You are looking at the top of a perennial Lycopodium . The new growth is yellow-green. The Leaves are Microphylls and have a single Vascular Bundle that is connected to the Stele in the stem by Leaf Traces. The latter can be seen in the Cortex of the Stem. Stomata are present.
Some species are Isophyllous while others are Anisophyllous .
Leaves associated with Sporangia are called Sporophylls . These can be similar to vegetative leaves or they may be distinct. In some cases complex Gemmae are produced in place of leaves. Alpine plant with Gemmae - These could be handy in a challenging environment where the next Lycopodium could be on the opposite side of the valley . In some cases Complex Gemmae are produced in place of leaves.