7 Pollen cone with many juvenile microsporophylls
6 Pollen cone at initiation of microsporophylls
3 Ovulate cone at apical growth of macrosporophylls
4 Ovulate cone just before ovule initiation
2 Ovulate cone at initiation of macrosporophylls
1: Leaf primordia at various developmental stages. This shoot apex is 2 mm in height.
2,3:Macrosporophylls are regularly arranged.
5:Outline of juvenile sporophylls are similar to that of mature ones.
7:Pollen cone is directly transformed from vegetative shoot apex. New vegetative
shoot apex forms at the axil of a leaf.
8:Apex of ovulate cone is directly transformed into a vegetative shoot
apex, which, in turn, eventually develops into an ovulate cone.
Scales:1 division = 1 mm,
5 Ovule primordia on macrosporophylls
8 Vegetative shoot apex surrounded by seed bearing spoorphylls
Shoot apex