Yellow Ribbon, by Andrew Hudson, originally uploaded by Origami Weekly.

On the last Monday in May we in the U.S.A. celebrate Memorial Day. On this day we pay our respects to the brave men and women who have lost their lives serving this country. In honor of the occasion we at Origami Weekly present a yellow ribbon. The yellow ribbon serves as a small token of our support for our troops, and our wishes for them to return home safely. God bless our troops and God bless America.

Diagrams here: Yellow Ribbon

Fold a ribbon and show your support!

See you next time!

--Jared

For our viewers from other countries: the yellow ribbon does represent a similar sentiment in many nations. Also, if made from a different color, the same style ribbon has come to represent awareness of many other things, such as pink for breast cancer, or red for AIDS. Feel free to fold a ribbon for your cause, whatever it may be.

What is a flower? So simple a question would scarcely need an answer if flowers were only just as simple. Actually they are extremely complex and it would cater to the vanity of the sentimentalist if we could say they where created only for our enjoyment -- their alluring forms, their color and frequently their quite seductive odor. But such a concept is fantastically false. The true function of flowers is reproduction and nothing else, and upon the sex life of flowers our very existance depends. Without it there would be no weat or rice, no coffee or chocolate, no timber or cotton, no quinine or digitalis, and in a few years the earth would return to something like its reputed condition in the first chapters of Genesis.

In what does the sex life of flowers consist? Basically it is very like the reproduction process in man or any other animal. Male and female must be brought together at the proper time in order that fertilization may be completed to perpetuate the race.

How do flowers accomplish this? While the sex organs of flowers are their most essential organs, they do not usually stand naked and their arrangement within the flower is neither an accidental nor has nature left these delicate sex organs without proper protection. To understand their arrangement it is necessary to look at a typical flower rather carefully. Just the beneath the showy petals is a usually greenish envelope known as a calyx which is often divided into individual sepals. This calyx usually covers the flower while it is stil in bud, and even after the flowers opens is still the outer envelope of normal flowers. The next inner circle of organs comprise the petals, which are sometimes of seperate segments, as in a pink, but are quite often united to form a cup-shaped corolla, as in the lily-of-the-valley.

Within these outer envelopes of calyx and coralla are placed the sex organs. They consist, usualy of a central female organ, including an ovary, clustered around which are the male organs of stamens. These produce the familiar yellow "dust" which is the male fertilizing pollen. This, at the proper time, must be deposited upon the prolongation of the ovary (known as the style and stigma). This usually happens when the stigma is slightly sticky. What is called pollination is then completed, and the stage is set for the fertilization of the ovules. It is these fertilizied ovules (future seeds) within the ovary (the future fruit) that ensure the perpetuation of nearly all flowers.

Tesserassic Palm, originally uploaded by Origami Weekly.

Well, it's week 21, and we've got something really neat this time around. Gerwin Sturm designed a really neat new model, and was kind enough to send us the diagrams for it. This was created as an entry for the Origami Tessellations Design Challenge, and is one of the most thorough diagrams of a tessellation I think I've ever seen. Thank you Gerwin!

Diagrams are here.