Lesser Periwinkle Vinca minor compared to Greater Periwinkle Vinca major. Sketchbook study sheet shows details of flowers, leaves, leaf venation, a habit sketch, and cross sections of the periwinkle flowers.
Common Blue-sow thistle Cicerbita macrophylla sketchbook page compared to Alpine Sow-thistle Cicerbita alpina. Details of leaf venation, habit sketch, individual ray florets, seed information, and associated comparative details of the Alpine Sow-thistle