The Rose Cross is associated with a number of different schools of thought, including that of the Golden Dawn, Thelema, the OTO, and the Rosicrucians (also known as the Order of the Rose Cross). Each group offers somewhat different interpretations of the symbol. This should not be surprising as magical, occult and esoteric symbols are frequently used to communicate ideas more complex than is possible to express in speech.
This specific version of the Rose Cross is described in The Golden Dawn by Israel Regardie.
For the full article, please check out The Rose Cross.