A page from the facsimile edition of Burne-Jones' Flower Book, one of 38 watercolour designs reproduced by Henri Piazza et Cie, for the Fine Art Society, London in 1905.
Uerscheln has identified the flower as biting stonecrop (Sedum acre), but my recent research has listed 'love in a tangle' as a common name for peacock moss (Selaginella uncinata).
Between 1861-63, Burne-Jones created three paintings of Fair Rosamond, inspired by a trip through the Hampton Court maze in 1860. Similar motifs are found in: 'Eleanor & Rosamond' (Private Collection, 1861); 'Eleanor & Rosamond' (Tate, 1862); and 'Rosamond' (Private Collection, 1863), with just the figure of the girl. Rosamond Clifford, mistress of Henry II, was hidden away in a castle at Woodstock, the ruins of which Burne-Jones had explored while a student in nearby Oxford.