The file (not glass or sand-paper) must not be of the toothed kind, but grooved.
If not entire it may be toothed, serrate (sawlike), crenate or wavy.
The leaves are smooth, deeply cut, toothed, and half clasp the stem.
At the base of each leafstalk there is a pair of toothed stipules.
The upper leaves are entire and sessile, while the lower are toothed and stalked.
Some have smooth margins, but the typical leaf is toothed like holly.
They are very much cut up, and their edges are toothed like a saw.
Each leaf is divided into seven parts, which are toothed round the edges.
The seeds are very small, and each has a toothed, membranous wing.
The animal resembles the Anodon, but the shell presents a toothed hinge.