Selaginella willdenowii is a species of spikemoss, a type of primitive vascular plant that belongs to the family Selaginellaceae. It is commonly known as peacock spikemoss or Willdenow’s spikemoss because the leaves are blue iridescent leaves in the right conditions. This species is native to Southeast Asia and is found in countries such as Indonesia, Malaysia, Singapore, and Thailand.

Selaginella willdenowii is a small, creeping plant that grows up to about 15 centimeters in height. It has branching stems that are covered with small, needle-like leaves, arranged in a spiral pattern. The leaves are typically green, but can sometimes have a bluish or silvery tint. The plant produces small, spore-bearing structures called strobili, which are typically pinkish-red in color.