Adoketophyton is a genus of extinct vascular plants of the Early Devonian (Pragian stage, around 410 million years ago).

[4][6] Like other Early Devonian plants, the sporophyte of Adoketophyton consisted of leafless stems (axes), approximately 1 to 2.5 mm in diameter.

Its vascular tissue was relatively simple, consisting of a central (centrarch) cylinder of primary xylem with G-type tracheids.

Fossils suggest that stems which did not bear sporangia initially had coiled (circinnate) tips, consistent with other "zosterophylls", and similar to the way in which modern ferns grow.

[2] A cladogram published in 2004 by Crane et al. places Adoketophyton in a paraphyletic stem group of broadly defined "zosterophylls", basal to the lycopsids (living and extinct clubmosses and relatives).