Which early Devonian plants are among the earliest known lycophytes?

Among the earliest known lycophytes are the genera Baragwanathia and Protolepidodendron, both of which date from the early Devonian Period.12

These plants were small, herbaceous organisms. Baragwanathia is particularly notable for having true leaves with a single strand of vascular tissue and sporangia arranged in zones along the stem, features that link it to both ancient and modern club mosses. While Baragwanathia is well-documented in early Devonian deposits, its fossil record extends back to the Late Silurian Period, suggesting that lycopsids were among the first lineages of land plants to develop true leaves and tracheids.13