The leaves of Venus Flytrap (Venus Flytrap) grow from the center, which are whorled leaves, and grow in clusters in a prominent sitting shape. The petiole is the part that grows out of a flat or thin line that looks like a wing in the center. The petiole of the native species is flat like a leaf, but because it looks like a leaf, it is also called a false leaf.
There is an insect trap at the end of the petiole. This is the part of the leaf that catches insects. There are many sessile glands on the front, usually red or orange. The closer the leaf is to the green, the fewer sessile glands. Part of it is the part that secretes digestive juice to break down insects or absorb nutrients from insects. Chlorophyll has tooth-like bristles. The base of the bristles has secretory glands that secrete mucus. The role is to prevent insects from breaking away and sticking to leaf petals. This kind of leaf has the special function of catching insects, and has a special appearance, which belongs to the "insect catching leaf" among abnormal leaves.
Because the new leaves are all produced from the center, the outer leaves are older. Sometimes new lateral buds are formed at the base of the outermost petiole. There are two types of Venus flytrap petioles. Some Venus flytraps have slender petioles up to 7-16 cm long and extend towards the air; some flytraps have short and fat petioles and are spread flat on Surface. The inside of the insect trap usually shows a red color. These colors are mostly the pigments of the digestive glands. When the plant can receive sufficient sunlight, it will promote the production of plant pigments. These colors range from orange-red to red-purple, and some are artificial. The Venus flytrap even produces pigment outside the digestive glands, which makes the entire plant red.