In lab today - clubmosses

Clubmosses are a favorite group of plants, the oldest lineage of living vascular plants, relicts of the Devonian and Carboniferous, a glimpse into the primeval world.  What a great group of organisms.  They retain all sorts of features that used to be commonplace, but presently are unusual.  They exhibit dichotomous branching, an equal branching into two axes, both the stems and roots.  They have microphyllous leaves, leaves with a different origin than all the rest of […]