Fern fern ("Onoclea sensibilis"). Giant water fern ("Salvinia molesta") is one of the world's worst aquatic weeds. The important fossil fuel coal consists of the remains of primitive plants, including ferns. Ferns have been studied and found to be useful in the removal of heavy metals, especially arsenic, from the soil. Other ferns with some economic significance include: The study of ferns and other pteridophytes is called pteridology. A pteridologist is a specialist in the study of pteridophytes in a broader sense that includes the more distantly related lycophytes. Pteridomania is a term for the Victorian era craze of fern collecting
The Private Life of Plants idea of time-lapse photography to illustrate it: "There were, of course, gardening programmes on the BBC's schedules, but they did not deal with the basic facts of botany, or explain how plants feed, how they reproduce and distribute themselves, how they form alliances with particular animals. The reason was only too obvious. How could you construct the dramatic narratives needed for a successful television documentary series if your main characters are rooted to the ground and barely move? Thinking about this, it suddenly struck me that plants do move and very dramatically." Outdoors time-lapse photography presents a unique set of