Thin stems sprout from joints along hollow stems. The Equisetum horsetails around today generally grow to around 30-150 centimetres tall (although the giant horsetail (Equisetum myriochaetum) is a ...

Also shown is stem of a giant horsetail -- calamites (the one growing at an odd angle). The winged insect climbing a horsetail (equisetum) is a primitive cockroach Manoblatta sp. Flying insects ...