On this page of Waldorfwatch there is a very interesting guide to the occult symbols which are apparently used to decorate anthroposophical Christmas trees.
[Rudolf Steiner Press, 1955]
Roger Rawlings explains their meanings;
A Waldorf Christmas tree can be unique. Usually, there are no electric lights on the tree, since in the Waldorf view modern technology is demonic. Instead, the tree may bear numerous candles, roses, and unusual. symbolic ornaments. Rudolf Steiner prescribed these ornaments; they embody esoteric Anthroposophical doctrines.
“The Roses, growing out of the green, are a symbol of the Eternal* … The square is the symbol of the fourfold nature of man; physical body, ether-body, astral body and ego.** The triangle is the symbol for Spirit-Self, Life-Spirit, Spirit-Man.** Above the triangle is the symbol for Tarok . Those who were initiated into the Egyptian Mysteries knew how to interpret this sign. They knew too, how to read the Book of Thoth, consisting of 78 leaves on which were inscribed all happenings in the world from the beginning to the end, from Alpha to Omega and which could be read if the signs were rightly put together … Above this symbol is the Tao — the sign that is a reminder of the conception of the Divine held by our early forefathers … [T]hese early forefathers of ours lived on the continent of Atlantis … Finally, the cosmic symbol of Man is the pentagram, hanging at the top of the tree. Of the deepest meaning of the pentagram we may not now speak. But it is the star of humanity, of evolving humanity; it is the star that all wise men follow, as did the Priest-Sages of old.” — Rudolf Steiner, THE FESTIVALS AND THEIR MEANING, “Signs and Symbols of the Christmas Festival” (Rudolf Steiner Press, 1955), GA 96.
If you see a Christmas tree decorated this way in a Waldorf school, you may want to pause and reflect.
* Roses are the key symbol in Rosicrucianism, the occult path that Steiner said is correct for modern humans. [See “Rosy Cross”.]
** These are components of human nature, according to Anthroposophical doctrine. [See “What We’re Made Of”.]
I have never seen such a tree myself, I do not move in the right circles.