1) Dolabrate 2) Simple 3) Unsubdivided 1) Dolabrate 2) Unsubdivided 
hatchet-shaped
resembling a hatchet or cleaver
• (a.) Shaped like the head of an ax or hatchet, as some leaves, and also certain organs of some shellfish.
Do·lab'ri·form adjective [ Latin dolabra a mattock + -form .] Shaped like the head of an ax or hatchet, as some leaves, and also certain organs of some shellfish. 
hatchet-shaped
[adj] - having the shape of the head of an ax or cleaver
dolabrate adjective having the shape of the head of an ax or cleaver
shaped like an ax or a cleaver.