Ikebana room decoration and commenced in a rudimentary way to consider natural beauty in floral arrangement. At this time "ikebana" was known as "rikka". This same age conceived another form called "nageirebana". "Rikka" and "nageirebana" are the two branches into which "ikebana" has been divided. Popularity of the two styles vacillated between these two for centuries. In the beginning, "rikka" was stiff, formal, and more decorative while "nageirebana" was simpler and more natural. Although "nageirebana" began to come into favour in the Higashiyama period, "rikka" was still preferred, and "nageirebana" did not truly gain popularity until the Momoyama period, about a
English writing style works are noted in a uniform way. Typically, students are encouraged to use a style commonly adopted by journals publishing articles in the field of study. The list of "Style Manuals & Guides", from the University of Memphis Libraries, includes thirty academic style manuals that are currently in print, and twelve that are available on-line. Citation of referenced works is a key element in academic style. The requirements for writing and citing articles accessed on-line may sometimes differ from those for writing and citing printed works. Some of the details are covered in "The Columbia Guide to Online Style". English