Yunia

Yunia is a genus of extinct vascular plants from the Early Devonian. It was first described from the Posongchong Formation of Yunnan, China. The leafless plant consisted of spiny stems, some wide, which branched dichotomously at wide angles in a cruciate arrangement. Each stem contained vascular tissue with one or two strands of protoxylem. The spore-forming organs were elongated and borne on short stalks. The spores had a relatively smooth sculptural pattern and were trilete.
In 2004, Crane et al. published a simplified cladogram for the polysporangiophytes in which Yunia is basal to the lycophytes. It had previously been placed in the "trimerophytes", which were considered to have given rise to all the other vascular plants except the lycophytes.
Hao and Xue in 2013 considered the genus as a questionable zosterophyll.