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  2. List of endangered plants of North America - Wikipedia

    en.wikipedia.org/wiki/List_of_endangered_plants...

    Adenophorus periens (pendant kihi fern) Adiantum vivesii (Puerto Rico maidenhair) Ctenitis squamigera (Pauoa) Cyathea dryopteroides (elfin tree fern) Diplazium molokaiense (Molokai twinsorus fern) Doryopteris angelica (Kauai digit fern) Dryopteris crinalis (serpent woodfern) Elaphoglossum serpens (no common name) Isoetes louisianensis ...

  3. Diplazium molokaiense - Wikipedia

    en.wikipedia.org/wiki/Diplazium_molokaiense

    Diplazium molokaiense is a rare species of fern known by the common name Molokai twinsorus fern.It is endemic to Hawaii, where it is one of the rarest ferns. [2] It has historically been found on the islands of Kauai, Oahu, Lanai, Molokai, and Maui, but it is thought to have been extirpated from four of them and today can be found only on Maui where fewer than 70 individual plants remain. [3]

  4. Woodsia alpina - Wikipedia

    en.wikipedia.org/wiki/Woodsia_alpina

    The first reference to this species came in John Ray's 1690 Synopsis, which recorded the discovery of a rare fern near the summit of Snowdon in Wales by Edward Lhwyd. However, the plant was first definitely identified as a separate species from specimens collected in Scotland in James Bolton's 1785 publication Filices Britannica.

  5. Amauropelta noveboracensis - Wikipedia

    en.wikipedia.org/wiki/Amauropelta_noveboracensis

    Amauropelta noveboracensis, the New York fern, [3] is a perennial species of fern found throughout the eastern United States and Canada, from Louisiana to Newfoundland, but most concentrated within Appalachia and the Atlantic Northeast. New York ferns often forms spreading colonies within the forests they inhabit.

  6. Osmundastrum - Wikipedia

    en.wikipedia.org/wiki/Osmundastrum

    The Osmundastrum cinnamomeum fern forms huge clonal colonies in swampy areas. These ferns form massive rootstocks with densely matted, wiry roots. This root mass is an excellent substrate for many epiphytal plants. They are often harvested as osmunda fiber and used horticulturally, especially in propagating and growing orchids. Cinnamon Ferns ...

  7. Sphaeropteris excelsa - Wikipedia

    en.wikipedia.org/wiki/Sphaeropteris_excelsa

    Sphaeropteris excelsa, synonym Cyathea brownii, [2] commonly known as the Norfolk tree fern or smooth tree fern, is probably the largest fern species in the world. It is endemic to Norfolk Island, in the Pacific Ocean near Australia and New Zealand. It is named after the botanist Robert Brown (1773-1858).