| The meristem that gives rise to each new geotropic tuber is exogenous, formed from surface tissue where the leaves and strobili join the old tuber. |
| Female strobili are initiated in late summer or fall in a year, then they overwinter. |
| Female strobili emerge followed by pollination in the following spring. |
| At left is a picture of the clubmoss Lycopodium obscurum showing the habit of the plant and position of the strobili, or cones. |
| The microsprophylls of cycads are arranged in strobili and bear clusters of microsporangia on their abaxial surface. |
| Immature female and male strobili cones were harvested from a 40-year-old Norway spruce tree, 2 weeks prior to pollen release. |
