No, oregano leaves are not waxy or slippery. They are velvety and soft like mint.
Yes, croton leaves are waxy to some degree.
oregano leaves
Harder the better. Waxy leaves minimize the loss of water by transpiration
The leaves of water hyacinth are smooth and waxy, with a slightly glossy texture.
For flavor
The waxy transparent layer of leaves prevents water evaporation.
The waxy substance that leaves are covered in is called cuticle. It helps to prevent water loss from the leaves and provides protection against pests and pathogens.
Lotus have waxy coating on the leaves to protect them from water.
Phyllotaxy is the arrangement of leaves on the stem. The leaves of Oregano are paired opposite to each other. Each pair is at right angles to the previous one. This type of arrangement of leaves is called whorled arrangement.
Leaves have a waxy layer on top of their epidermis layer called the cuticle. This waxy surface protects the leaves from sunburn, dessication (drying out) and reduces attacks by fungi, bacteria, virus particles and insects.
hairy leaves and stem
The waxy coat helps to reduce water loss from the leaves.