There is some debate as to the evolutionary beginnings of the genus Equisetum. Molecular dating places the divergence of the 15 extant species of the genus around 65 million years ago (mya), yet ...

From your photo (which we were unable to reproduce for the column) you appear to have Equisetum hyemale. This species is sometimes planted as an ornamental but needs containment to avoid its ...

Nevertheless, equisetum figures in the diet of comparatively few animals. The reason is that in addition to the toxins present in many modern species it wears down animals' teeth too much.

Field Horsetail (Equisetum arvense) is a cosmopolitan fern widespread throughout ... ferns maintain this early strategy of sexual reproduction. There are 15-25 known species of Equisetopsida. They ...

Imagine yourself back to the time of the dinosaurs. What can you see? We've created a scavenger hunt that will help bring that time to life for you. If you could travel back to the Jurassic Period ...