Aberlemnia is a genus of extinct vascular plants of the Early Devonian (around 420 to 390 million years ago), which consisted of leafless stems with terminal spore-forming organs (sporangia).

Plants consisted of smooth leafless stems (axes) up to 1.4 mm wide, decreasing in width at each branching.

[2] According to a review of the genus Cooksonia by Gonez and Gerrienne, the sporangium of the type species (C. pertoni) is formed by a widening of the end of a stem.

[1] In 2013, Hao and Xue classified Aberlemnia as a rhyniopsid, in the subgroup they called "renalioids", along with Renalia and Hsua.

[4] Gonez and Gerrienne consider that Cooksonia is the most basal of the stem group of the lycophytes, whereas their genus Aberlemnia diverged later and is more derived.