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The most important rose cultivars bred by major breeders have code names as registration names. A code name or ICRAR code is a unique code, consisting of letters of the 26‑letter Roman alphabet, given to a new registered rose variety, to distinguish it from other varieties (cultivars) of roses.
Rosa banksiae Rosa persica. There are currently four subgenera in Rosa, although there have been some disputes over the years. [3] The four subgenera are: Hulthemia (formerly Simplicifoliae, meaning "with single leaves") containing one or two species from Southwest Asia, R. persica and R. berberifolia (syn. R. persica var. berberifolia) which are the only species without compound leaves or ...
The following is a selected list of rose varieties and cultivars which currently (2017) [1] hold the Royal Horticultural Society's Award of Garden Merit. [ 2 ] [ 3 ] List of roses
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After eight years of testing, Star Roses introduced the new rose into the United States in 2000 under the marketing name of 'Knock Out'. The extremely hardy rose cultivar was successful that first year, and has become one of America's top selling roses. 'Knock Out' is also the original rose variety of a large family of 'Knock Out rose varieties ...
Blooms are large, 4—5 in (10—12 cm) in diameter, high-centered in form with tough petals (26—40). Flowers are slow to open, and are borne singly on long stems, which makes them an excellent exhibition and cutting rose. The flowers are a clear white with an ivory reverse. The rose has a mild, sweet fragrance and large, dark green foliage.
Blooms are large, 4—5 in (10–12 cm) in diameter, with 12 to 15 petals. The plant bears small clusters of semi-double flowers with a flat to cupped bloom form. Buds are large, long and pointed. The flowers are a mauve blend with shades of lavender. The rose has a moderate, apple, fruity fragrance and large, semi-glossy, dark green foliage.
Flowers are red and white, with red edges and yellow stamens. [3] Blooms have a strong, fruity fragrance. 'Betty Boop' blooms in flushes from spring through fall, and is very disease resistant. The shrub has medium, glossy, dark green foliage. The plant thrives in a wide variety of climates; it tolerates rain, heat and cold very well. [2] [4]