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2. Circular coloring - Wikipedia

   en.wikipedia.org/wiki/Circular_coloring

   In graph theory, circular coloring is a kind of coloring that may be viewed as a refinement of the usual graph coloring. The circular chromatic number of a graph , denoted can be given by any of the following definitions, all of which are equivalent (for finite graphs). is the infimum over all real numbers so that there exists a map from to a ...

3. Flower - Wikipedia

   en.wikipedia.org/wiki/Flower

   A flower, also known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). Flowers consist of a combination of vegetative organs – sepals that enclose and protect the developing flower. These petals attract pollinators, and reproductive organs that produce gametophytes, which in ...

4. Petunia - Wikipedia

   en.wikipedia.org/wiki/Petunia

   Petunia is a genus in the family Solanaceae, subfamily Petunioideae. Well known members of Solanaceae in other subfamilies include tobacco (subfamily Nicotianoideae), and the cape gooseberry, tomato, potato, deadly nightshade and chili pepper (subfamily Solanoideae). [2] Some botanists place the plants of the genus Calibrachoa in the genus ...

5. Dahlia - Wikipedia

   en.wikipedia.org/wiki/Dahlia

   In 1805, several new species were reported with red, purple, lilac, and pale yellow coloring, and the first true double flower was produced in Belgium. One of the more popular concepts of dahlia history, and the basis for many different interpretations and confusion, is that all the original discoveries were single-flowered types, which ...

6. Floral formula - Wikipedia

   en.wikipedia.org/wiki/Floral_formula

   A floral formula is a notation for representing the structure of particular types of flowers. Such notations use numbers, letters and various symbols to convey significant information in a compact form. They may represent the floral form of a particular species, or may be generalized to characterize higher taxa, usually giving ranges of numbers ...

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