Editing Archaeopteris (section)

== Other modern adaptations ==
Aside from its woody trunk, ''Archaeopteris'' possessed other modern adaptations to light interception and perhaps to seasonality as well. The large umbrella of fronds seems to have been quite optimized for light interception at the canopy level. In some species, the pinnules were shaped and oriented to avoid shading one another. There is evidence{{citation needed|date=August 2015}} that whole fronds were shed together as single units, perhaps seasonally like modern [[deciduous]] foliage or like trees in the cypress family [[Cupressaceae]].

The plant had nodal zones that would have been important sites for the subsequent development of lateral roots and branches. Some branches were latent and adventitious, similar to those produced by living trees that eventually develop into roots. Before this time, shallow, [[Rhizome|rhizomatous]] roots had been the norm, but with ''Archaeopteris'', deeper root systems were being developed that could support ever higher growth.