Thaumatophyllum stenolobum is a mostly terrestrial aroid that develops a thick main stem anchored into the ground by aerial roots. The leaves are dark glossy green with prominent back lobes and a pointed tip. At maturity leaves can grow to several feet long. As the plant grows taller, lower leaves drop, leaving signature eye-like scars on the stem.
Once mature, looks like a cross between billietiae and hope selloum (see second photo for example of mature plant)