Puzzle initials with flower motifs from BL Burn 355, f. 1

Puzzle initials 'D'(eclaratio) and 'S'(icut) decorated with flower motifs in the bowls of the letters and around the 'D', at the beginning of the preface of Dionysius of Ruremunda to Cassian's De institutis coenobiorum. Image taken from f. 1 of De institutis coenobiorum, in the version of Dionysius of Ruremunda (Denys the Carthusian), with preface of Dionysius; Collationes, with list of chapters. Written in Latin.