ARAUCARIACEAE. Large trees. Both male and female cones rather large. Microsporophylls with numerous long, narrow, pendulous pollen sacs. Megasporophylls numer ous, simple and bearing solitary ovules embedded in the tissue. Nucellus extending beyond the integument. Prothallus with separate scattered archegonia, usually more or less lateral. Several prothallial cells in the pollen grain. Tracheids with multiseriate pitting.
*Dioecious. Megasporophyll with a ligule. Araucaria. **Monoeciour. Megasporophyll without a ligule. Agathis.