Examples include certain species of lycopodium and selaginella , which have two rows of lateral leaves and one or two rows of smaller abaxial or adaxial leaves 例如石松属和卷柏属，植物体上具有双行较大的侧生叶，还有1行或2行较小的生于近轴面或远轴面的叶。
2.
A known amount of lycopodium spores was added to each sample to calculate the concentration of pollen ( grains / gram ) . pollen was examined at magnifications of 100 + and 400 + and identified using modern pollen collections and published atlases P2 - 1 ：该亚带木本花粉的浓度达到了9 . 79粒克，而草本植物花粉的浓度相对于p1带有所下降，气候条件较好，植被为草甸草原。
