horneophyton

from the GNU version of the Collaborative International Dictionary of English.

• noun A genus of Devonian fossil plants considered one of the earliest forms of vascular land plants; it is similar to genus Rhynia but smaller.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun Devonian fossil plant considered one of the earliest forms of vascular land plants; similar to genus Rhynia but smaller