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A rose with four petals. In mathematics, a rose (also known as a bouquet of n circles) is a topological space obtained by gluing together a collection of circles along a single point. The circles of the rose are called petals. Roses are important in algebraic topology, where they are closely related to free groups.
The rose family is considered one of the six most economically important crop plant families, [37] and includes apples, pears, quinces, medlars, loquats, almonds, peaches, apricots, plums, cherries, strawberries, blackberries, raspberries, sloes, and roses. Many genera are also highly valued ornamental plants.
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 rosids are members of a large clade (monophyletic group) of flowering plants, containing about 70,000 species, [2] more than a quarter of all angiosperms. [3] The clade is divided into 16 to 20 orders, depending upon circumscription and classification. These orders, in turn, together comprise about 140 families. [4]
Rosales (/ r oʊ ˈ z eɪ l iː z /, roh-ZAY-leez) [5] are an order of flowering plants. [6] Well-known members of Rosales include: roses, strawberries, blackberries and raspberries, apples and pears, plums, peaches and apricots, almonds, rowan and hawthorn, jujube, elms, banyans, figs, mulberries, breadfruit, nettles, hops, and cannabis.
Many everblooming roses are commonly grown in Louisiana, including hybrid tea, Grandiflora and shrub roses, and will benefit from being pruned in late August and early September.
This is the category of the genus Rosa, the Roses, including all species and cultivars. ... Rosa (plant) Rose * List of Rosa species; A. Rosa abietina; Rosa abrica;
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