House of York basis. Edward Plantagenet became Edward IV in 1461, thus merging the title of Duke of York with the crown. The most popular symbol of the house of York was the White Rose of York. The Yorkist rose is white in colour, because in Christian liturgical symbolism, white is the symbol of light, typifying innocence and purity, joy and glory. During the civil wars of the fifteenth century, the White Rose was the symbol of Yorkist forces opposed to the rival House of Lancaster. The red rose of Lancaster would be a later invention used to represent the House of Lancaster,
Rose is a rose is a rose is a rose the rose is red for the first time in English poetry for a hundred years." ("Four in America"). She herself said to an audience at Oxford University that the statement referred to the fact that when the Romantics used the word "rose", it had a direct relationship to an actual rose. For later periods in literature this would no longer be true. The eras following romanticism, notably the modern era, use the word rose to refer to the actual rose, yet they also imply, through the use of the word, the archetypical elements of the romantic era. The following lines