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29 de abr. de 2024 · Ferns; Lycophytes; Videos; What is this? Florulas; Image Wall; Keys; Map. List of Countries; Data
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A complete, synonymic checklist of the Ferns and Lycophytes of the World. CAUTION: Because two families were added, the families Desmophlebiaceae and Hemidictyaceae with 3 species are not displayed in "World Ferns" any more. We are asap fixing this.
9 de mar. de 2024 · Abstract. WorldFerns and WorldPlants are synonymic checklists of the vascular plants of the world (including ferns and lycophytes). The data set has been compiled – independently from other catalogues - over the last 40 years by starting from the basic data of the Kew Index and the Index Filicum.
2 de may. de 2024 · Fern, class of several thousand species of nonflowering vascular plants that reproduce by spores. Ferns have true roots, stems, and complex leaves and constitute an ancient division of plants. Learn about their physical characteristics, life cycle, genetics, evolutionary history, and classification.
Some fern species, such as bracken ( Pteridium aquilinum) and water fern ( Azolla filiculoides ), are significant weeds worldwide. Some fern genera, such as Azolla, can fix nitrogen and make a significant input to the nitrogen nutrition of rice paddies. They also play certain roles in folklore.
Today, ferns are the second-most diverse group of vascular plants on Earth, outnumbered only by flowering plants. With around 10,500 living species (PPG 1), ferns outnumber the remaining non-flowering vascular plants (the lycophytes and gymnosperms) by a factor of 4 to 1.
Article History. Ferns (division Pteridophyta) are an ancient group of nonflowering vascular plants. They have true roots, stems, and complex leaves and reproduce by spores. Ferns can be found nearly worldwide and more than 9,000 extant species are known to science.
