1. The ovule has a conspicuous nucellar beak and pollen chamber. 2. The sporogenous tissue is deep within the nucellus. 3. Differentiation of the mother cell has taken place by the first of May. 4. One mother celt is usual, but more may occur. 5. A peculiar kinoplasmic mass is present in the mother cell. 6. The gametophyte number of chromosomes is eight. 7. The first spindle is obliquely placed in the mother cell. 8. The tetrad may be complete or incomplete. 9. The tetrad is usually linear, but sometimes bilateral, or a combination of bilateral and linear. 10. The lowest spore is the functional cell. 11. The spore is vacuolate from the first and the free nuclei of following stages are probably always parietally placed, 12. Free nuclear division is at first simultaneous but gradually becomes irregular. 13. Free nuclear division extends, approximately, from the second week in May until the first week in July. 14. The cytoplasm, at first delicate, becomes granular and forms upon its outer surface a delicate ...