'Holland Red'
"Dionaea ' Holland Red ' M.Erbacher & M.Stoeckl grows like the nominate form. This plant follows the already described annual cycle. The plant starts in spring with the first set of prostrate leaves with short petioles, after flower these are followed by long petiolate mid-summer leaves, to form the last set of wider short petiolate winter leaves in late summer or autumn. The leaf rosette reaches a diameter of ca. 10 cm and individual traps may attain a size of up to ca. 3 cm. The red colouration of the leaves depends, however, strongly on light conditions. Only plants exposed to full sunlight colour more or less intensely red or red-brown. In winter the plants frequently get green leaf margins or even whole plant portions that do not receive sufficient light remain dark green. As soon as the plants are exposed to more intense sunlight, the colour begins to change to typical again." Taublatt 51:21 (2005) (in German)
From : https://cpnames.carnivorousplants.org/Cultivars.php?name=Dionaea
Note: one of my first plants, relatively "simple", and yet I still find it fascinating.