equisetums

In the equisetums, the condition in question has been specially noticed to occur after prolonged drought.

Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants

Plants are represented by _Voltzia_ and by equisetums and ferns.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"

Mesozoic formations we appear to have a fair representation of the flora of the period, including such varied forms as ferns, equisetums, cycads, conifers, and monocotyledons.

Darwinism (1889)

And this cannot be considered improbable in view of the highly differentiated land plants -- ferns, equisetums, and lycopods -- in the Middle or Lower

Darwinism (1889)