity as taken from the parent variety "Deladel", labelled B, at the bottom of the drawing. This sheet of drawing also depicts the typical difference in size of the petals taken from the mutation as compared to the parent variety; and, also shows the difference in the size of the spot at the point of petal attachment; that of the parent "Deladel" being much smaller in the comparison; and the difference in coloration; that of the sport being clear white while that of the parent being light yellow in color.


The following is a detailed description of my new rose cultivar with color in terminology in accordance with Royal Horticultural Society of London, England (R.H.S.) Colour Chart except where ordinary dictionary significance of color is indicated.

The plant originated from a mutation of Madame G. Delbard.

The following description is based on observations made in Moshav Ha'Yogev, Israel, in a greenhouse:

Plant growth habit upright Older stem corky1 Young shoot anthocyanin strong coloration hue of anthocyanin purple coloration Prickles present Prickle shape of upper straight sides shape of lower side concave Short prickles number few Long prickles number few Leaf size length 140-170 mm width 110-150 mm green color medium to dark glossiness of upper absent or very weak side Leaflet cross section slightly convex undulation of absent or very weak margin Terminal leaflet length of blade ca. 60 mm maximum width ca. 35 mm length of petiole ca. 20 mm shape of base rounded Flowering shoot number of flowers few Flowering habit continuous Flower pedicel number of hairs or few prickles Flower bud longitudinal circular to ovoid section Flower type double number of petals 33-40 diameter ca. 110 mm view from above rounded to star- shaped side view of upper flattened-convex part side view of lower flat part fragrance none Sepal length 40-55 mm extensions strong Petal size length 50-60 mm width 55-65 mm shape rounded color of middle RHS 53-A dark red zone of inner side (according to the Royal Horticultural Society Color Chart) color of marginal RHS 53-A dark red zone of inner side spot at base of present inner side size of spot at medium (length of base of inner side spot on the upper side of the petal was 8-10 mm color of spot at white (RHS 155-D) base of inner side color of middle RHS 53-C dark red zone of outer side color of marginal RHS 53-C dark red zone of outer side spot of base of present outer side size of spot at very small to small base of outer side color of spot at white base of outer side reflexing of margin strong undulation of weak margin Stamen predominant color purple of filament length long predominant color purple hairiness of upper medium half position as above compared with anthers size medium shape of pitcher shaped longitudinal section

1 Typical for hybrid tea roses.

The time of beginning of flowering is early.

The average number of petals per flower: 33-38.

The bud size at time of picking is 5-6 cm long, and 3 cm in diameter.

The number of side shoots per flowering branch is 5-6.

The annual produce is 150-160 flowers per square meter.

Flowering stem medium green, 70-80 cm long with an average of 13 leaves.

The vase life is up to 15 days, under condition of room temperature.

Average number of water shoots, in 1st year after planting 4-6.

Prickles, per internode -- 2-3.

Prickles up to 3rd leaf -- 1.

Number of leaflets per leaf -- 5-7.

Budding sprout -- 8-9.

Fragrance -- none.

Plant's height in 8 months after planting 170-180 cm.

Time from planting to commercial flower production 6-8 months.

Good resistance to Rose Powdery Mildew.

Exhibits high stem break forth, very high crop and good self-rooting.

Under condition of room temperature flower opening proceeds

Under condition of room temperature flower opening proceeds slowly.

The variety should be grown under glass.

Comparison Of Production Characteristics Between The New Variety "Carola"

and Variety "Deladel"

Observations made in Ecuador from commercial plantings during 1988-1990, where the two varieties were grown side by side, under the same conditions and same age, were both self-rooted and with the same planting time. Each one 10,000 square meters of plants.

Carola Deladel

Average number of petals
33-38 18-25
Average number of cut flowers
1.85-2.00 0.90-1.25
per plant per month (year
round production)
Average number of water-
4-6 2-3
shoots in first year after
Plant height in 8 months
170-180 cm 80-90 cm
after planting
Size of spot at base of inner
medium very small
Color of spot at base of
white yellow
inner side of petal
(RHS 155-D)
Fragrance of flower
none slight, not
sweet or spicy
Time from planting to
6-8 months 10-12 months
commercial flower production
Grafting compatibility on
very good very poor
Rosa indicia L. (about 65%

The size of the spot was, for the variety `Carola` defined

as: size of spot at base of inner side of petal-medium, and size of spot at base of outer side of petal-very small to small, using the sketch of the Test Guidelines for Rose of the Union for Protection of New Plant Varieties (document TG/11/4)-applying the following calculation: [1+{(average length of spot/average length of petal)-1}]/(35-1)*8

With lower value of length of spot 1 mm, and higher value of length of spot 35 mm.

Statistical Analysis For Additional Observations Made In Ecuador In Order

To Compare Carola With Deladel
Carola Deladel

Number of petals:
standard deviation 7.77 3.92
mean 32.05 22.35
Plant height in 8 months:
standard deviation 0.13 0.10
mean 1.97 1.50
Basal shoots:
standard deviation 1.48 0.67
mean 3.00 1.32
Flowers per plant:
standard deviation 0.53 0.48
mean 1.76 1.17

In all tests of the examined characteristics, the conclusion was that the population differ with a high level of significance.

Comparison Of Production Characteristics Between The New Variety Odem And

Variety Carola

The new variety Odem is a variety that was subsequently discovered and is a spot of Carola. They differ as described below:

Odem Carola

Average number of petals
39-48 33-38
Size of petal
length 37-45 mm 50-60 mm
width 39-49 mm 55-60 mm
diameter ca. 80 mm ca. 100 mm
color of upper side
RHS 46-AB RHS 53-A
Petal's reflexing medium strong
Size of spot at base of inner
small medium
side of petal
Color of spot at base of inner
yellow white
Length of flowering stem
50-70 cm 70-90 cm
Thickness of flowering stem
medium thick
Number of flowering stems per
about double
plant per year as for